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Фрагмент инструкции
This will give you the best sound and signal-to-noise ratio. Besides better sonic reproduction, proper input sensitivity also helps to prolong the reliability span of your amplifier by eliminating excessive internal temperature generated by incompatible source unit output and amplifier input. Note : Turning the input gain UP does NOT indicate MORE power. Just MORE noise. The input gain control IS NOT a power control. REMEMBER that the input gain control has nothing to do with the power output of the amplifier. Figure 14: Input Sensitivity Control 1. Turn the Input Sensitivity Control all the way down (counter clockwise). 2. Set the volume control of the source unit to approximately 2. 3 of its maximum output. 3. Turn the balance control of the source unit to its center position. 4. Leave the tone (bass/treble) controls at their usual position. 5. Play a CD or tape track with wide dynamic range. 6. Use the Bass Boost Control to enhance the bass performance (if desired). 7. To locate the optimum input sensitivity setting, ask the person assisting you to turn the Input Sensitivity Control clockwise until audio distortion starts to develop. Turn the sensitivity control counter clockwise slightly to minimize the distortion. 8. If you constantly switch between CD/tape and radio, you will need further adjustment since radio output level differs from that of CD or tape. In this case, you need to locate a balanced sensitivity setting which is best for both the output level of radio and that of CD or tape. BASS BOOST CONTROL (BOOST) Select a boost level between 0dB and +18dB to enhance the bass performance for your sound system. BASS BOOST is NOT free! Every 3dB of boost costs you twice as much in power. Make sure to set the final gains . . . after setting the Bass Boost to work best with your subwoofer/ enclosure combination. More is NOT always better! SETTING UP & USING REMOTE SUBWOOFER GAIN CONTROL (R S) If you are using the R S control, make sure to take this into account during set-up procedures of the subwoofer amplifier. You should set the system up with the R S plugged in, and with the level knob turned all the way down (counter clockwise). 13 COUSTIC.COM TROUBLE SHOOTING SYMPTOM PROBABLE CAUSE 1. No power Check connections to the amplifier's terminals. Check connection at "+" terminal of the battery. Check the remote turn-on terminal. Ensure it receives power when the source is turned on (or when the switch is turned on). Refer to the Installation Section. Check the fuse: if fuse is blown, replace it; if fuse continues check the power wire and also the amplifier for a short. If the short is in the power wire, fix it; if the short is in the amplifier itself, see your Coustic dealer. Check the voltage at the amplifier, and the remote ON/OFF lead. The voltage should measure between 11 V - 15 V. If the measurement is beyond this range, have the source unit checked out by an authorized dealer. 2. Power without sound with Turn the amplifier off, and Check all input & output signal red power/protect cables and connections. Check the speakers for short with indicator on a VOM (volt meter) or by connecting them to another audio system. After making sure everything is normal, turn the amplifier on again. 3. Power without sound with The continuous red light of the power indicator signals a red power indicator on high internal operating temperature, which results in the amplifier switching off temporarily; when the amplifier cools down to a safe level, the amp will automatically restart. 4. Very low sound from Check your source unit’s fader control. both radio & tape Check the amplifier's Input Sensitivity Level. 5. Frequent automatic This indicates that the amplifier is operating at a continually amplifier shut down undesirable high internal temperature. High operating temperature caused by inadequate ventilation: refer to the sub-section titled LOCATION for better amplifier location. High operating temperature caused by an excessively low impedance load, say below 2 ohms: check for bad speakers and/or electronic crossover, proper passive crossover components; if all else fails, try rewiring the entire system. High operating temperature can be caused by an incorrect input sensitivity level: refer to sub-section titled INPUT SENSITIVITY ADJUSTMENTS for correct setting. 6. "Motorboating": The Check the amplifier's connection to the battery. amplifier power indicator Check battery voltage. If low, recharge or replace going off repeatedly when battery. Check all ground connections. the audio system is on 7. Whining noise when Reroute power cable from battery to source unit directly, engine is running with bypassing the battery terminal in the fuse box. Check noise varying with the power connections to be sure they areclean. Check ground accelerator (noise level connections to be sure the ground wire is in direct contact varies with source unit with the bare metal surface of the chassis (with that spot volume control) scrap...
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