OK, this worked for me, and may work for you as well....when I turned my stereo up with a single 8 gauge ground into a 4 gauge distibution block, it would clip. So, I ran two 8 gauge grounds off the same amp (too small for 4 gauge wire) both into the distribution block...problem persisted. Tried to ground both to the engine bay...same thing...so, last resort, ran one 8 gauge to the the distribution block (which goes to the battery) and ran one to the engine bay...never had a problem after that....hope this helps.
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