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Directed Electronics 250d manual

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Table of contents for the manual

  • Page 1

    OWNER’S MANUAL Model 250d[...]

  • Page 2

    © 1999 Directed Electronics, Inc CONGRA TULA TIONS Thank you for choosing a Directed Audio power amplifier . Directed has been the leader in high-quality and innovative security products in the U.S. since 1990. Now we introduce to the car audio industry the same winning formula - products that meet the strin- gent standards of today’ s mobile el[...]

  • Page 3

    1 © 1999 Directed Electronics, Inc T ABLE OF CONTENTS 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 adjust[...]

  • Page 4

    © 1999 Directed Electronics, Inc 2 INST ALLA TION GUIDELINES 1. Please read the owner’ s manual carefully before you install the ampli- fier . 2. Disconnect the battery 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 mount[...]

  • Page 5

    © 1999 Directed Electronics, Inc INST ALLA TION GUIDELINES (continued) 3 is generated. For low impedance speaker applications or restricted ventilation installations, an external cooling fan may be advisable. 9. Y our connections to the amplifier’ s speaker and power terminals should be made with crimped spade lugs, and the battery and ground co[...]

  • Page 6

    4 © 1999 Directed Electronics, Inc 1. GROUND TERMINAL - connect this terminal to the car chassis with a short heavy gauge wire, DO NOT CONNECT TO THE NEGA TIVE TERMINAL OF THE CAR BA TTERY or to factory chassis ground points already occupied by factory wires! If you are grounding multiple ampli- fiers, you may use a high-current distribution block[...]

  • Page 7

    5 © 1999 Directed Electronics, Inc 1. RCA OUTPUT JACKS - use these jacks to route the input signal to another amplifier . 2. RCA INPUT JACKS - accepts line- level outputs from head units or signal sources at voltages from 200 mV to 8 volts. 3. GAIN ADJUSTMENT - controls the gain (input sensitivity) of the amplifier . 4. PHASE INVERT SWITCH - contr[...]

  • Page 8

    6 © 1999 Directed Electronics, Inc SPEAKER WIRING DIAGRAMS Speaker nominal impedance must be at least 2 ohm. Amplifier parallels the speaker terminals internally . Single subwoofer connection T wo subwoofer connection Parallel speaker nominal impedance must be at least 2 ohm. Amplifier parallels the speaker terminals internally .[...]

  • Page 9

    7 © 1999 Directed Electronics, Inc CROSSOVER SETTINGS AND GAIN ADJUSTMENT 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 the 250d is only suited for subwoofer applications, the low-pass crossover is active at all ti[...]

  • Page 10

    8 © 1999 Directed Electronics, Inc SPECIFICA TIONS RMS continuous power driven into 4 ohms from 20 to 250 Hz with less than 0.4% T otal Harmonic Distortion @ 14.4 VDC RMS continuous power driven into 2 ohms from 20 to 250Hz with less than 0.6% T otal Harmonic Distortion @ 14.4 VDC Dynamic power rating (IHF-202 Standard) at minimum load 125 watts 3[...]

  • Page 11

    9 © 1999 Directed Electronics, Inc Directed Electronics, Inc. (DEI ® ) promises to the original purchaser , to replace this product should it prove to be defective in workmanship 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 product PROVIDED the product[...]

  • Page 12

    • SINGLE AND DUAL VOICE COIL SUBWOOFERS • COAXIAL SPEAKERS • COMPONENT SPEAKER SYSTEMS © 1999 Directed Electronics, Inc • Vista, CA 92083 • All Rights Reserved G45012 9/99 Always use a DEI is a proud member of • CLASS D MONO AMPLIFIERS • 2 CHANNEL AMPLIFIERS • 4 AND 5 CHANNEL AMPLIFIERS • SIGNAL PROCESSORS • SINGLE AND DUAL VOI[...]