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<blockquote data-quote="rc10mike" data-source="post: 5353276" data-attributes="member: 582283">Yet another chapter in my noise problem book....So I get my new AX3200D today. It sounds great and is a heck of a lot more efficient than my AX2000.I was playing some 20hz stuff today just to test it out. I immediately noticed that the tweeters would squeal at high volumes.This is the only clue so far,&quot;Don&#039;t connect all of your amplifier ground wires under one bolt. Contrary to belief, this is not required if the rest of the system is installed properly. If you do connect more than one power ground wire under a single bolt, you run the risk of amplifier ground modulation. This is caused by the current demands of, for example a woofer amp, modulating the power ground wire of a tweeter amp. This results in a squeaking noise that can be heard over the tweeters whenever bass notes hit.&quot;Tonight I already tried moving the ground of the mid/high amp to 2 different spots..made no difference.I tried muting the front speakers from the HU, no difference.When I disconnect the rca&#039;s from the mid/high amp the noise goes away..</blockquote>

[QUOTE="rc10mike, post: 5353276, member: 582283"] Yet another chapter in my noise problem book.... So I get my new AX3200D today. It sounds great and is a heck of a lot more efficient than my AX2000. I was playing some 20hz stuff today just to test it out. I immediately noticed that the tweeters would squeal at high volumes. This is the only clue so far, "Don't connect all of your amplifier ground wires under one bolt. Contrary to belief, this is not required if the rest of the system is installed properly. If you do connect more than one power ground wire under a single bolt, you run the risk of amplifier ground modulation. This is caused by the current demands of, for example a woofer amp, modulating the power ground wire of a tweeter amp. This results in a squeaking noise that can be heard over the tweeters whenever bass notes hit." Tonight I already tried moving the ground of the mid/high amp to 2 different spots..made no difference. I tried muting the front speakers from the HU, no difference. When I disconnect the rca's from the mid/high amp the noise goes away.. [/QUOTE]

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