Selenium Loudspeakers - PROFESSIONAL LINEiakn.com/PDFs/D250-X_i.pdf · 2005. 12. 26. · HARMONIC...
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The D250-X is a cost-effective compression driver with a light-weight and strong phenolic diaphragm designed for medium band (voice) reproduction in indoor sound systems and small PA systems. The 1" (25 mm) exit fits all Selenium horns with a 25 model number ending (HL14-25, HC23-25, and so on). Its high density magnetic assembly. The voice coil is made of high temperature wire ® wound on Kapton former to withstand high operating temperatures. Its precisely engineered diaphragm structure and alignment mechanism allows for easy, reliable and cost effective repair in case of diaphragm failure. SPECIFICATIONS Nominal impedance.................................. 8 W Minimum impedance @ 615 Hz....................... 7.2 W Power handling 1 Musical Program(w/ xover 500 Hz 12 dB / oct) .... 150 W 1 Musical Program(w/ xover 1,000 Hz 12 dB / oct) . . . 200 W Sensitivity 2 On horn, 2.83V@1m, on axis .................. 107 dB SPL 3 On plane-wave tube,0.0894V .................. 116 dB SPL Frequency response @ -10 dB ............... 400 to 9,000 Hz Throat diameter ................................. 25 (1) mm (in) Diaphragm material ....................................... Phenolic Voice coil diameter .............................. 51 (2) mm (in) Re .............................................. 6.0 W Flux density ..................................... 1.10 T Minimum recommended crossover (12 dB / oct)......... 500 Hz 1 Musical Program= 2 x W RMS. 2 Measured with HL14-25 horn, 1,000 - 3,500 Hz average. 3 The sensitivity represents the SPL in a 25 mm terminated tube, 600 - 1,500 Hz average. ADDITIONAL INFORMATION Magnet material ........................................ Barium ferrite Magnet weight ................................ 332 (11.7) g (oz) Magnet diameter x depth.............. 102 x 12 (4.02 x 0.47) mm (in) Magnetic assembly weight ...................... 978 (2.15) g (lb) Housing material .......................................... Aluminum Housing finish ........................................... Silver epoxy Magnetic assembly steel finish .............................. Zinc-plated Voice coil material ............................................ Copper ® Voice coil former material ......................... Polyimide (Kapton ) Voice coil winding length ...................... 5.7 (18.70) m (ft) Voice coil winding depth....................... 3.0 (0.12) mm (in) Wire temperature coefficient of resistance (a25)..... 0.00404 1/°C 3 Volume displaced by driver.................... 0.5 (0.018) l (ft ) Net weight ................................ 1,290 (2.84) g (lb) Gross weight .............................. 1,360 (2.99) g (lb) Carton dimensions (W x D x H) . . 41 x 30.5 x 10 (16.1 x12 x 4) cm (in) MOUNTING INFORMATION 3 Horn connection .............................. S crew-on 1 / ” - 18 TPI 8 Connectors ......................................... Push terminals Polarity ................. Positive voltage applied to the positive terminal (red) gives diaphragm motion toward the throat Power handling specifications refer to normal speech and/or music program material, reproduced by an amplifier producing no more than 5% distortion. Power is calculated as true RMS voltage squared divided by the nominal impedance of the loudspeaker. This voltage is measured at the input of the recommended passive crossover when placed between the power amplifier and loudspeaker. PROFESSIONAL LINE - Compression Driver D250-X Dimensions in mm. Page: 1/2 Rev.: 00 - 04/03 DRIVER x HORN CONNECTION LOUDSPEAKERS HC5625-SLF D250-X HM11-25 HM17-25 HM25-25 HC23-25 HL50-25 HL40-25 HL14-25 W1 3/8" - 18TPI 76 60 16 ø 112 ø 25
Transcript of Selenium Loudspeakers - PROFESSIONAL LINEiakn.com/PDFs/D250-X_i.pdf · 2005. 12. 26. · HARMONIC...
The D250-X is a cost-effective compression driver with a light-weight and strong phenolic diaphragm designed for medium band (voice) reproduction in indoor sound systems and small PA systems.
The 1" (25 mm) exit fits all Selenium horns with a 25 model number ending (HL14-25, HC23-25, and so on).
Its high density magnetic assembly.The voice coil is made of high temperature wire
® wound on Kapton former to withstand high operating temperatures.
Its precisely engineered diaphragm structure and alignment mechanism allows for easy, reliable and cost effective repair in case of diaphragm failure.
SPECIFICATIONSNominal impedance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 WMinimum impedance @ 615 Hz. . . . . . . . . . . . . . . . . . . . . . . 7.2 WPower handling
1Musical Program(w/ xover 500 Hz 12 dB / oct) . . . . 150 W 1Musical Program(w/ xover 1,000 Hz 12 dB / oct) . . . 200 W
Sensitivity2On horn, 2.83V@1m, on axis . . . . . . . . . . . . . . . . . . 107 dB SPL3On plane-wave tube,0.0894V . . . . . . . . . . . . . . . . . . 116 dB SPL
Frequency response @ -10 dB . . . . . . . . . . . . . . . 400 to 9,000 HzThroat diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 (1) mm (in)Diaphragm material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PhenolicVoice coil diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 (2) mm (in)Re . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 .0 WFlux density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.10 TMinimum recommended crossover (12 dB / oct). . . . . . . . . 500 Hz
1
Musical Program= 2 x W RMS.2 Measured with HL14-25 horn, 1,000 - 3,500 Hz average.
3 The sensitivity represents the SPL in a 25 mm terminated tube, 600 - 1,500 Hz average.
ADDITIONAL INFORMATIONMagnet material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Barium ferriteMagnet weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332 (11.7) g (oz)Magnet diameter x depth. . . . . . . . . . . . . . 102 x 12 (4.02 x 0.47) mm (in)Magnetic assembly weight . . . . . . . . . . . . . . . . . . . . . . 978 (2.15) g (lb)Housing material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AluminumHousing finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Silver epoxyMagnetic assembly steel finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Zinc-platedVoice coil material. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Copper
®Voice coil former material . . . . . . . . . . . . . . . . . . . . . . . . . Polyimide (Kapton )Voice coil winding length. . . . . . . . . . . . . . . . . . . . . . 5.7 (18.70) m (ft)Voice coil winding depth. . . . . . . . . . . . . . . . . . . . . . . 3.0 (0.12) mm (in)Wire temperature coefficient of resistance (a25). . . . . 0.00404 1/°C
3Volume displaced by driver.. . . . . . . . . . . . . . . . . . . 0.5 (0.018) l (ft )Net weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,290 (2.84) g (lb)Gross weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,360 (2.99) g (lb)Carton dimensions (W x D x H) . . 41 x 30.5 x 10 (16.1 x12 x 4) cm (in)
MOUNTING INFORMATION3Horn connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S crew-on 1 / ” - 18 TPI8
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Push terminalsPolarity . . . . . . . . . . . . . . . . . Positive voltage applied to the positive terminal
(red) gives diaphragm motion toward the throat
Power handling specifications refer to normal speech and/or music program material, reproduced by an amplifier producing no more than 5% distortion. Power is calculated as true RMS voltage squared divided by the nominal impedance of the loudspeaker. This voltage is measured at the input of the recommended passive crossover when placed between the power amplifier and loudspeaker.
PROFESSIONAL LINE - Compression Driver
D250-X
Dimensions in mm.
Page: 1/2 Rev.: 00 - 04/03
DRIVER x HORN CONNECTION
L O U D S P E A K E R S
HC5625-SLF
D250-XHM11-25
HM17-25
HM25-25
HC23-25
HL50-25
HL40-25
HL14-25
W1 3/8" - 18TPI
76
60 16
ø 112
ø 25
HARMONIC DISTORTION CURVES W/ HL14-25 HORN, 5 W / 1 m.
POLAR RESPONSE CURVES
RESPONSE AND IMPEDANCE CURVES W/ HL14-25 HORN INSIDE AN ANECHOIC CHAMBER, 1 W / 1 m
Specifications subject to change without prior notice.Page: 2/2 Rev.: 00 - 04/03
HOW TO CHOOSE THE RIGHT AMPLIFIERThe power amplifier must be able to supply twice the RMS driver power. This 3 dB headroom is necessary to handle the peaks that are common to musical programs. When the amplifier clips those peaks, high distortion arises and this may damage the transducer due to excessive heat. The use of compressors is a good practice to reduce music dynamics to safe levels.
FINDING VOICE COIL TEMPERATUREIt is very important to avoid maximum voice coil temperature. Since moving coil resistance (R ) varies with temperature according to a well known law, E
we can calculate the temperature inside the voice coil by measuring the voice coil DC resistance:
T , T = voice coil temperatures in °C.A B
R , R = voice coil resistances at temperatures T and T , respectively.A B A B
a = voice coil wire temperature coefficient at 25 °C.25
÷÷ø
öççè
æ
a+-÷÷
ø
öççè
æ-+=
25
A
A
BAB
125T1
R
RTT
HARMONIC DISTORTION CURVES W/ HL14-25 HORN, 1 W / 1 m.
RESPONSE AND IMPEDANCE CURVES W/ PLANE-WAVE TUBE, 1 mW
Frequency response and impedance curves measured with 25 mm terminated plane-wave tube.
® Kapton : Du Pont trademark.
L O U D S P E A K E R S
D250-X drivercoupled to a
HL14-25 horn
Response Curve.
Impedance Curve.
Response Curve.
Distortion Curve, 2nd harmonic.Distortion Curve, 3rd harmonic.
Response Curve.
Impedance Curve.
BRAZIL Address:ELETRÔNICA SELENIUM S.A.
BR 386 Km 435 / 92.480-000 Nova Santa Rita - RS - Brazil
Fax: +(55) 51 479-1120www.selenium.com.br
USA Adress:SELENIUM USA
USA www.seleniumloudspeakers.com
EUROPE Adress:SELENIUM EUROPE
Germanywww.seleniumloudspeakers.com
PROFESSIONAL LINE - Compression Driver
D250-X
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Polar Response Curve.
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