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SUBWOOFER / SATELLITES

Gemini Sound Products Corp.120 Clover Place P.O. Box 6928

Edison, NJ 08818-6928732-738-9003 (Phone) • 732-738-9006 (Fax)

CONTENT’S:

Cautions, Connections, & Operations :....................................Page 2-4

Specifications:..............................................................................Page 4

Parts Lists:....................................................................................Page 5

PCBs:..........................................................................................Page 6-8

Schematics....................................................................................Page 9

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INTRODUCTION:Congratulations on your purchase of an XTR-400 speaker systemengineered & manufactured by Gemini Sound Products. This state of theart speaker system is backed up by a three-year warranty. The XTR-400offers ultimate fidelity, power handling, and an array of features that makesit a highly versatile, compact, self contained & powered speaker system.

FEATURES:• Active self-powered 400W rms tri-amp design.• One 15-inch bandpass subwoofer. Features top-hat hardware for pole mounting of a

satellite speaker and metal corner protectors.• Two high quality satellite speakers featuring 10-inch woofers and dual piezo horns housed in

trapezoidal cabinets. Satellite speakers are uniquely designed for placement on stands or for useas floor monitors, and protected by full front metal grill and metal corners.

• Built-in active optimized crossovers.• Sensitivity/Volume controls.• Satellites equipped with reliable Speakon™ connectors for exceptional sound.

(cables must be purchased separately)• Signal Ground Lift Switch for achieving the quietest possible hum-free operation.• Airflow controlled by variable speed fan for maximum cooling and quietest possible operation.• Mono or Stereo operation.• AC line voltage selector switch allows reconfiguring amplifier for either 110-120V or 220-

240V AC lines.• Compact design featuring large metal handles and casters for ease in transporting.

CAUTIONS:1. All operating instructions should be read before using this equipment.

2. To reduce the risk of electrical shock, do not open the unit. There are,NO USER REPLACEABLE PARTS INSIDE. Please refer servicing to aqualified Gemini Sound Products service technician.

In the USA: If you experience problems with this unit, please call 1 (732) 738-9003 forGemini Customer Service. Do not attempt to return this equipment to your dealer.

3. Do not expose this unit to direct sunlight or to a heat source such as aradiator or stove.

4. This unit should be cleaned only with a damp cloth. Avoid solvents orother cleaning detergents.

5. When moving this equipment, it should be placed in its original cartonand packaging. This will reduce the risk of damage during transit.

6. DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.

7. DO NOT USE ANY SPRAY CLEANER OR LUBRICANT ON ANYCONTROLS OR SWITCHES.

CONNECTIONS:INPUT SECTION:There are two parallel input connectors (one female XLR and one 1/4” jack) perchannel. Either can be used as an input or as a link to chain amplifiers.

XLR INPUT JACKS: XLR INPUT JACKS (1) electronically balancedinputs accept a standard XLR male connector. Pin 1 = shield/ground, pin2 = hot or positive (+) and pin 3 = cold or negative (-).

1/4" PHONO INPUT JACKS: 1/4" PHONO INPUT JACKS (2) accept abalanced as well as an unbalanced line. The unbalanced line uses astandard tip-sleeve connection. The tip is positive and the sleeve isnegative/ground. The balanced line uses a tip-ring-sleeve connection.Tip = hot or positive (+), ring = cold or negative (-), and sleeve = shield/ground.

SENSITIVITY/VOLUME CONTROLS: SENSITIVITY/VOLUME CONTROLS(10) control the input levels for each channel of the 2 satellite speakers.The volume level of the subwoofer is controlled automatically to match thevolume levels of the satellite speakers. It will always maintain a perfectbalance to give you incredible sound quality!

SIGNAL GROUND LIFT SWITCH: SIGNAL GROUND LIFT SWITCH (7)is used to lift the balanced input connectors’ ground/shield from theamplifier’s ground. When the signal ground lifted, the sound sourcedisconnects from the amplifier’s ground preventing ground loops whichcan generate hum and noise. See the Signal Ground Lift SwitchInstructions for more detail.

OUTPUT SECTION:Disconnect unit from the AC power source before making any connections.

SPEAKER OUTPUTS (3): The speaker output connectors are Speakon™connectors that will accept cables with Speakon™ connectors. (Thesecables must be purchased separately) The subwoofer is already connectedinternally, so you don’t have to worry about connecting it to the amplifier.

AC POWER SECTION:POWER SWITCH (8): turns the unit on and off.

POWER LED (9): the power LED lights when the power is on.

FUSE (4): replace with proper type and rating.

AC INLET (6) is used to attach the power cord to the unit.

AC LINE VOLTAGE SELECTOR SWITCH (5) allows reconfiguringamplifier for either 110-120V or 220-240V AC lines.

OPERATION:STEREO OPERATION:The unit has two channels for stereo operation. Each channel provides aseparate signal at the speaker outputs. The following instructions arefor use with 8W speakers of matched power ratings. We suggest onlyusing the speakers that come with the unit.

1. With the power OFF, connect your input cables from your music source(such as your mixer) to the Channel 1 and Channel 2 INPUTS using theXLR INPUT JACKS (1) or 1/4" PHONO INPUT JACKS (2).

2. Connect your speakers to the Channel 1 and Channel 2 SPEAKEROUTPUTS (3).

3. With the SENSITIVITY/VOLUME CONTROLS (10) of both channelsset to zero (fully counter clockwise), turn the POWER SWITCH (8), ON.Okay, now try playing some music and/or talking into your microphone,and set the level of your input as high as you think you’ll need it. This wayit will be as high above the amplifier’s noise floor as possible so you’ll getthe best possible sound with the least amount of noise. Now play somemusic and listen for audible distortion. If you do hear distortion decreasethe output level using the SENSITIVITY/VOLUME CONTROLS (10).

MONO OPERATION:Connect your MONO signal to the Channel 1 input (1 or 2). Now create alink by connecting the remaining Channel 1 input to a Channel 2 input(1 or 2) using a standard balanced cable (may be purchased separately).You can adjust the level of each satellite speaker using it’s channel’sSENSITIVITY/VOLUME CONTROL (10).

USING THE SIGNAL GROUND LIFT SWITCH:Depending on how your sound system is hooked up, sometimes applyingthe ground will create a quieter signal path. Sometimes lifting the groundcan eliminate ground loops and that annoying hum to give you quieter andcleaner overall sound.

1. With the power amp ON, listen to the system in idle mode (no music orsignal) with the ground ON. The SIGNAL GROUND LIFT SWITCH (7) willbe in the left position.

2. Turn the power OFF before moving the SIGNAL GROUND LIFT SWITCH (7).Now lift the ground by moving the SIGNAL GROUND LIFT SWITCH (7)to the right. Turn the power back ON and listen to determine which positionmakes the overall sound quieter with the least amount of noise and hum.

CAUTION: DO NOT DISCONNECT THE AC GROUND ON THE POWER AMPLIFIER IN ANY WAY.THIS CAN BE VERY HAZARDOUS!!

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SETUP:There are various ways to set up this system:

BASIC SETUP:Okay, this is your basic setup, perfect for small parties and venues. Theideal location for your subwoofer is close to a wall or in a corner. Thiswill give you the fullest bass response. Your 2 satellite speakers can beplaced up on stands on each side (stands must be purchased separately).

TWO-SYSTEM SETUP:This setup is perfect for larger venues. This setup requires 2 XTR-400systems. This will give you a total of 800 watts rms! Place a subwooferon each side to the left and right. Using the high-hat hardware andconnecting pole (which can be purchased separately), place thepole in the high-hat socket on the subwoofer, and a satellite speaker ontop of the pole. The 2 remaining satellite speakers may be used as eitherfloor monitors, or placed on stands elsewhere in the room giving you alouder and fuller sound.

Each speaker system in this setup must be used in MONO mode (seeMono section). Connect the system that is on the left side of the audienceto the LEFT channel of your mixer, and the system that is on the right sideof the audience to the RIGHT channel of your mixer.

ACTIVE SPEAKER SYSTEM SUBWOOFER/SATELLITESThe XTR-400 features a unique design for ease in transporting. The 2satellite speakers conveniently fit into a special recessed section of thesubwoofer and are securely fastened using a strap that attaches to thehandles (included).

SHOULD YOU EXPERIENCE ANY DIFFICULTIES OR PROBLEMS,PLEASE CALL: 1 (732) 738-9003 FOR GEMINI CUSTOMER SERVICE.

SPECIFICATIONS:Subwoofer XTR-400SUB:

Amplifier’s Output Power:.........................230 Wrms on subwoofer channelFrequency response:……………………...........................….32 Hz - 100 HzComponents:………………………...........................……………..15" wooferFeatures:

Efficient band-pass cabinet designLarge metal handlesMetal protection cornersFour 2" wheelsAmplifier assembly on the back35mm standmount cap on topBlack carpet finishRubber feet

Dimensions:..............................................................WxDxH: 20"x31"x24.5" (508 x 788 x 622 mm)

Weight:…………………............................……………………..96 lbs (44 kg)Satellites GT-1002s:

Amplifier’s Output Power:..........................2x85 Wrms on satellite channelsFrequency response:…………............................………….100 Hz – 20 kHzComponents:….…………...........................……………………….10" woofer

6” dual piezo hornFeatures:

Trapezoidal cabinetFull front protective metal grillMetal protection corners35 mm standmount cup on the bottomBlack carpet finishRubber feetNeutrik Speakon connector

Dimensions:……….……..............................…….W x D x H 12.5" x 9" x 18" (318 x 229 x 458 mm)

Weight:……………………...........................………………18 lbs (8 kg) eachTotal System:

Maximum SPL, continuous:……...........................……………………120 dBSensitivity………………………...........................……………………. 1 VrmsInput Impedance………...............10 kOhm unbalanced/20 kOhm balancedFeatures:

Balanced XLR and 1/4" Jack inputsNeutrik Speakons on Satellite Channels’ outputsActive electronic X-over (Fx=100 Hz)Variable speed fanIndividual channel Sensitivity/Volume controlsSignal Ground lift switch110-120 VAC / 220-240 VAC switchable

Total Weight:……………............…...............………………...132 lbs (60 kg)SPECIFICATIONS AND DESIGN ARE SUBJECT TO CHANGE WITHOUT

NOTICE FOR PURPOSE OF IMPROVEMENT.

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Item # Designators Description Part Number

MAIN PCB:1 ZD3, ZD2 ZENER DIODE 1/2W 12V (RD12EB2) 079-0122 D3, D1, D2 SILICON DIODE 1N4148 079-0033 ZD1 ZENER DIODE 1/2W 24V (RD24EB2) 079-0204 Q1 SILICON TRANSISTORS 2SC1815 076-0035 Q2 SILICON TRANSISTOR 2SC4793 076-1006 C18, C13 ELECTROLYTIC CAPACITORS 6800µµµµµ/50V 050-1987 REC1 BRIDGE RECTIFIER KBPC804W 086-0198 U3, U2, U4, U1 INTEGRATED CIRCUIT TDA7294V 074-189

CROSSOVER PCB:1 VR1, VR2 ROTARY VR 10KA L:15MM 071-2282 LD1 LED (GREEN) 5φφφφφ 080-0863 IC1, IC3, IC2 INTEGRATED CIRCUIT NJM4558DD (BA15218,M5218AP) 074-163

INPUT PCB:1 SW1 SLIDE SWITCH SV70050 081-0302 IC1 INTEGRATED CIRCUIT NJM4558DD (BA15218,M5218AP) 074-1633 X3, X2 PHONE JACK 6.3φφφφφTRS 1/4" BAL 092-0784 XLR2, XLR1 XLR XLF-3PH 092-069

OUTPUT PCB:1 X1, X2 SPEAKON™ CONNECTORS NL4MP 092-149

OTHER:1 AC CORD 093-3692 AC INLET 092-1053 DC FAN 24V 001-6134 TRANSFORMER 059-2475 SLIDE SWITCH 081-0236 POWER SWITCH 083-1217 FUSE VBS UTE 3.15A 250V 100-0688 FUSE VBS UTE 6.3A 250V 100-071

PARTS LIST:

In the USA: If you should experience problems with this unit,please call 1 (732) 738-9003 for Gemini Customer Service.

Do not attempt to return this equipment to your dealer.

XTR400-3XTR400-4

SW1

X1

C1

R1

R2

R3

R4

R6

R7

R8

R9

C2

C3

C4

C5

R5

IC1

X2

X3

XLR1

XLR2 G

++

OUTPUT PCB

INPUT PCB

Page 6

XTR400-1

XTR400-2

RED

RED

/BLK

BLK

RED

BLK

BLK BLK

RED

RED

C8

R5

LD1

J1

C7

C6

C4

C3

C2

C12

C5

C11

C1

C10

C9

IC2

IC3

R11

R20

R9

R6

R14

R15

R21

R2

R8

R19

R12

R13

R10

R3R4

R18

R1

R7

R22

R17

R16

X2

X4

X3

X1

IC1

J2

J3

C13

C14

VR2

VR1

C21

X2

X6X5

X11

X10

X7

X8

X1

X13

Q2

1 R2

X4

C13

R5

C12

AC

AC

+

-

REC1

X9J6

R12

R6

J5J8

R34

J1

J2

J9

J10

J7

ZD1

ZD

2

ZD3

X12

X3

151

U1

115

U4

R37

R3

R36

R10

R7

R28

R29

R1

R24

R33

R19

R20

R16

R15R30

R8

R21

R22

R18

R17

R35

R23

R9

R31

R26

R11

R38R2

7

R32

R14

R25

R4

Q1

L4

L1L3

L2

D2

D1 D3

C19

C5

C3

C29

C1

C23C2

C22

C4

C31

C26

C11

C17

C16

C15

C14

C20

C8

C30

C27C7

C28

C6

C25

C9

C24

C10

J3 J4

115

U2

R13

115

U3

C18

C32

TOP LAYER X-OVERMAIN PCB

XTR400-1

XTR400-2

RED

RED

/BLK

BLK

RED

BLK

BLK BLK

RED

RED

C8

R5

LD1

J1

C7

C6

C4

C3

C2

C12

C5

C11

C1

C10

C9

IC2

IC3

R11

R20

R9

R6

R14

R15

R21

R2

R8

R19

R12

R13

R10

R3R4

R18

R1

R7

R22

R17

R16

X2

X4

X3

X1

IC1

J2

J3

C13

C14

VR2

VR1C21

X2

X6X5

X11

X10

X7

X8

X1

X13

Q2

1 R2

X4

C13

R5

C12

AC

AC

+

-

REC1

X9J6

R12

R6

J5J8

R34

J1

J2

J9

J10

J7

ZD1

ZD

2

ZD3

X12

X3

151

U1

115

U4

R37

R3

R36

R10

R7

R28

R29

R1

R24

R33

R19

R20

R16

R15R30

R8

R21

R22

R18

R17

R35

R23

R9

R31

R26

R11

R38R2

7

R32

R14

R25

R4

Q1

L4

L1L3

L2

D2

D1 D3

C19

C5

C3

C29

C1

C23C2

C22

C4

C31

C26

C11

C17

C16

C15

C14

C20

C8

C30

C27C7

C28

C6

C25

C9

C24

C10

J3 J4

115

U2

R13

115

U3

C18

C32

BOTTOM LAYER X-OVERMAIN PCB

T1SW3

SW4

C101

6.3A / 110-120V

WHT

BLK

ORG

BLU

BRN

F

SW-POWER

VOLTAGE SELECTOR

L

E

N

F

AC INLET

P2

P3

P1

POWER PCB

230v115vFAN124Vdc/0.19A

C2270

R3 10K 1%

R4 10K 1%R710K 1%

R9 10K 1%

C4 270

CH.2 (R)

TRS

X3 TRS 1/4" BAL

21

3

XLR2XLF-3PH

C3270

R1 10K 1%

R210K 1%

R8 10K 1%

C5 270

TRS

X2 TRS 1/4" BAL

21

3

XLR1XLF-3PH

CH.1 (L)

6

57

IC1BNJM4558DD

2

31

48

IC1ANJM4558DD

R6 10K 1%

+ 12V

- 12V

25

1

4

3

6SW1

C1 0.047uF

"Signal ground lift"

R5 510

+ 12V

- 12V

INPUT

INPUT

CH.1 (L) OUTPUT

CH.2 (R) OUTPUT

INPUT PCB

2

31

48

IC1ANJM4558DD

6

57

IC1BNJM4558DD

2

31

48

IC2ANJM4558DD

2

31

48

IC3ANJM4558DD

R913K 1%

R1039.2K 1%

R839.2K 1%

R1122.1K 1%

C4.047uF5%

R1360.4K 1%

R1810K 1%

C3.047uF5%

R1260.4K 1%

+ 12V

- 12V

X-OVER PCB

R1513K 1%

R739.2K 1%

R139.2K 1%

R1410K 1%

C8.1uF 5%

C5.1uF 5%

R613K 1%

R539.2K 1%

R1939.2K 1%

- 12V

+ 12V

R2022.1K 1%

C2.047uF 5%

C12.047uF 5%

6

57

IC3BNJM4558DD

6

57

IC2BNJM4558DD

R2213K 1%

R17 13K 1%

R2 13K 1%

R4 39.2K 1%R3 39.2K 1%

R21 13K 1%

C110.033uF5%

C1 0.033uF5%

1

2

3

4

5

6

7

X2

VR210KA

VR110KA

+ 12V

- 12V

1

2

3

4

X4

1

2

3

4

X3

1

2

3

X1

C90.1

C100.1

+ 12V+ 12V

- 12V- 12V

C710uF25V NP

C610uF25V NP

LD1GRN

R162.4K

C13100uF16V

C14100uF16V

CH.1 (L) INPUT

CH.2 (R) INPUT

CH.1 (L)

CH.2 (R)

CH.1 (L) OUTPUT

SUB OUTPUT (+)

CH.2 (R) OUTPUT

SUB OUTPUT (-)

VOLUMECONTROL

VOLUMECONTROL

STBY9

IN +3

-Vs 8

IN+MUTE4

-PWVs 15

+Vs 7

BOOTSTRAP 6MUTE10

STBY-GND1

+PWVs 13IN -2

OUT 14

U2 TDA7294V

12

34

REC1KBPS10-02

C11 22uF50V

+E

-E

L2 1.0uH

R10 8R2 1W

C20.1uF100V

R12 13K 1%

R6 26.7K 1%

R41K 1%

C922uF25V

C102200pF

R9 5.1K

C136800uF50V

C186800uF50V

X8 RED

X6 BLACK

X7 RED

C6 10pF

C28 10pF

+E

-E

R175.1K

R185.1K

R34 5.1K

R33 5.1K

R248.2K

R235.1K

C3010uF25V

C3222uF25V

STBY9

IN +3

-Vs 8

IN+MUTE4

-PWVs 15

+Vs 7

BOOTSTRAP 6MUTE10

STBY-GND1

+PWVs 13IN -2

OUT 14

U4 TDA7294V

C21 22uF50V

+E

C160.1

-E

C140.1

L3 1.0uH

R36 8R2 1W

C230.1uF100V

R27 13K 1%

R38 26.7K 1%K

R251K 1%

C2522uF25V

C242200pF

R35 5.1K

R225.1K

R215.1KD3

1N4148

ZD212V 0.5W

R1 8.2K

C3220uF25V

+12V

Q22SC4793

X4

STBY9

IN +3

-Vs 8

IN+MUTE4

-PWVs 15

+Vs 7

BOOTSTRAP 6MUTE10

STBY-GND1

+PWVs 13IN -2

OUT 14

U1 TDA7294V

C5 10uF50V

+E

-E

L1 1.0uH

R3 8R2 1W

C10.1uF100V

R13 13K 1%

R11 26.7K 1%

R141K 1%

C810uF25V

C4390pF

R8 5.1K

C7 10pF

C27 10pF

R155.1K

R165.1K

STBY9

IN +3

-Vs 8

IN+MUTE4

-PWVs 15

+Vs 7

BOOTSTRAP 6MUTE10

STBY-GND1

+PWVs 13IN -2

OUT 14

U3 TDA7294V

C19 10uF50V

+E

C150.1

-E

C170.1

L4 1.0uH

R37 8R2 1W

C290.1uF100V

R31 13K 1%

R26 26.7K 1%

R321K 1%

C2010uF25V

C22390pF

R30 5.1K

R205.1K

R195.1K

ZD124V 0.5W

Q12SC1815

R29 1.2K 3W

R28 1.2K 3W

ZD312V 0.5W

C31100uF16V

C26100uF16V

C124.7uF50V

D21N4148

D1 1N4148

R768

R52.4K

R2 2.4K

T

+E

-12V

X11BLACK

X1RED

X10RED/BLACK STRIP

X2RED

+12V

-12V

1

2

3

X9

1

2

3

4

X3

1

2

3

4

X12

SUB INPUT (-)

CH.2 (R) INPUT

SUB INPUT (+)

CH.1 (L) INPUT

FAN24 Vdc

CH.1 (L)OUTPUT

OUTPUTCH.2 (R)

OUTPUT (+)SUBWOOFER

SUBWOOFEROUTPUT (-)

X5 BLACK

X13 BLACK

To CENTER TAP

To POWER

To POWER

To SPEAKER

To CHASSIS

POWER TRANSFORMER

TRANSFORMER

TRANSFORMER

OUTPUTS

MAIN PCB

OUTPUT

1+

1-

2+

2-

X2 NL4MP

1+

1-

2+

2-

X1 NL4MPP1

RED

P2BLACK

P3

RED/BLACK STRIP

CH.1 (L)

OUTPUT

CH.2 (R)

3.15A / 220-240V

FUSE

OUTPUT PCB

18AWG RED 45sm

18AWG BLACK 45sm

Endsstriped15mm

Twisted pair to Subwoofer terminal

18AWG BLACK 18AWG BLACK

18AWG RED

18AWG

RED/B

LACK S

TRIP

18AWG

BLAC

K

1

2

3

4

5

6

7

X1

1

2

3

4

5

6

7

1

2

3

4

5

6

7

SCHEMATIC

Page 9

Worldwide Headquarters • 120 Clover Place, Edison, NJ 08837 • USATel: (732) 738-9003 • Fax: (732) 738-9006

France • G.S.L. France • 11, Avenue Leon Harmel, Z.I. Antony, 92160 Antony, FranceTel: + 33 (0) 1 55 59 04 70 • Fax: + 33 (0) 1 55 59 04 80

Germany • Gemini Sound Products GmbH • Ottostrasse 6, 85757 Karlsfeld, GermanyTel: 08131 - 39171-0 • Fax: 08131 - 39171-9

UK • Gemini Sound Products • Unit C4 Hazleton Industrial Estate, Waterlooville, UK P08 9JUTel: 087 087 00880 • Fax: 087 087 00990

Spain • Gemini Sound Products S.A. • Rosello, 516, Barcelona, Spain, 08026Tel: 349-3435-0814 • Fax: 3493-347-6961

© Gemini Sound Products Corp. 2002 All Rights Reserved

Parts of the design of this product may be protected by worldwide patents.Information in this manual is subject to change without notice and doesnot represent a commitment on the part of the vendor. Gemini SoundProducts Corp. shall not be liable for any loss or damage whatsoeverarising from the use of information or any error contained in this manual.No part of this manual may be reproduced, stored in a retrieval system ortransmitted, in any form or by any means, electronic, electrical, mechanical,optical, chemical, including photocopying and recording, for any purposewithout the express written permission of Gemini Sound Products Corp.It is recommended that all maintenance and service on this product isperformed by Gemini Sound Products Corp. or its authorized agents.Gemini Sound Products Corp. will not accept liability for loss or damagecaused by maintenance or repair performed by unauthorized personnel.

In the USA: If you experience problems with this unit,call 1-732-738-9003 for Gemini Customer Service.

Do not attempt to return this equipment to your dealer.