This one is something that I have just run into recently. After replacing the factory headunit with an Eclipse AVN2454 and adding a JVC Arsenal KS-AR8001D the car has not only dimming problems, but has idling problems as well. At normal listening levels everything seems to be fine, but when the volume gets turned up to about 70-72 of 80, the protection light turns on, on the amp and then the radio shuts off and back on quickly. The AVN then shows its welcome screen and starts back up. While the protection light on the amp flickers, it seems to have enough power to continuously play, and if the car is kept up to about 2000 rpm, everything will still play. When the car is about 2000 rpm and the volume is at 70, the idle of the vehicle will drop to about 1750 to 1500 rpm depending on the strength of the bass note. While this would make me suspect that the alternator is not enough to support the amplifier, I don't remember having one amplifier drawing that much current that it would cause that much havoc on the electrical system.
The amplifier is adjusted with its bass boost turned down and the gain at about a 4-5 volt input (hard to tell exactly where its at since that the amp only marks it at min and max), the only reason that I can guess that is because the instruction book claims input gain between 0.3 and 6v and it is adjusted to about 1/3 of the way up. It is crossover point is at about 80-90 Hz (only a guess again because it only marks 30Hz and 500Hz). I even wired the subwoofer that it is attached to 8 ohms. The sub is a Rockford Fosgate P3 10" in a normal hatch/wedge type of sealed box. I know that the output of the stock alternator is about 90amps and adding this amp would put it past its duty cycle, but the techs at Honda claim that adding this one amp shouldn't cause a problem in the electrical.
The one other thing that I forgot to mention was that the original radio had the factory amplifier that was bypassed, in which the customer lost the factory sub. We have already tried to replace the JVC amp, and that seemed to have very little effect. Tested the resistance of the ground wire to the negative terminal and had
Does anyone have any ideas on what the possible problems could be besides the factory's inability to keep up with the electrical demands that the JVC amp is putting on it because the techs at Honda is saying that it is not really a probability.
