I had bestbuy install my eclipse sub and amp that I had in a previous vehicle. I wish I would have seen this thread first as bestbuy used a $15 line level converter and tapped the rear speakers for signal and it sounds horrible. I saw another thread that suggested the PAC AOEM-FRD24to get the signal from the head unit so I ordered one and have to install it. I guess I should have gotten the reQ to replace the line converter, instead:?: Oh well, if the PAC AOEM-FRD24doesn't help, I'll have to order the reQ. Thanks for posting. I hope to have the subs sounding the way they used to, sometime soon.