valutazioni - 2, GPA: 5
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The FLAT setting is used for full-range or mixed stereo/mono applications. FIGURE 2—AMPLIFIER CONTROLS 4. BASS EQ -(model 500 only) these switches activate an 8 dB bass boost circuit. Use as necessary for low frequency enhancement. 5. CROSSOVER FREQUENCY - controls the frequency range of the amplifier. Each half of the amplifier can be set independently for optimum performance. 6. 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 © 1999 Directed Electronics, Inc SPEAKER WIRING DIAGRAMS Stereo operation Mono operation For bridged two channel operation as shown in this diagram, connect right channel RCA cables to the “Front” inputs of the amplifier, and left channel RCA cables to the “Rear” inputs of the amplifier. For summed subwoofer applications, connect RCA cables per the input jack marking. Simultaneous stereo/mono operation (two channel shown) © 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 model 200 500 RMS continuous power per channel, All channels 35 75 driven into 4 ohms from 20 to 20,000 Hz, with less watts watts than 0.08% Total Harmonic Distortion @ 14.4 VDCC RMS continuous power per channel, All channels 50 120 driven into 2 ohms from 20 to 20,000 Hz, with less watts watts than 0.1% Total Harmonic Distortion @ 14.4 VDC RMS continuous power, 2-channel operation, bridged 100x2 240x2 into 4 ohms from 20 to 20,000 Hz, with less than watts watts 0.1% Total Harmonic Distortion @ 14.4 VDC Dynamic power rating (IHF-202 Standard) bridged 250 600 into 4 ohms watts watts Signal-to-Noise Ratio Greater than 95 dB Frequency Response 20-20,000 Hz ± 0.5 dB Damping Factor @ 4 ohm Greater than 200 Crossover Switchable high or low pass 12 dB/octave, continuously variable from 50 to 500Hz Bass Equalization +8 dB, centered at 40Hz (model 500 only) Input Impedance 20K ohms Input Sensitivity Variable from 150 mV to 8 volt Output Impedance 2 to 8 ohms, stereo 4 to 8 ohms, bridged Supply Voltage 10 to 16 VDC Fusing and Power 25A 50A Cable Requirements (AWG) #12 #8 (Per amp, trunk mounted) © 1999 Directed Electronics, Inc LIMITED TWO YEAR CONSUMER WARRANTY Directed Electronics, Inc. (DEI®) promises to the original purchaser, to replace this product should it prove to b...
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