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Directed Audio 750d 1500d - page 1
models 750d 1500d ...
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Directed Audio 750d 1500d - page 2
2 © 2003 Directed Electronics, Inc T ABLE OF CONTENTS CONGRA TULA TIONS Congratulations for choosing a Directed Audio power amplifier from Directed Electronics, the industry leader in high quality automotive security and audio equipment since 1990. Directed Audio power amplifiers continue to set new standards of perfor- mance, reliability , and af ...
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Directed Audio 750d 1500d - page 3
LIMITED TWO-YEAR CONSUMER W ARRANTY 3 © 2003 Directed Electronics, Inc Directed Electronics, Inc. promises to the original purchaser , to replace this product should it prove to be defective in workman- ship or material under normal use, for a period of two years from the date of purchase by the dealer as indicated by the date code marking of the ...
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Directed Audio 750d 1500d - page 4
4 © 2003 Directed Electronics, Inc High-powered car audio systems may produce sound pressure levels that exceed the threshold at which hearing loss may result. They may also impair a driver’ s ability to hear traffic sounds or emergency vehi- cles. Use common sense and practice safe listening habits when listening to or adjusting your audio syst ...
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Directed Audio 750d 1500d - page 5
5 © 2003 Directed Electronics, Inc INST ALLA TION GUIDELINES 1. Please read this owner’ s manual carefully before installing this ampli- fier . 2. Disconnect the batter y ground terminal prior to making any elec- trical connections. 3. Check for any hazards or obstruc- tions such as gas tanks, fuel or brake lines, and wiring harnesses before mou ...
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Directed Audio 750d 1500d - page 6
6 © 2003 Directed Electronics, Inc speaker load, the more heat is generated. For low impedance speaker applications or restricted ventilation installations, an external cooling fan may be advisable. 9. Batter y and ground connections to the vehicle should be made with crimped ring terminals of the appro- priate size (surface area is what counts); ...
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Directed Audio 750d 1500d - page 7
7 © 2003 Directed Electronics, Inc 1. R R C C A A I I n n p p u u t t J J a a c c k k s s - - Accepts line level outputs from head units or signal processors at voltages between 150mV and 8 volts. 2. R R C C A A S S y y n n c c O O u u t t / / S S l l a a v v e e I I n n J J a a c c k k Sync Out - This RCA jack sends a Synced or in-phase gain matc ...
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Directed Audio 750d 1500d - page 8
8 © 2003 Directed Electronics, Inc 1. S S u u b b O O u u t t T T e e r r m m i i n n a a l l s s - Connect subwoofers to these terminals. (Refer to the Speaker Wiring Diagrams section of this guide.) 2. S S t t a a t t u u s s L L E E D D s s - The Power LED will light GREEN to indicate the amplifier is on and operating normally . The GREEN LED w ...
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Directed Audio 750d 1500d - page 9
9 © 2003 Directed Electronics, Inc REM GND SUB OUTPUT BAT T 30A x 2 FUSE POWER PROTECTION FIGURE 2—AMPLIFIER CONNECTIONS 750d REAR 15 3 6 2 REM GND SUB OUTPUT BAT T 30A x 3 FUSE POWER PROTECTION FIGURE 3—AMPLIFIER CONNECTIONS 1500d REAR 4 15 3 6 2 4 ...
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Directed Audio 750d 1500d - page 10
10 © 2003 Directed Electronics, Inc TOP P ANEL CONTROLS GAIN FREQ MIN 30Hz MAX 250Hz PHASE BASS EQ SUBSONIC OFF OFF 0 ON ON 180 FIGURE 4—AMPLIFIER CONTROLS TOP 1. I I n n p p u u t t G G a a i i n n A A d d j j u u s s t t m m e e n n t t - Controls the amplifier’ s sensitivity and is used to match the input level of the amplifier to the outpu ...
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Directed Audio 750d 1500d - page 11
SPEAKER WIRING DIAGRAMS 11 © 2003 Directed Electronics, Inc Single subwoofer connection (top view) T wo subwoofer connection (top view) N N O O T T E E : : The dual + and -- subout ter minals of the 750d/1500d are paralleled internally and the combined load impedance should be taken into consideration when connecting multiple subwoofers. ...
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Directed Audio 750d 1500d - page 12
12 © 2003 Directed Electronics, Inc The Viper 750d/1500d subwoofer amplifiers have the capability of connecting two or more amplifiers of the same power rating together in a master/slave combination for increased power with accurate level matching. They are the Parallel Synced Gain and External Synced Bridged combinations. W W A A R R N N I I N N ...
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Directed Audio 750d 1500d - page 13
13 © 2003 Directed Electronics, Inc 1. I I n n p p u u t t S S i i g g n n a a l l - Connect these RCA jacks as described in the Front Panel Connection section of this guide. 2. S S l l a a v v e e / / M M a a s s t t e e r r S S w w i i t t c c h h Set the slave/master switch on the master amplifier to the MASTER position. Set the slave/m ...
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Directed Audio 750d 1500d - page 14
14 © 2003 Directed Electronics, Inc FIGURE 5—P ARALLEL SYNC GAINED 750d/1500d 5 Subwoofer Wiring (top view) N N O O T T E E : : The dual + and -- subout ter minals of the 750d/1500d are paralleled inter- nally and the combined load impedance should be taken into consideration when connecting multiple subwoofers. SUB LEVEL MIN MAX INPUT I/O R L S ...
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Directed Audio 750d 1500d - page 15
15 © 2003 Directed Electronics, Inc 1. I I n n p p u u t t S S i i g g n n a a l l - Connect these RCA jacks as described in the Front Panel Connection section of this guide. 2. S S l l a a v v e e / / M M a a s s t t e e r r S S w w i i t t c c h h Set the slave/master switch on the master amplifier to the MASTER position. Set the slave/m ...
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Directed Audio 750d 1500d - page 16
16 © 2003 Directed Electronics, Inc FIGURE 6—EXTERNAL SYNC BRIDGED 750d/1500d 5 Subwoofer Wiring N N O O T T E E : : The dual + and -- subout ter minals of the 750d/1500d are paralleled internally and the combined load impedance should be taken into consideration when connecting multiple subwoofers. The audio signal to the slave amplifier is 180 ...
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Directed Audio 750d 1500d - page 17
MUL TIPLE AMPLIFIER COMBINA TIONS 17 © 2003 Directed Electronics, Inc The Directed 750d/1500d subwoofer amplifiers can also be used in multiples of the master/slave combinations allowing for unlimited expansion to a systems subwoofer section. T o use multiples of amplifier combinations the following directions must be adhered to for best results. ...
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Directed Audio 750d 1500d - page 18
CROSSOVER SETTINGS AND GAIN ADJUSTMENT 18 © 2003 Directed Electronics, Inc Y our Directed Audio power amplifier needs to be adjusted carefully to achieve maximum performance. These are some guidelines to follow when fine-tuning the amplifier . Because this amplifier is only designed for subwoofer applications, the low-pass crossover is active ...
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Directed Audio 750d 1500d - page 19
SPECIFICA TIONS 19 © 2003 Directed Electronics, Inc 275 425 watts watts 0.4% THD 0.5% Directed model 750d 1500d Signal-to-Noise Ratio Greater than 80 dB Frequency Response 20-250 Hz +0, -1 dB Damping Factor 50 (typical) Crossover Low-pass 18 dB/octave, variable from 30 to 250 Hz Subsonic Filter Switchable 30 Hz, 24 dB/octave Bass Equalization Swit ...
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Directed Audio 750d 1500d - page 20
The company behind this system is Directed Electronics, Inc. Since its inception, Directed has had one purpose, to provide customers with the finest vehicle security , car stereo products, rear seat entertainment, and accessories available. The recipient of more than 20 patents in the field of advanced electronic technology , Directed is ISO 9001 r ...
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