Instruction/ maintenance manual of the product 250d Directed Electronics
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OWNER’S MANUAL Model 250d.
© 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.
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.
© 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.
© 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.
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 fact.
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 .
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.
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.
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.
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 n.
• 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 .
An important point after buying a device Directed Electronics 250d (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Directed Electronics 250d yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Directed Electronics 250d - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Directed Electronics 250d you will learn all the available features of the product, as well as information on its operation. The information that you get Directed Electronics 250d will certainly help you make a decision on the purchase.
If you already are a holder of Directed Electronics 250d, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Directed Electronics 250d.
However, one of the most important roles played by the user manual is to help in solving problems with Directed Electronics 250d. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Directed Electronics 250d along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
