PROFESSIONAL LINE - Driver
DT150 OEM
LOUDSPEAKERS
The DT150 OEM is a driver specially designed to offer a smooth extended frequency response over a broad band, from mid to highs with high efficiency. Ideal for compact two way systems that require excellent performance with high power output and superb frequency response. The magnetic assembly with high flux density is provided by FEA (Finite Element Analisys) software. The 1” phenolic dome diaphragm is light weight and extremely reliable, covering the frequency range from 1,500 Hz to 15,000 Hz with high fidelity. The voice coil is made of high temperature wire wound on Nomex ® former to withstand high operating temperatures. The DT150 OEM is capable of handling up to 75 watts RMS or 150 watts (Musical Program) if connected to a 12 dB/octave crossover with a 4,000 Hz cut-off frequency. 3 The driver has a standard 1 /8" - 18 TPI screw mounting. A precisely engineered diaphragm structure and alignment mechanism allows for easy, reliable and cost effective repair in case of diaphragm failure.
DRIVER x HORN CONNECTION HM11-25
HM17-25E
SPECIFICATIONS Nominal impedance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Ω Minimum impedance @ 6,300 H z . . . . . . . . . . . . . . . . . . . . . 9.6 Ω Power handling Musical Program(w/ xover 2,000 Hz 12 dB / oct) 1. . . . 80 W Musical Program(w/ xover 4,000 Hz 12 dB / oct) 1. . . 150 W Sensitivity 2 On horn,1W @ 1m, on axis . . . . . . . . . . . . . . . . . . . . 108 dB SPL Frequency response @ -6 dB. . . . . . . . . . . . . . 1,500 to 15,000 Hz Throat diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 (1) mm (in) Diaphragm material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Phenolic Voice coil diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 (1) mm (in) Re . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0 Ω Flux density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.50 T Minimum recommended crossover (12 dB / oct) . . . . . . . 4,000 Hz
HM25-25 DT150 OEM
HC23-25
1
Specifications to handle normal speech and music program material with 5% maximum acceptable distortion on amplifier, with the recommended passive crossover connected. Power is calculated taking into account the true RMS voltage at amplifier output along with transducer nominal impedance. Musical Program= 2 x W RMS. 2 Measured with HM11-25 horn, 2,000 - 8,000 Hz average.
ADDITIONAL INFORMATION Magnet material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Barium ferrite Magnet weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290 (10) g (oz) Magnet diameter x depth . . . . . . . . . . . . . . . 82 x 14 (3.23 x 0.55) mm(in) Magnetic assembly weight . . . . . . . . . . . . . . . . . . . . . . 665 (1.47) g (lb) Housing material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Plastic Housing finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Black Magnetic assembly steel finish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Zinc-plated Voice coil material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CCAW Voice coil former material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Nomex® Voice coil winding length. . . . . . . . . . . . . . . . . . . . . . . 2.4 (7.87) m (ft) Voice coil winding depth . . . . . . . . . . . . . . . . . . . . . . . 2.0 (0.08) mm (in) Wire temperature coefficient of resistance (α25) . . . . . 0.00435 1/°C Volume displaced by driver . . . . . . . . . . . . . . . . . . . . . 0.3 (0.011) l (ft 3) Net weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 735 (1.62) g (lb) Gross weight (12 pieces per carton) . . . . . . . . . . . 10,000 (22.05) g (lb) Carton dimensions (W x D x H) . . . . 32 x 36 x 13.5 (12.6 x 14.2 x 5.3)
ø 82
65 W1 3/8" - 18TPI
c m (in)
MOUNTING INFORMATION Horn connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Screw-on 13/ 8" - 18 TPI Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Push onterminals Polarity . . . . . . . . . . . . . . . . Positive voltage applied to the positive (+) terminal gives diaphragm motion toward the throat
Page: 1/2 Ed.: 00 - 04/01
HL14-25
ø 25
45
15
5
Dimensions in mm.
PROFESSIONAL LINE - Driver
DT150 OEM
LOUDSPEAKERS RESPONSE CURVE MEASURED W/ HM11-25 HORN INSIDE AN ANECHOIC CHAMBER, 1 W / 1 m
HARMONIC DISTORTION CURVES W/ HM11-25 HORN, 7.5 W / 1 m.
120
140
110 120
100 100
90
80
80
70 200
500
1k
2k Hz
5k
10k
60
20k
200
Response Curve.
500
1k
2k Hz
5k
10k
20k
Response Curve. Distortion Curve, 2nd harmonic. Distortion Curve, 3rd harmonic.
IMPEDANCE AND PHASE CURVES MEASURED W/ HM11-25 HORN IN FREE-AIR. 40
90
30
45
POLAR RESPONSE CURVES 2 kHz 30°
0
4 kHz 330°
-10
60°
20
0 -6
300°
-20 dB
90°
240° 150°
-45
180°
210°
0 -6
8 kHz 330°
-10
60°
30°
240° 150°
180°
500
1k
2k Hz
5k
10k
270°
240° 150°
180°
210°
DT150 driver coupled to a HM11-25 horn.
-90 200
300°
120°
210°
Polar Response Curve. 0
330°
-20 dB
270° 90°
120°
0 -6 -10
60°
300°
-20 dB
270° 90°
120°
10
30°
20k
HOW TO CHOOSE THE RIGHT AMPLIFIER The 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.
Impedance Curve. Phase Curve.
HARMONIC DISTORTION CURVES W/ HM11-25 HORN, 1 W / 1 m. 120
FINDING VOICE COIL TEMPERATURE It is very important to avoid maximum voice coil temperature. Since moving coil resistance (RE ) varies with temperature according to a well known law, we can calculate the temperature inside the voice coil by measuring the voice coil DC resistance:
100
R 1 TB = TA + B − 1 TA − 25 + α 25 RA
T A , TB= voice coil temperatures in °C. R A , RB= voice coil resistances at temperatures T A and TB, respectively. α25= voice coil wire temperature coefficient at 25 °C.
80
60
40 200
500
1k
2k Hz
5k
10k
20k
Response Curve. Distortion Curve, 2nd harmonic. Distortion Curve, 3rd harmonic.
®
Nomex : Du Pont trademark.
Specifications subject to change without prior notice. Page: 2/2 Ed.: 00 - 04/01
EUROPE Address: BRAZIL Address: USA Address: SELENIUM EUROPE ELETRÔNICA SELENIUM S.A. SELENIUM LOUDSPEAKER USA BR 386 Km 435 / 92.480-000 St. Elisabethenstrasse 6 1701 South Park Court, Bldg 102 65396 Walluf / Ober-Walluf - Germany Chesapeake, VA 23320 - USA Nova Santa Rita - RS - Brazil Phone: +(49) 6123 601570 Phone: (757) 424-7516 / (800) 562-0510 Fax: +(55) 51 479-1120 Fax: +(49) 6123 601587 URL: www.selenium.com.br Fax: (757) 424-5246 E-mail:
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