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<blockquote data-quote="cinergi1" data-source="post: 373099" data-attributes="member: 552140">The whine is not coming from the stock bose system but started when I installed the new JL Audio Amp.&nbsp; I had already done exactly as you recommended as far as running the wires is concerned.The bose system has all of its wiring running together. My friend who owns a car audio shop and builds competition setups helped me run the power wire but for some reason we ran it along the bose wiring instead of on the opposite side of the car.&nbsp; If I had known this is one of the causes of alt. whine I would have said something. What amazes me is he didn&#039;t say anything.Can you define low level, high level, speaker level, line level, and differential for me?&nbsp; This was my 1st amp install and I am very new to all of this. When I set the input voltage to low everything sounded like crap. When I set it to high everything sound the way it should. Does this mean the bose h/u puts out a high level signal (I was told it put out differential (whatever that means) because in the wiring diagram of the bose system there is a graph that flucuates between +1 and -1)</blockquote>

[QUOTE="cinergi1, post: 373099, member: 552140"] The whine is not coming from the stock bose system but started when I installed the new JL Audio Amp. I had already done exactly as you recommended as far as running the wires is concerned. The bose system has all of its wiring running together. My friend who owns a car audio shop and builds competition setups helped me run the power wire but for some reason we ran it along the bose wiring instead of on the opposite side of the car. If I had known this is one of the causes of alt. whine I would have said something. What amazes me is he didn't say anything. Can you define low level, high level, speaker level, line level, and differential for me? This was my 1st amp install and I am very new to all of this. When I set the input voltage to low everything sounded like crap. When I set it to high everything sound the way it should. Does this mean the bose h/u puts out a high level signal (I was told it put out differential (whatever that means) because in the wiring diagram of the bose system there is a graph that flucuates between +1 and -1) [/QUOTE]

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