the bold is what I was questioning when 12V Guy was kind enough to call me today to discuss my issue with the feedback noise. he also suggested that we maybe disconnect the 8 pin connector and that cut power to sub amp, I dont have an issue doing that I just dont want to kill the amp that powers the front and rear speakers, but 12V Guy said they are powered off the head unit, not to question him, but I was under the assumption that that isnt the case......Interesting. Running a Y wasn't mentioned to me on the phone. Should I try to find a Y adapter to run both the T-Harness RCA and my aftermarket RCA's on the subwoofer channel on the deck? Wouldn't that cause issues with trying to dial in the aftermarket sub amp since it would also then be controlling the door subs?