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Hersteller: Directed Electronics Dateigröße: 185.44 kb Dateiname: Unterrichtssprache:

Refer to the installation guidelines and specs page for proper gauge of wire. YOU MUST PROTECT THIS WIRE WITH A FUSE or circuit breaker located close to the battery. 4. POWER FUSE - protects the amplifier against electrical damage. DO NOT REPLACE THE FUSE OR FUSES WITH LARGER AMPERAGE FUSES ! If the fuse(s) blows, check your system for wiring problems or see your dealer. 5. SPEAKER OUTPUT TERMINALS connect the speakers to these terminals. Refer to the speaker wiring diagrams (pg.6) for different wiring options. 4 © 1999 Directed Electronics, Inc AMPLIFIER CONTROLS Refer to Figure 2 for details. 1. RCA INPUT JACKS - accepts line- level outputs from head units or signal sources at voltages from 200 mV to 8 volts. High-grade shielded or twisted pair RCA cables are recommended for this input. 2. GAIN ADJUSTMENT - controls the gain (input sensitivity) of the amplifier. 3. CROSSOVER SELECTION SWITCH controls the type of filter for the onboard active crossover. LPF setting is for low-pass (subwoofer) output frequencies, HPF is for high-pass (mid-bass/midrange) outputs. FLAT is used for full-range or mixed stereo/mono applications. FIGURE 2—AMPLIFIER CONTROLS 4. LED INDICATOR - the green Power LED lights to indicate normal operation. The green LED will shut off to indicate amp shutdown due to short circuit, DC offset, or over- current conditions detected by onboard protection circuits. Thermal protection is also indicated by the green LED shutting off. 5. CROSSOVER FREQUENCY- controls the frequency range of the amplifier. 6. BASS EQ - this switch activates an 8 dB bass boost circuit. Use as necessary for low frequency enhancement. © 1999 Directed Electronics, Inc SPEAKER WIRING DIAGRAMS Stereo operation Mono operation Simultaneous stereo/mono operation © 1999 Directed Electronics, Inc 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. • For full-range and simultaneous stereo/mono bass applications, the crossover selection switch should be set to "FLAT". If the amplifier is driving your subwoofers, set the switch to "LPF", and for mid-bass/midrange output, set to "HPF". • The crossover frequency control needs to be adjusted to suit your particular system. For subwoofer applications, try and keep the setting low enough to prevent image smearing (you should not be able to hear male voices from the subwoofer) but not so low as to create a gap between the subwoofer and the mid-bass/midrange speakers. For mid-bass/midrange settings, try to keep the setting low enough to keep your sound stage in front of you, without overdriving the speaker. It will be to your advantage to spend some extra time with this adjustment, listening to familiar music or system set-up discs to achieve the kind of musical reproduction that you prefer. • The gain adjustment allows you to set proper signal match for clean, quiet amplifier operation. For full-range and simultaneous stereo/mono bass applications, start by playing some music you are familiar with. With the gain adjustment on the amplifier in the middle of its rotation, bring up the volume on your head unit to the 3/4 volume setting or until you start to hear distortion or clipping. If you hear distortion before you reach the 3/4 volume setting of your head unit, reduce the gain setting on the amplifier and start to raise the head unit volume again. When you can listen to the music at or slightly above 3/4 on your head unit without audible distortion, slowly raise the gain of the amplifier until distortion is heard, then back off the gain until the distortion is not audible. This setting will allow you to reach full output with all but the quietest of source material, while avoiding excessive noise in the system. • The same procedure should be used for adjusting the amplifier when the on board crossover is set to LPF or HPF, but you will also have to take into consideration the effect that gain adjustment has on system frequency response and imaging. Again, plan on spending some time with music that you know getting the gain and crossover settings the way you like. Test discs and analyzers may help with this process, but in the end it's your ears that count - listen to the music ! © 1999 Directed Electronics, Inc SPECIFICATIONS 150/250/400 model 150 250 400 RMS continuous power per channel, both chan 50 75 125 nels driven into 4 ohms from 20 to 20,000 Hz, watts watts watts with less than 0.08% Total Harmonic Distortion @ 14.4 VDC RMS continuous power per channel, both chan-75 125 200 nels driven into 2 ohms from 20 to 20,000 Hz, watts watts watts with less than 0.1% Total Harmonic Distortion @ 14.4 VDC RMS continuous power bridged into a 4 ohm 150 250 400 load from 20 to 20,000 Hz, with less than 0.1% watts watts watts Total Harmonic Distortion @ 14.4 VDC Dynamic power rating (IHF-202 Standard) 200 325 5...

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