> I just put a sub and amp in my car and other than the power light on
> the amp going on and off with the stereo it doesn't do anything.
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>
> Does that sound reasonable to those who know about these things ?
Sure, you would definately hear something if your amp and sub both
work. I dont know what kinda voltage a discman puts out, so I'd set
the gains on my amp all the way down, as well as the volume on the
discman.. Then start turning them up slowly until you hear (or dont
hear) sound.