SRM450 Active Sound Reinforcement Speaker User's Manual
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SRM450 ACTIVE SOUND REINFORCEMENT SPEAKER USER’S MANUAL
Transcript of SRM450 Active Sound Reinforcement Speaker User's Manual
SRM450 ACTIVESOUND REINFORCEMENTSPEAKER USER’S MANUAL
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CAUTION AVISRISK OF ELECTRIC SHOCK
DO NOT OPENRISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCKDO NOT REMOVE COVER (OR BACK)
NO USER-SERVICEABLE PARTS INSIDEREFER SERVICING TO QUALIFIED PERSONNEL
ATTENTION: POUR EVITER LES RISQUES DE CHOCELECTRIQUE, NE PAS ENLEVER LE COUVERCLE. AUCUN
ENTRETIEN DE PIECES INTERIEURES PAR L'USAGER. CONFIERL'ENTRETIEN AU PERSONNEL QUALIFIE.
AVIS: POUR EVITER LES RISQUES D'INCENDIE OUD'ELECTROCUTION, N'EXPOSEZ PAS CET ARTICLE
A LA PLUIE OU A L'HUMIDITE
The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated"dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. Le symbole éclair avec point de flèche à l'intérieur d'un triangle équilatéral est utilisé pour alerter l'utilisateur de la présence à l'intérieur du coffret de "voltage dangereux" non isolé d'ampleur suffisante pour constituer un risque d'éléctrocution.
The exclamation point within an equilateral triangle is intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. Le point d'exclamation à l'intérieur d'un triangle équilatéral est employé pour alerter les utilisateurs de la présence d'instructions importantes pour le fonctionnement et l'entretien (service) dans le livret d'instruction accompagnant l'appareil.
8. Heat — This Mackie product should be situated away from heatsources such as radiators, or other devices which produce heat.
9. Power Sources — This Mackie product should be connected to apower supply only of the type described in these operationinstructions or as marked on this Mackie product.
10. Power Cord Protection — Power supply cords should be routedso that they are not likely to be walked upon or pinched by itemsplaced upon or against them, paying particular attention to cords atplugs, convenience receptacles, and the point where they exit thisMackie product.
11. Object and Liquid Entry — Care should be taken so thatobjects do not fall into and liquids are not spilled into this Mackieproduct.
12. Damage Requiring Service — This Mackie product should beserviced only by qualified service personnel when:
A. The power-supply cord or the plug has beendamaged; or
B. Objects have fallen, or liquid has spilled into thisMackie product; or
C. This Mackie product has been exposed to rain; or
D. This Mackie product does not appear to operatenormally or exhibits a marked change in performance;or
E. This Mackie product has been dropped, or its chassisdamaged.
13. Servicing — The user should not attempt to service thisMackie product beyond those means described in this operatingmanual. All other servicing should be referred to the Mackie ServiceDepartment.
14. To prevent electric shock, do not use this polarized plug with anextension cord, receptacle or other outlet unless the blades can befully inserted to prevent blade exposure.
Pour prévenir les chocs électriques ne pas utiliser cette fichepolariseé avec un prolongateur, un prise de courant ou une autresortie de courant, sauf si les lames peuvent être insérées à fondsans laisser aucune pariie à découvert.
15. Grounding or Polarization — Precautions should be taken sothat the grounding or polarization means of this Mackie product isnot defeated.
16. Power Precaution — Unplug this Mackie product duringlightning storms or when unused for long periods of time. Note thatthis Mackie product is not completely disconnected from the ACmains when the power switch is in the OFF position.
17. This apparatus does not exceed the Class A/Class B (whicheveris applicable) limits for radio noise emissions from digital apparatusas set out in the radio interference regulations of the CanadianDepartment of Communications.
ATTENTION —Le présent appareil numérique n’émet pas de bruitsradioélectriques dépassant las limites applicables aux appareilsnumériques de class A/de class B (selon le cas) prescrites dans lerèglement sur le brouillage radioélectrique édicté par les ministeredes communications du Canada.
SAFETY INSTRUCTIONS1. Read Instructions — All the safety and operation instructionsshould be read before this Mackie product is operated.
2. Retain Instructions — The safety and operating instructionsshould be kept for future reference.
3. Heed Warnings — All warnings on this Mackie product and inthese operating instructions should be followed.
4. Follow Instructions — All operating and other instructionsshould be followed.
5. Water and Moisture — This Mackie product should not be usednear water – for example, near a bathtub, washbowl, kitchen sink,laundry tub, in a wet basement, near a swimming pool, swamp orsalivating St. Bernard dog, etc.
6. Cleaning — Clean only with a dry cloth.
7. Ventilation — This Mackie product should be situated sothat its location or position does not interfere with its properventilation. For example, the Component should not be situatedon a bed, sofa, rug, or similar surface that may block anyventilation openings, or placed in a built-in installation such as abookcase or cabinet that may impede the flow of air throughventilation openings.
PORTABLE CART WARNING
Carts and stands - TheComponent should be usedonly with a cart or standthat is recommended bythe manufacturer.A Component and cartcombination should bemoved with care. Quickstops, excessive force, anduneven surfaces may causethe Component and cartcombination to overturn.
WARNING — To reduce the risk of fire or electricshock, do not expose this appliance to rain or moisture.
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Lend Me Your EarsExposure to extremelyhigh noise levels maycause permanent hear-ing loss. Individuals vary
considerably in susceptibility to noise-in-duced hearing loss, but nearly everyone willlose some hearing if exposed to sufficientlyintense noise for a period of time. The U.S.Government’s Occupational Safety andHealth Administration (OSHA) has speci-fied the permissible noise level exposuresshown in this chart.
According to OSHA, any exposure inexcess of these permissible limits couldresult in some hearing loss. To ensureagainst potentially dangerous exposure tohigh sound-pressure levels, it is recommend-ed that all persons exposed to equipmentcapable of producing these levels use hearingprotectors while this unit is in operation.Ear plugs or protectors in the ear canals orover the ears must be worn when operatingthis amplification system in order to preventa permanent hearing loss if exposure is inexcess of the limits set forth here.
Duration Per Day Sound Level dBA, Typical In Hours Slow Response Example
8 90 Duo in small club6 924 95 Subway Train3 972 100 Very loud classical music
1.5 1021 105 Tami screaming at Adrian about deadlines
0.5 110 0.25 or less 115 Loudest parts at a rock concert
CONTENTSINTRODUCTION....................................................... 4HOOKUP DIAGRAMS............................................... 6
Quick Start ........................................................ 6REAR PANEL DESCRIPTION .................................... 8
IEC Socket .................................................. 8 POWER Switch ............................................ 8 POWER ON Indicator ................................... 8 TIMED TURNOFF......................................... 8 THERMAL Indicator ..................................... 8 CONTOUR .................................................. 9 LOW CUT .................................................... 9 LEVEL ......................................................... 9 SIGNAL PRESENT Indicator ........................ 9 PEAK Indicator ............................................ 9 INPUT Connector ........................................ 9 THRU Connector ......................................... 9 ACCESSORY Plate ...................................... 9
CONNECTIONS...................................................... 10PLACEMENT .......................................................... 10RIGGING ................................................................ 11THERMAL CONSIDERATIONS ................................ 12AC POWER CONSIDERATIONS .............................. 12SERVICE INFORMATION ........................................ 14
Warranty Service ............................................. 14Troubleshooting ............................................... 14Repair ............................................................. 16
CARE AND MAINTENANCE.................................... 16SRM450 SPECIFICATIONS ..................................... 17SRM450 BLOCK DIAGRAM .................................... 18SRM450 LIMITED WARRANTY ............................... 19
Don’t forget to visit our website at www.mackie.comfor more information about this and other Mackie products.
The SRM450can produce amaximum SPLof 127 dB @ 1m.
Part No. 820-158-90 Rev. A 10/03©2003 LOUD Technologies Inc. All Rights Reserved.
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INTRODUCTIONThank you for choosing LOUD Technologies’
Mackie active sound reinforcement speakers.The SRM450 is an active two-way loud-
speaker capable of extremely high soundpressure levels, and designed to give you thebest performance of any loudspeaker in itsclass and price range.
Our design goal was to build a sound re-inforcement speaker with:1. High precision, high output, and accu-
rate playback.2. Very wide, smooth dispersion of mid
and high frequencies.3. Ergonomically correct physical design
for easy transport and set up.Through the combined resources of our
top-notch mechanical and analog engineers,and our experienced transducer engineersat RCF, our transducer manufacturing facil-ity in Italy, we were able to achieve ourdesign goals in every aspect. The result is asound reinforcement system equally at homein a concert setting, in the studio, impromptuconcerts on the studio roof, in the cinema, orin a home theater.
The TransducersThe SRM450 active speakers feature a
12-inch high-power low-frequency wooferand a 1.75-inch titanium diaphragm high-output precision compression driver. Thishigh-frequency driver is mounted on anacoustically non-resonant exponentialwaveguide, providing a wide, controlleddispersion and precise reproduction of thecritical upper mid-range and high frequen-cies. The result is an unbelievably smoothoff-axis response that allows everyone inthe audience to experience the same high-resolution audio no matter where they areseated.
Each driver has been specifically designedby our engineers for optimum performancein the lightweight high-strength cabinet.
FR Series Power AmplifiersTo power these beautiful things, each
SRM450 includes two of our acclaimed FRSeries “Fast Recovery” power amplifiers. Ourexclusive design uses low negative feedback,yet allows the amplifiers to maintain low dis-tortion and stability and to quickly recoverwhen driven into clipping.
The amplifiers include the followingfeatures:• The low-frequency amplifier produces
up to 540 watts peak (300 continuous)before clipping.
• The high-frequency amplifier producesup to 150 watts peak (100 continuous)before clipping.
• Each amplifier has its own compressorcircuit that acts when the input signal islarge enough to cause clipping, distor-tion and excessive voice coil heat. Thecompressor will automatically decreasethe input signal to a safe level. Thecompressor in the low-frequency ampworks independently from that in thehigh-frequency amp.
• The low-frequency amp uses a servofeedback loop which senses the currentflowing in the woofer coil. This controlsthe low-frequency response and main-tains low distortion at high output levels.
• The low-frequency amplifier also has asweeping filter. This will automaticallymove the low cut-off frequency up ordown depending on the amplifieroutput. For example, if the amplifier isbelow clipping, the low-frequency cut-off point is 55 Hz. As it approachesclipping, this shifts up smoothly to120 Hz, providing more power reservesand less distortion before clipping. Thishappens quickly and continuously,protecting the amplifer and the wooferand reducing any noticable distortion.
Warning: Although theamplifiers have theseprotection circuits, youmust still make sure thePEAK light is not blink-
ing continuously. If it is, turn down yourmixer faders, or preamplifier gain, or turndown the SRM450 LEVEL control.
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The CrossoverThe built-in electronic crossover is a
24 dB/octave Linkwitz-Riley design.Although more expensive than other cross-over designs, the benefits provided by theLinkwitz-Riley design have been well docu-mented. These benefits include:• Absolutely flat frequency response
throughout the bandpass, without thecharacteristic ripple near the crossoverpoint exhibited by other designs.
• The sharp 24 dB per octave roll-off ofthe filters ensures that the transducersaren’t reproducing frequencies outsideof their capabilities.
• The acoustic sum of the two driverresponses is unity at the crossoverfrequency, resulting in perfect powerresponse.
• Our heroic engineers have workedcarefully to ensure that the SRM450also provides perfect phase response.This diligence has yielded phenomenalaccuracy, even if you are standing 20feet away.
The CabinetThe SRM450 cabinet was designed to be
the strongest molded composite cabinet onthe planet. This material is as strong as con-crete, and rigid enough to preventunwanted vibrations in the cabinet. It hasbuilt-in fly points for hanging, and a socketin the bottom for mounting on a tripodstand. Although it is an exceptional choicefor installed sound situations, its lightweight and durable finish also make it idealfor portable sound system use. The asym-metrical trapezoidal design of the cabinetmakes it easy to use as a floor wedge forstage monitor applications.
The Active AdvantageThere are a number of advantages to us-
ing an active speaker system over a passiveloudspeaker:• The internal crossover is active, and its
low power circuitry operates on line-level signals. It does not waste speaker-level power like a passive crossover withlarge coils, caps, and resistors.
• The input signals are crossed overbefore they reach the amplifiers, so eachamplifier only receives the correctfrequency range for its driver.
• The amplifiers are designed specificallyfor these speaker load impedances.There is no guesswork as to what loadeach amplifier has to drive, so they canprovide maximum acoustic output fromthe speakers, yet minimize the danger ofspeaker damage due to overdriving alesser amplifier.
• The connecting wires between theamplifier outputs and the drivers arekept to a minimum, so the dampingfactor of the amplifier isn’t compro-mised by the resistance of long speakercables. In addition, all the power fromthe amplifier is transferred directly tothe drivers with no speaker cable losses.
• The acoustic sum of the outputs fromthe two drivers is optimized electroni-cally, as well as physically, so theamplitude response is flat and there isno lobing error.
• The presence of active circuits withinthe speaker cabinet allow the designerto add on extra details, such as a highquality mic/line input section andoptional accessory modules.
In short, all the complex interconnectedcomponents in the system are designed towork in harmony with each other to pro-duce the best possible sound. (Even forUncle Bert’s star performance on spoons!)
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HOOKUP DIAGRAMSQuick Start1. Start with the following settings on the
back of the SRM450:Turn the POWER switch off (down).Set the TIMED TURNOFF, CONTOUR,and LOW CUT switches out.
WARNING: Turn theLEVEL control down(counterclockwise)before every use. If not,you could be in for a
startling surprise, especially if the lasttime you used it was with a microphoneand now you want to connect a line-level source.
2. Connect the output from your signalsource (mixing console, microphone,preamp, or other mic- or line-levelsource) directly to the INPUT connectoron the back of the SRM450. It acceptsbalanced line-level signals from mixers,preamplifiers, CD players, tape decks,etc., and accepts direct connections fromdynamic microphones.
3. Connect the supplied AC power cord tothe IEC socket on the back of theSRM450. Plug the other end into an ACoutlet properly configured with thecorrect voltage for your particular model.
4. Turn on your signal source. Make sure itsMaster Volume control (if it has one) isturned all the way down.
5. Turn on the SRM450 POWER switch.6. Start the signal source, whether it be
speaking into a microphone or starting aCD player. Adjust any volume controls onthe signal source for normal operation.
7. Slowly turn up the LEVEL control onthe back of the SRM450 until thedesired volume is reached (and thePEAK light does not come on). Alwayswear hearing protectors if you are closewhen it is playing at high levels.
8. If there is no sound, always turn downthe SRM450 LEVEL control beforeinvestigating. There may be a mixer orpreamplifier mute or tape switchengaged, or a mic switch off.
DESIGNED BY MACKOIDS IN WOODINVILLE, WA • USADESIGNED BY MACKOIDS IN WOODINVILLE, WA • USA
Mixer orPreamplifier
RightLine levelOutput
LeftLine level
Output
DESIGNED BY MACKOIDS IN WOODINVILLE, WA • USA DESIGNED BY MACKOIDS IN WOODINVILLE, WA • USA
DESIGNED BY MACKOIDS IN WOODINVILLE, WA • USA DESIGNED BY MACKOIDS IN WOODINVILLE, WA • USADESIGNED BY MACKOIDS IN WOODINVILLE, WA • USADESIGNED BY MACKOIDS IN WOODINVILLE, WA • USA
ThruThru
Next
Next
1202-VLZPRO
1202-VLZPRO
SRM450: STEREO OPERATION WITH A MIXER, AND USING THE THRU JACK
Daisy-chainingSRM450s
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THRUOutput
DynamicMicrophone
DESIGNED BY MACKOIDS IN WOODINVILLE, WA • USA DESIGNED BY MACKOIDS IN WOODINVILLE, WA • USA
SRM450: USING A MICROPHONE AND THE THRU JACK
PowerCord
PowerCord
PoleMount
PoleMount
Line-levelHi-pass
out
Line-levelHi-pass
out
FullRange
FullRange
PowerCords
PowerCords
SWA1501plays the lowfrequencies
SWA1501plays the lowfrequencies
ACTIVEACTIVE
1202-VLZPRO
SRM450: BIAMPING WITH A POWERED SUBWOOFER
The SRM450 can beused with a MackieSWA1501 (or SWA1801)subwoofer to create an in-credibly powerful system.
The active crossoverinside the SWA1501splits the full-range inputsignal into two ranges.The SWA1501 plays thelow-frequency rangethrough its 500 watt ampli-fier and 15-inch woofer,and sends the high-passrange to the SRM450.
The SRM450 can bepole mounted on top ofthe SWA1501 as shown,saving the cost of a tripodstand.
For microphone connections, you candaisy-chain up to two SRM450s using theTHRU jacks as shown.
Take great care to point any micro-phones away from the SRM450s, otherwiseyou may get feedback.
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REAR PANEL DESCRIPTION
TIMED TURNOFF
When this switch is pushed in, the built-in amplifiers turn on and off depending onthe presence or absence of an input signal.An input signal level of –45 dBu (mini-mum) activates the auto-on function. Asilent period greater than three minutesactivates the auto-off function. The blueLED on the front of the speaker reflects thestate of the amplifiers.
THERMAL Indicator
This LED lights if the heatsink tempera-ture exceeds a safe operating temperatureand triggers the thermal safety switch.When this occurs, the built-in amplifiersshut down until the heatsink temperaturecools back down. Then the thermal switchresets itself, the THERMAL indicator turnsoff, and normal operation resumes.
If the SRM450 keepsshutting down, makesure there is plenty ofventilation to the rearpanel. Please see “Ther-
mal Considerations” on page 12.
The SRM450 has several connectors,controls, and indicators that you shouldunderstand.
IEC SocketThis is where you connect the supplied
AC linecord to provide AC power to theSRM450’s built-in power amplifiers. Plugthe linecord into an AC socket properlyconfigured for your particular model.
Note: If you happen to lose the AC line-cord, replacements are readily available atany office or computer supply store. Alwaysuse a three-pin plug with a ground pin.
POWER SwitchSwitch up to turn the SRM450 on, and
switch down to turn it off. Make sure thelevel control is down before you turn it on.
POWER ON IndicatorWhen the POWER switch is turned on,
and the linecord is connected to an activeAC Mains supply, this indicator, locatedjust above the POWER switch, glows to letyou know that you’re ready to rock androll. The cool blue LED on the front of thespeaker works in the same way.
DESIGNED BY MACKOIDS IN WOODINVILLE, WA • USA
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CONTOURPushing in this switch engages a filter
that provides 3 dB of boost to the low andhigh frequencies (below 100 Hz and above12 kHz). This provides a punchy, crispsound for most live music applications. Youcan experiment with this switch by leavingit out for a while, then pushing it in to de-termine which way sounds best for yourapplication. It is especially useful when lis-tening at lower volumes, as it highlights thebass like a Loudness switch, in addition toboosting the highs.
LOW CUT
Pushing in this switch engages a low-cutfilter, which rolls off the low frequencies be-low 75 Hz. This is useful for minimizingstage noise (rumble) and microphone han-dling noise.
It is highly recommendedthat you engage thisswitch when using theSRM450 as a stage moni-tor. This allows the bass
amplifier to utilize its power for those fre-quencies useful in stage monitorapplications.
LEVELThis is used to adjust the signal level, go-
ing into the built-in power amplifiers, fromOff up to 40 dB of gain. Since the SRM450incorporates Mackie’s world-class low-noisemic preamp technology, you can connecteither a line-level or a microphone-level signalto the input, and use this control to adjustthe level correctly.
There is no phantompower for a microphone,so you should use adynamic mic, or use acondensor type if it has
its own battery power.Follow the Quick Start guide on page 6
for setting the LEVEL control. For mostapplications, it will be in the NORMALposition (12 o’clock). If you have a particu-larly high line-level signal connected to theSRM450, you may need to turn the controldown to the LINE indication (9 o’clock). Ifyou have a low line-level or mic-level signalconnected, you may need to turn the LEVELcontrol up to the MIC indication (3 o’clock).
SIGNAL PRESENT IndicatorThis LED illuminates whenever there is
a signal present at the INPUT connector onthe rear panel. It senses the signal just priorto the LEVEL control, so even if the LEVELcontrol is turned down, the SIGNALPRESENT indicator still works.
PEAK Indicator
When the signal levels at the amplifieroutputs approach clipping, a soft compres-sion circuit is activated that reduces theinput signal. The PEAK LED lights when-ever the compression circuit is active. Atthis time, the SRM450 may reach soundpressure levels of 120 dB or more.
It’s okay for the PEAK indicator to blinkoccasionally, but if it blinks frequently orcontinuously, either turn down the signallevel at the mixer or other signal source, orturn down the SRM450’s LEVEL control.
Wear hearing protectionif you are close to theSRM450 playing at highlevels.
INPUT ConnectorThis is a female XLR-type connector that
accepts a balanced or unbalanced mic- orline-level signal.
THRU ConnectorThis is a male XLR-type connector that
produces exactly the same signal that isconnected to the INPUT jack. It can be abalanced or unbalanced mic- or line-levelsignal. Use it to daisy-chain several activespeakers together off the same signal source.
ACCESSORY Plate
This removable plate provides access toinstall future accessory modules.
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PLACEMENTThe SRM450 active speakers are de-
signed to sit on the floor, a tabletop, or to fiton a standard tripod speaker stand. Theycan also be suspended by the rigging points,shown opposite.
You can lay the cabinet down on its sideand use the SRM450 as a floor monitor. Theasymmetrical trapezoidal shape of the cabinetprovides a perfect angle for aiming up towardperformers from the front of the stage. Whenused for monitor applications, we recom-mend engaging the LOW CUT filter.
As with any poweredcomponents, protectthem from moisture. Ifyou are setting them upoutdoors, make sure they
are under cover if you expect rain.
The SRM450 generatesmagnetic fields. Do notplace them closer than twoor three feet (60–100 cm)from TV or computer
monitors. Check the screen for any changein color or distortion. Do not place anymagnetic audio or video tapes or computerdiscs near the SRM450s.
Room AcousticsThe SRM450 active speakers are de-
signed to sound as neutral as possible; thatis, to reproduce the input signal as accu-rately as possible, monitoring the soundrather than changing it.
Room acoustics play a crucial role in theoverall performance of a sound system.However, the wide high-frequency disper-sion of the SRM450 helps to minimize theproblems that typically arise.
Balanced XLR Connectors
CONNECTIONSThe SRM450 has a female XLR input
that accepts a balanced or unbalanced mic-or line-level signal. When connecting a bal-anced signal, be sure it’s wired per AES(Audio Engineering Society) standards:
XLRHot (+) Pin 2Cold (–) Pin 3Shield (Ground) Pin 1
There is also a male XLR connector la-beled THRU. This allows you to connectmore than one SRM450 to the output ofyour mixing console. Simply plug the signalsource output into the first INPUT jack,and patch that speaker’s THRU jack to thenext INPUT jack, and so on, daisy-chainingmultiple speakers (see diagram on page 6).
There is a limit to howmany you can daisy-chaintogether. A general rule isto maintain a load imped-ance ten times or more
than the source impedance to prevent ex-cessive loading on the source. For example,if your mixer has an output impedance of120 ohms, then you can daisy chain up tosixteen SRM450s. This is a load of 1250 ohms(SRM450 input impedance=20 kohms;16 of these in parallel=1250 ohms).
Since microphones typically have ahigher output impedance, you should limitdaisy-chaining from a mic source to twoSRM450s (see the diagram on page 7).
The THRU jack is wired straight fromthe INPUT connector — there is no elec-tronic circuitry between — so the signalcoming out of the THRU jack is exactly thesame as the signal going in.
Top
900 Dispersionup to 20 kHz
900
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Here are some other placement tips:• Avoid placing loudspeakers in the corners
of a room. This increases the low-fre-quency output and can cause the sound tobe muddy and indistinct.
• Avoid placing loudspeakers against a wall.This, too, increases the low frequency output,though not as much as corner placement.However, if you do need to reinforce the lowfrequencies, this is a good way to do it.
• Avoid placing the active speakers directly ona hollow stage floor. A hollow stage canresonate at certain frequencies, causing peaksand dips in the frequency response of theroom. It’s better to place the active speakerson a sturdy table or tripod stands.
• Position the active speakers so the high-frequency drivers are two to four feet aboveear level for the audience (make allowancesfor a standing/dancing in the aisles audi-ence). High frequencies are highly directionaland tend to be absorbed much easier thanlower frequencies. By providing direct line-of-sight from the active speakers to theaudience, you increase the overall brightnessand intelligibility of the sound system.
• Highly reverberant rooms, like many gymna-siums and auditoriums, are a nightmare forsound system intelligibility. Multiple reflec-tions off the hard walls, ceiling, and floor playhavoc with the sound. Depending on thesituation, you may be able to take some stepsto minimize the reflections, such as puttingcarpeting on the floors, closing draperies tocover large glass windows, or hangingtapestries or other materials on the walls toabsorb some of the sound.However, in most cases, these remedies arenot possible or practical. So what do you do?Making the sound system louder generallydoesn’t work because the reflections becomelouder, too. The best approach is to provide asmuch direct sound coverage to the audienceas possible. The farther away you are fromthe speaker, the more prominent will be thereflected sound.Use more speakers strategically placed sothey are closer to the back of the audience.If the distance between the front and backspeakers is more than about 100 feet, youshould use a delay processor to time-alignthe sound. (Since sound travels about 1 footper millisecond, it takes about 1/10 of asecond to travel 100 feet).
SRM450
Rigging Points
Both SidesBack
BottomTop
PoleMount
RIGGINGThe SRM450 cabinets are fitted with ten
rigging points as shown in the diagram below.These are M10 inserts. M10 threaded eye-bolts (M10 x 1.5 mm x 20 mm) are availableto fit these inserts (PA-A1 Eyebolts).
WARNING: Never at-tempt to suspend theSRM450 active speakersby their handles. If youwant to suspend them,
use the rigging points only. Consult a pro-fessional rigger or structural engineer priorto suspending loudspeakers from a structurenot intended for that use. Always know theworking load limit of the structure support-ing the loudspeaker array. Always makesure that the rigging hardware minimumrating is at least five times the actual load.
If you are hanging themin an inaccessable place,such as over a lion’s cage,make sure that you firstcomplete the sound check
and set the SRM450 LEVEL correctly. Alsoset the TIMED TURNOFF switch if youwant the SRM450 to turn on when there isa signal present. It will also turn off afterthree or more minutes of silence.
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AC POWERCONSIDERATIONS
Be sure the SRM450 is plugged into anoutlet that is able to supply the correct volt-age specified for your model. If the voltageshould drop below 97% of the specified linevoltage, the built-in amplifiers will nolonger be able to supply rated power. (Theywill continue to operate down to 75% ofthe rated line voltage, but won’t reach fullpower, resulting in lower headroom).
Under maximum S.P.L. conditions,where musical peaks are clipping, theSRM450 120V model draws 2.5 amps onaverage (1.3 amps for the 240V model). Un-der normal conditions, the current draw isbelow 1 amp.
We recommend that a stiff (robust) sup-ply of AC power be used because theamplifiers place high current demands onthe AC line. The more power that is avail-able on the line, the louder the speakers willplay and the more peak output power willbe available for cleaner, punchier bass. Asuspected problem of “poor bass perfor-mance” is often caused by a weak ACsupply to the amplifiers.
AC Power Distribution
A 240VAC center-tapped service en-trance transformer serves the majority ofAC outlets encountered in homes and clubs(in the U.S.). This provides two phases ofAC power on either side of the center tap,at 120V each.
If lighting is used in a show, it is prefer-able to power the lights from one leg of theservice, and power the audio equipmentfrom the other leg. This will help minimizenoise from the lights coupling into the au-dio (particularly if SCRs, or light-dimmerswitches, are used).
THERMALCONSIDERATIONS
The amplifiers inside theSRM450 are convectioncooled by a largeheatsink. For efficientcooling, it is important to
allow at least six inches of free space behindthe SRM450.
If you use the SRM450on its side for stage moni-tor applications, wehighly recommended thatyou engage the rear panel
LOW CUT switch. This will allow morepower for useful monitor frequencies, whilereducing the possibility of overheating.
If the ambient temperature in the roomis high, it could cause the amplifiers to over-heat. In this case, you should try aiming afan at the heatsink to increase the air flowthrough the fins.
During a performance, don’t have itcranked so high that the rear panel PEAKLED is blinking frequently or lighting con-tinuously. You should turn down theLEVEL control a notch or two to avoidoverheating the amplifiers or your neighbors.
If the amplifiers do overheat, a built-inthermal switch will activate, placing theamplifiers into standby. When the amplifiershave cooled down to a safe operating tem-perature, the thermal switch will reset andthe SRM450 will resume normal operation.
HEATSINK
THERMAL
TRANSFORMER
120V
120V
240V
HIGH VOLTAGE POWER LINE
EARTHGROUND
(NEUTRAL)
PRIMARYWINDING
SECONDARYWINDING
240V CENTER-TAPPED SECONDARY
PEAK
LOW CUT
DESIGNED BY MACKOIDS IN WOODINVILLE, WA • USA
13
Wherever possible, connect all of yourequipment to the same electrical circuit.This will help reduce the possibility of aground loop problem causing an annoyinghum in your speakers.
Low power components such as tapedecks, mixers, effects processors and CDplayers should be connected to the sameoutlet as the SRM450s. Use fused powerstrips as shown in the diagram below. Makesure that the total current draw of yourcomponents does not exceed the capabilityof the outlets and power strips.
For the US 120 V model:A maximum of five SRM450s can be
connected per 15A service.This allows each SRM450 to be safely
operated at its maximum level.
When turning your system on, turn onthe SRM450s last. This will stop any turn-on thumps and bangs from your sourceequipment being amplified.
When turning off your system, turn offthe SRM450s first. This will prevent anyturn-off thumps and bangs from yoursource equipment being amplified.
SRM450 SRM450
When setting up for ashow, often you are plug-ging into an AC powerdistribution system youknow nothing about. You
may even be faced with 2-wire outlets thatare missing the third safety ground pin. It’sa good idea to have a three-wire AC outlettester in your toolbox so you can check theoutlets yourself to make sure they are wiredcorrectly. These testers will tell you if thepolarity of the hot and neutral wires is re-versed and if the safety ground isdisconnected.
Don’t use an outlet if it iswired improperly! This isto protect yourself as wellas your equipment.
Never remove the groundpin on the power cord ofthe SRM450 or any othercomponent. This is verydangerous.
SRM450: AC CONNECTIONS
14
SERVICE INFORMATIONWarranty Service
Details concerning Warranty Service arespelled out on page 19 of this manual.
If you think your loudspeaker has aproblem, please do everything you can toconfirm it before calling for service, includ-ing reading through the followingtroubleshooting section. Doing so mightsave you from being deprived of yourMackie loudspeaker.
If you do find the prob-lem, make sure that youturn down the LEVELcontrols and turn off theSRM450 before correct-
ing it or changing any connections.Of all Mackie products returned for ser-
vice (which is hardly any at all), many arecoded “CND” — Could Not Duplicate—which usually means the problem lay some-where else in the system. The followingtroubleshooting tips may sound obvious,but here are some things you can check:
Troubleshooting
No power!• Our favorite question: Is it plugged in?
Make sure the AC outlet is live (checkwith a tester or lamp).
• Our next favorite question: Is the POWERswitch on? If not, try turning it on.
• Is the blue light on the front panelilluminated? If not, make sure the ACoutlet is live. If so, refer to “No sound”below.
• The AC line fuse inside the chassis isblown. This is not a user-serviceablepart. Refer to “Repair” on page 16 tofind out how to proceed.
No sound!• Is the input LEVEL control turned all
the way down? Follow the proceduresin the “Quick Start” section on page 6to verify that all the volume controls inthe system are properly adjusted.
• Is the signal source working (and makingunion scale)? Make sure the connectingcables are in good repair and securely
connected at both ends. Make sure theoutput volume (gain) control on themixing console or preamp is turned upsufficiently to drive the inputs of thespeaker. You should be able to see theSIGNAL PRESENT LED blink on therear panel.
• Make sure the preamp or mixer doesnot have a Mute on, or a Tape orProcessor loop engaged. If you findsomething like this, make sure thevolume/gain is turned down beforedisengaging the offending switch.
• Is the THERMAL LED lit? Make sure thereis at least six inches of free space behindthe heatsinks. Allow the SRM450 to cooloff and it will turn back on.
One side is way louder than the other!• Are the LEVEL controls set the same on
both active speakers?• Check the PAN control or balance on
the signal source. It may be turned toofar to one side. If you’re using a stereosignal source, it may be delivering anout-of-balance stereo signal.
• Try swapping sides: Turn off the activespeakers, swap the input cables comingfrom the mixing console, turn the activespeakers back on. If the same side is stilllouder, the problem may be with youractive speakers or cables between themixer and the active speaker. If theother side is louder now, the problem iswith the mixer or the signal source.
Poor bass performance
• Check the polarity of the connectionsbetween the mixer/preamp and theactive speakers. You may have yourpositive and negative connectionsreversed at one end of one cable, causingone SRM450 to be out-of-phase.
As soon as the music gets loud, theSRM450 shuts down!
• Be sure that the PEAK LED on the rearpanel is not lighting up frequently orcontinuously.
Remember to wear earprotectors if you get closeto an SRM450 playing athigh levels. When thePEAK LED comes on,
the SPL is in a region above 120 dB!!!
15
• Make sure there is room behind the rearpanel to provide sufficient ventilation tothe heatsink.
Bad sound!• Is it loud and distorted? Follow the
procedures described in the “QuickStart” section to verify that the levelsare set properly.
• Is the input connector plugged com-pletely into the jack? Be sure allconnections are secure. It’s a good ideato periodically clean all electricalconnections with a non-lubricatingelectrical contact cleaner.
Noise• Make sure all connections to the active
speakers are good.• Make sure none of the signal cables are
routed near AC cables, power trans-formers, or other EMI-inducing devices.
• Is there a light dimmer or other SCR-based device on the same AC circuit asthe SRM450? Use an AC line filter orplug the SRM450 into a different ACcircuit.
Hum• Turn the LEVEL control all the way
down. If the noise disappears, it’scoming from the signal source. If not,try disconnecting the cable connected tothe INPUT jack. If the noise disappears,it could be a “ground loop,” rather thana problem with the SRM450. Try someof the following troubleshooting ideas:
• Use balanced connections throughoutyour system for the best noise rejection.
• Whenever possible, plug all the audioequipment’s linecords into outlets whichshare a common ground (see the diagramon page 13). The distance between theoutlets and the common ground shouldbe as short as possible.
Never remove the groundpin on the power cord ofthe SRM450 or any othercomponent. This is verydangerous.
• The hum may appear when using anunbalanced source (consumer preamp,CD player, VCR, etc.). This is caused by
shield
123
XLRRCA3-Conductor Cable
the unbalanced-to-balanced interfacebetween the devices (and exacerbatedby the fact that most consumer audioequipment have a two-wire linecord,without the third-pin safety ground).Use an interconnect cable wired asshown below. The important point isthat the shield and the wire from theXLR pin 3 are joined at the RCA(source) end.
• Disconnect any cables which come infrom outside, such as cable TV, satelliteTV or roof top antennas. They must bedisconnected from every part of yoursystem, such as the TV, VCR andpreamp. If the hum goes away, you canadd a “ground loop isolator” in yourcable line. This is an inexpensive deviceavailable from video or TV dealers, oryou can make your own from two TVbaluns (standard TV 75/300 ohmadaptors):
The baluns are threaded at one end(75 ohm) to fit TV coax cable and havetwo wires at the other end (300 ohm).They will not affect the video quality.
• If the hum persists, try removing compo-nents one at a time from the back of themixer or preamplifier, and check for humeach time (turn off your equipment beforeyou undo any connections). It is fairlycommon to find more than one problem.
• If your preamp or mixer are the onlythings connected to the SRM450s andthe hum is still there, try differentconnection cables, or move the preamp/mixer to another location.
• Pressing the LOW CUT FILTER mayhelp reduce the hum if you have troublefinding the cause of the problem. Do thisanyway if you do not need to reproducethe lower frequency range.
join (+insulate) BalunBalun
16
REPAIRService for the SRM450 is available only
from one of our authorized domestic ser-vice stations or at the factory, located insunny Woodinville, Washington. Serviceoutside the United States can be obtainedthrough local dealers or distributors.
If your SRM450 needs service, please fol-low these instructions:1. Review the preceding troubleshooting
suggestions. Please.2. Call Tech Support at 1-800-258-6883,
7 AM to 5 PM PST, to explain theproblem in detail. They will ask you allsorts of impertinent questions in the hopeof sorting out the problem. If it appearsthat the SRM450 needs repair, requestan RA (Return Authorization) number.Have your speaker’s serial number ready.You must have an RA number beforeyou can obtain service at the factoryor an authorized service center.
3. Keep this owner’s manual and detach-able linecord. We don’t need them torepair the loudspeaker.
4. Pack the loudspeakerin its original package,including protective wrap,endcaps, and box. This isvery important. When
you call for the RA number, please letTech Support know if you need newpackaging. LOUD Technologies is notresponsible for any damage that occursdue to non-factory packaging.
5. Include a legible note stating your name,shipping address (no P.O. boxes),daytime phone number, RA number,and a detailed description of the prob-lem, including how we can duplicate it.
6. Write the RA number in BIG PRINTon top of the box.
7. Ship the loudspeaker to us. We suggestinsurance for all forms of cartage. Shipto this address:
MACKIESERVICE DEPARTMENT16220 Wood-Red Rd. NEWoodinville, WA 98072
8. We’ll try to fix the speaker within fivebusiness days. Ask Tech Support for thelatest turnaround times when you callfor your RA number. We normally sendeverything back prepaid by groundshipping. However, if you rush yourspeaker to us by next-day air, we’ll treatit in kind by shipping it back to you thesame way in which it was received. Thisparagraph does not necessarily apply tonon-warranty service.
CARE AND MAINTENANCEYour Mackie active speakers will provide
many years of reliable service if you followthese guidelines:
Avoid exposing theloudspeakers to moisture.If they are set up out-doors, be sure they areunder cover if you expect
rain or you live in Washington.• Avoid exposure to extreme cold (below
freezing temperatures). If you mustoperate the loudspeakers in a coldenvironment, warm up the voice coilsslowly by sending a low-level signalthrough them for about 15 minutesprior to high-power operation.
• Use a slighty damp cloth with a mildsoap solution to clean the cabinets. Onlydo this when the power is turned off.Avoid getting moisture into any of theopenings of the cabinet, particularlywhere the drivers are located.
Need Help?You can reach a technical support representative
Monday through Fridayfrom 7 AM to 5 PM PST at:
1-800-258-6883After hours, visit www.mackie.com and click Support,
or email us at: [email protected]
17
SRM450 SPECIFICATIONSLine Input Power
US 120 VAC, 60HzRecommended amperage service 2.5 ampsEurope 230 VAC, 50HzRecommended amperage service 1.25 ampsJapan 100 VAC, 50/60HzRecommended amperage service 3.0 ampsAC Connector 3-pin IEC 250 VAC
Control System FunctionElectronic CrossoverPhase AlignmentEqualizationParametric Equalization
Safety FeaturesOver-Excursion Protection
Second-Order High-Pass FilterThermal Protection Amplifier shutdown,
auto-resetLow-Line Voltage Shut Down
60% Nominal lineDriver Protection Independent LF and
HF compressorsLow-Freq Roll-Off Dynamic, signal-level
dependent
Construction FeaturesBasic Design Asymmetrical TrapezoidalEnclosure Alignment Sixth-OrderMaterial PolypropyleneFinish Grey, textured finishHandles One on each side, one on topMounting Methods
Integrated mounting points, M10Two each located on each side,top, bottom, and rear of enclosure
Grille Perforated metal with weather-resistant coating
Display LEDs Signal Present, Peak, Power ON,and Thermal
Physical PropertiesHeight 26.0 in/660 mmWidth 15.4 in/390 mmDepth 14.8 in/376 mmWeight 51 lb/23.2 kg
OptionsPA-A1 forged shoulder eyebolt hardware(M10 x 1.5 mm x 20 mm)
DisclaimerSince we are always striving to make our
products better by incorporating new and improvedmaterials, components, and manufacturing methods,we reserve the right to change these specifications atany time without notice.
“Mackie.,” the “Running Man” figure, and“FR Series” are registered trademarks of LOUDTechnologies Inc.
All other brand names mentioned are trade-marks or registered trademarks of their respectiveholders, and are hereby acknowledged.
©2003 LOUD Technologies Inc.All Rights Reserved.
System SpecificationsFrequency Response (–3 dB)
55 Hz – 18 kHzFrequency Range (–10 dB)
45 Hz – 20 kHzDirectivity Factor; Q (DI) 9.95 (9.98), averaged
2 kHz to 10 kHzMax SPL Long-term @ 1m 124 dBMax SPL Peak @ 1m 127 dBCrossover Linkwitz-Riley,
24 dB/octave @ 1600 Hz
AudioInput Type Balanced DifferentialInput Impedance 20 kohmsInput Protection RFI and level protectedSensitivity
Line: +4 dBu (center detent)Mic: –36 dBu
Maximum Input Level +22 dBuLow-Cut Frequency 75 Hz, Second-order filterAcoustic Contour Equalization
Peaking: +3 dB @ 100 Hz,+3 dB @ 12 kHz
Accessory Interface ± 15 VDC,normalized signal I/O
Operating Temperature Range –10ºC to 45ºC (14ºF to 113ºF)
Power AmplifiersLow-Frequency Power Amplifier
Rated Power 300 watts*Rated THD < 0.1%Cooling Convection ExtrusionDesign Class G, Parametric Servo Feedback
High-Frequency Power AmplifierRated Power 100 watts*Rated THD < 0.1%Cooling Convection ExtrusionDesign Conventional Class AB
*Rated power is continuous rms wattage into transducer’srated impedance @ 1 kHz for the HF amplifier and @ 100 Hzfor the LF amplifier.
TransducersLow-Frequency Transducer
Diameter 12 in/300 mmVoice Coil Diameter 2.5 in/63 mmSensitivity (1W@1m) 98 dBNominal Impedance 8 ohmsPower Handling 450 watts, programFrequency Range 45 Hz – 3 kHz
High-Frequency TransducerDiaphragm Diameter 1.75 in/44.5 mmDiaphragm Material TitaniumSensitivity (1W@1m) 106 dBNominal Impedance 8 ohmsPower Handling 100 watts, programFrequency Range 1 kHz – 20 kHz
Horn DesignType Conical and ExponentialMouth Size 12 in/304.8 mm (W) x
7 in/177.8 mm (H)Throat Diameter 1 in/25.4 mmHorizontal Coverage 90º (1 kHz–20 kHz)Vertical Coverage 45º (2.8 kHz–20 kHz)
18
SRM450 BLOCK DIAGRAM
INPU
T
THRU
2 31
2
J15
31
HI-P
ASS
LOW
CUT
CONT
OUR
COM
PRES
SOR
THRE
SHOL
D
COM
PRES
SOR
SWEE
PING
FILT
ER
LO-P
ASS
DELA
Y
176u
S
HI-F
REQ
40-12
0 H
zLO
-FRE
QUEN
CYDR
IVER
TWEE
T
LO-F
REQ
AMP
HI-F
REQ
AMP
SENS
ERE
SIST
OR
BASS
CON
TROL
SER
VO L
OOP
WOO
F
PEAK
LIG
HT
PEAK
DETE
CTIO
N
MAC
KIE
SRM
450
BLOC
K DI
AGRA
M(#
0603
22SE
DF)
THRE
SHOL
DLP
FTH
RESH
OLD
+ –MID
VDC
+ –LO V
DC
+ –H
I VDC
TORO
IDAL
POW
ERTR
ANSF
ORM
ER
FUSE
POW
ERSW
ITCH
ONOFF
+15V
DC
SIG
NAL
SENS
E
SIG
NAL
SENS
EM
UTE
ON/O
FFCO
NTRO
L
MUT
EM
UTE
POW
ERLE
DSTH
ERM
ALLE
D
THER
MAL
SWITC
H
LOW
AC
VOLT
S SE
NSE
TIM
EDTU
RNOF
F
SIG
NAL
LED
19
A. LOUD Technologies Inc. warrants all materials,workmanship and proper operation of this MackieSRM450 for a period of five years from the originaldate of purchase with the following exception:warranty on all its loudspeaker componentsincluding woofers and compression drivers are onlywarranted for two years. If any defects are found inthe materials or workmanship or if the product failsto function properly during the applicable warrantyperiod, LOUD Technologies, at its option, willrepair or replace the product. This warrantyapplies only to equipment sold and deliveredwithin the U.S. by LOUD Technologies Inc. or itsauthorized dealers.B. Failure to register online or return the productregistration card will not void the five-year warranty.C. Service and repairs of Mackie products are to beperformed only at the factory (see D below) OR at anAuthorized Mackie Service Center (see E below).Unauthorized service, repairs, or modification willvoid this warranty.D. To obtain factory service:
1. Call LOUD Technologies at 800/258-6883,7 AM to 5 PM Monday through Friday (PacificTime) to get a Return Authorization (RA). Productsreturned without an RA number will be refused.2. Pack the SRM450 in its original shippingcarton. If you do not have the carton, just ask forone when you get your RA number, and we’llsend a shipping carton out promptly. Moreinformation on packing can be found in theService section of this manual. Also include anote explaining exactly how to duplicate theproblem, a copy of the sales receipt with priceand date showing, and your return street address(no P.O. boxes or route numbers, please!). If wecannot duplicate the problem or establish thestarting date of your Limited Warranty, we may,at our option, charge for service time.3. Ship the product in its original shippingcarton, freight prepaid to:
MACKIESERVICE DEPARTMENT
16220 Wood-Red Road NEWoodinville, WA, 98072, USA
IMPORTANT: Make sure that the RA number isplainly written on the shipping carton.
E. To obtain service from an Authorized Mackie ServiceCenter:
1. Call LOUD Technologies at 800/258-6883,7 AM to 5 PM Monday through Friday (PacificTime) to get: 1) The name and address of yournearest Authorized Mackie Service Center and2) A return authorization (RA). You must havean RA number before taking your unit to aservice center.2. Make sure that you have a copy of yourloudspeaker’s sales receipt from the store whereyou bought the product. It is necessary to establishpurchase date and thus determine whether or notyour loudspeaker is still under warranty. If you can'tfind it, the Authorized Service Center may chargeyou for repairs even if your loudspeaker is stillcovered by the Five-Year Limited Warranty.3. Make sure that the problem can be dupli-cated. If you bring your loudspeaker to anAuthorized Service Center and they can't find
anything wrong with it, you may be charged aservice fee.4. If the Authorized Mackie Service Center islocated in another city, pack the loudspeaker inits original shipping carton. More information onpacking can be found in the Service section ofthis manual.5. Contact the Authorized Mackie Service Centerto arrange service or bring the loudspeaker to them.
F. LOUD Technologies and Authorized MackieService Centers reserve the right to inspect anyproducts that may be the subject of any warrantyclaims before repair or replacement is carried out.LOUD Technologies and Authorized Mackie ServiceCenters may, at their option, require proof of theoriginal date of purchase in the form of a dated copyof the original dealer’s invoice or sales receipt. Finaldetermination of warranty coverage lies solely withLOUD Technologies or its Authorized Service Centers.G. Mackie loudspeakers returned to LOUD Tech-nologies and deemed eligible for repair orreplacement under the terms of this warranty willbe repaired or replaced within thirty days of receiptby LOUD Technologies. LOUD Technologies mayuse refurbished parts for repair or replacement ofany product. Products returned to LOUD Technolo-gies that do not meet the terms of this Warranty willbe repaired and returned C.O.D. with billing forlabor, materials, return freight, and insurance.Products repaired under warranty at the factory willbe returned freight prepaid by LOUD Technologiesto any location within the boundaries of the USA.H. LOUD Technologies warrants all repairsperformed on Mackie products for 90 days or forthe remainder of the original warranty period.LOUD Technologies assumes no responsibility forthe quality or timeliness of repairs performed byAuthorized Mackie Service Centers.I. This warranty is extended to the originalpurchaser and to anyone who may subsequentlypurchase this product within the applicablewarranty period.J. This is your sole warranty. LOUD Technologiesdoes not authorize any third party, including anydealer or sales representative, to assume anyliability on behalf of LOUD Technologies or to makeany warranty for LOUD Technologies Inc.K. THE WARRANTY GIVEN ON THIS PAGE IS THESOLE WARRANTY GIVEN BY LOUD TECHNOLOGIESINC. AND IS IN LIEU OF ALL OTHER WARRANTIES,EXPRESS AND IMPLIED, INCLUDING THEWARRANTIES OF MERCHANTABILITY ANDFITNESS FOR A PARTICULAR PURPOSE. THEWARRANTY GIVEN ON THIS PAGE SHALL BESTRICTLY LIMITED IN DURATION TO FIVE YEARSFROM THE DATE OF ORIGINAL PURCHASE FROMAN AUTHORIZED MACKIE DEALER. UPONEXPIRATION OF THE APPLICABLE WARRANTYPERIOD, LOUD TECHNOLOGIES INC. SHALLHAVE NO FURTHER WARRANTY OBLIGATIONOF ANY KIND. LOUD TECHNOLOGIES INC.SHALL NOT BE LIABLE FOR ANY INCIDENTAL,SPECIAL, OR CONSEQUENTIAL DAMAGES THATMAY RESULT FROM ANY DEFECT IN THEMACKIE PRODUCT OR ANY WARRANTY CLAIM.Some states do not allow exclusion or limitation ofincidental, special, or consequential damages or alimitation on how long warranties last, so some ofthe above limitations and exclusions may not applyto you. This warranty provides specific legal rightsand you may have other rights which vary fromstate to state.
Please keep your sales receipt in a safe place.SRM450 LIMITED WARRANTY
LOUD Technologies Inc.16220 Wood-Red Road NE • Woodinville, WA 98072 • USA
US and Canada: 800.898.3211
Europe, Asia, Central and South America: 425.487.4333
Middle East and Africa: 31.20.654.4000
Fax: 425.487.4337 • www.mackie.com
E-mail: [email protected]
