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OWNER’S MANUAL
Model 250d
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CONGRATULATIONS Thank you for choosing a Directed Audio audio design, Directed Audio amplifiers power amplifier. Directed has been the will satisfy every music lover’s needs for leader in high-quality and innovative years to come. Your Directed Audio security products in the U.S. since power amplifier comes with a two year 1990. Now we introduce to the car limited warranty if it is installed by an audio industry the same winning authorized DEI dealer. Amplifiers not formula - products that me
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TABLE OF CONTENTS Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 2 Amplifier Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 4 Amplifier Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Page 5 Speaker Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . .Page 6 Crossover Setting and Gain Adjustment . . . . . . . . . . . . . . . .Page 7 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . .
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INSTALLATION GUIDELINES 1. Please read the owner’s manual more amps than the on board carefully before you install the ampli- fuse(s) of the amplifier(s). The fier. gauge of power wire used should 2. Disconnect the battery ground take into account the total current terminal prior to making any elec- draw of the system, and the length trical connections. of wire used. IASCA and other 3. Check for any hazards or obstruc- autosound competition organiza- tions such as gas tanks, fuel or tions have
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INSTALLATION GUIDELINES (continued) is generated. For low impedance 10. Due to the high-frequency MOSFET speaker applications or restricted switching power supply used in all ventilation installations, an external Directed Audio amplifiers, filtering cooling fan may be advisable. the power cable is not generally 9. Your connections to the amplifier’s required (remember that the amp speaker and power terminals can’t deliver full output if the power should be made with crimped spade supply is res
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AMPLIFIER CONNECTIONS Refer to Figure 1 for details. 1. GROUND TERMINAL - connect this not connect this terminal to a terminal to the car chassis with a constant source of +12V. short heavy gauge wire, DO NOT 3. +12V POWER TERMINAL - connect CONNECT TO THE NEGATIVE this terminal to the positive terminal TERMINAL OF THE CAR BATTERY or of the car or separate audio system to factory chassis ground points battery. Refer to the installation already occupied by factory wires! guidelines and specs pag
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AMPLIFIER CONTROLS Refer to Figure 2 for details. 1. RCA OUTPUT JACKS - use these 5. CROSSOVER FREQUENCY - controls jacks to route the input signal to the frequency range of the ampli- another amplifier. fier. 2. RCA INPUT JACKS - accepts line- 6. BASS EQ - This switch activates an level outputs from head units or 8 dB bass boost circuit. Use as signal sources at voltages from necessary for low frequency 200 mV to 8 volts. enhancement. 3. GAIN ADJUSTMENT - controls the 7. LED INDICATOR - the g
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SPEAKER WIRING DIAGRAMS Single subwoofer connection Speaker nominal impedance must be at least 2 ohm. Amplifier parallels the speaker terminals internally. Two subwoofer connection Parallel speaker nominal impedance must be at least 2 ohm. Amplifier parallels the speaker terminals internally. 6 © 1999 Directed Electronics, Inc
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CROSSOVER SETTINGS AND GAIN ADJUSTMENT Your 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 the 250d is only suited for subwoofer applications, the low-pass crossover is active at all times. The crossover point is adjustable to allow more precise system oper- ation. • Try and keep the setting low enough to prevent image smearing (you should not be able to hear male voices
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SPECIFICATIONS model 250d RMS continuous power driven into 4 ohms 125 watts from 20 to 250 Hz with less than 0.4% Total Harmonic Distortion @ 14.4 VDC RMS continuous power driven into 2 ohms 250 watts from 20 to 250Hz with less than 0.6% Total Harmonic Distortion @ 14.4 VDC Dynamic power rating (IHF-202 Standard) at 300 watts minimum load Signal-to-Noise Ratio Greater than 80 dB Frequency Response 20-250 Hz +0, -1 dB Damping Factor
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LIMITED TWO YEAR CONSUMER WARRANTY ® Directed Electronics, Inc. (DEI ) promises to ULAR PURPOSE, AND WARRANTY OF the original purchaser, to replace this NON-INFRINGEMENT OF INTELLECTUAL product should it prove to be defective in PROPERTY ARE EXPRESSLY EXCLUDED TO workmanship or material under normal use, THE MAXIMUM EXTENT ALLOWED BY for a period of two years from the date of LAW, AND DEI NEITHER ASSUMES NOR purchase by the dealer as indicated by the AUTHORIZES ANY PERSON TO ASSUME date code mar
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OTHER PRODUCTS AVAILABLE FROM: ® • CLASS D MONO AMPLIFIERS ® • 2 CHANNEL AMPLIFIERS • 4 AND 5 CHANNEL AMPLIFIERS • SIGNAL PROCESSORS • TUBE SUBWOOFERS • POWERED SUBWOOFERS • SINGLE AND DUAL VOICE COIL SUBWOOFERS • COAXIAL SPEAKERS • SINGLE AND DUAL VOICE COIL SUBWOOFERS • COAXIAL SPEAKERS • COMPONENT SPEAKER SYSTEMS • SINGLE AND DUAL VOICE COIL DIE-CAST SUBWOOFERS • COMPONENT NEODYMIUM SPEAKER SYSTEMS • SINGLE AND DUAL VOICE COIL DIE-CAST SUBWOOFERS • HIGH PERFORMANCE POWER CABLES • PREMIUM
