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Old 31st January 2005, 11:40 PM   #1
diyAudio Member
Join Date: Jan 2005
Location: Minneapolis, MN
Default bypass active car speakers w/ head unit amp or try and send signal through pre-outs?

A car with stock, active speakers (each has a dedicated clarion amp) also has an amplifier in the aftermarket Alpine car stereo (50 x 4). Result: the signal is amplified twice and so the volume knob is much too sensitive--three clicks away from zero and it's already too loud. (A) Is there a way to use the sub-woofer output on the head unit to send a non-amplified signal to the car speakers? Or, (B) should I just forget using the clarion amps of which there are four and rely on the amplifier in the head unit? If (A) is possible, then would it also be possible to use the car stereo amplifier to power a subwoofer, since the speakers are being run by their own amps? Any help solving this dilemma is appreciated.
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Old 1st February 2005, 05:27 PM   #2
arcom is offline arcom  Croatia
diyAudio Member
Join Date: Dec 2004
Location: Croatia, Rijeka
If your car stereo has preamp outputs for front/right channels, connect them to the inputs of your Clarion speaker amps. If not, you can put a resistor (say, 100K) between the car stereo's outputs and amplifier inputs.

Running a sub from car stereo is not a good idea because of its low power (those 50W are actually around 20W RMS, if not even lower) and you can ruin either your sub or car stereo or even both.

Hope this helps.
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