Just to update this, I never moved my ground to a different place (it's still connected straight to the battery) but I did finally buy and install some distribution blocks so I could install my mini amplifier for the tweeters and run the DSP power and ground to the same place. I installed the blocks and moved the DSP power and ground last weekend and that took care of the generator whine and I installed the mini amp yesterday and that took care of the hissing in the tweeters, I guess that amplifier and these tweeters don't get along because I didn't have hissing when it was in my other vehicle. So now I have two available channels for rear speakers or for a three-way setup down the road. It isn't my prettiest work but it all fits under the dash so it won't even be seen once I get everything tuned and I put the trim back on permanently.
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