I just received my Nakamichi amp back from being rebuilt at a company called ATE (Auto & Truck Electronics) out of TN. They talked a good game, but the sound quality now is nothing like the factory used to be. It lacks richness and the volume is not nearly as powerful as it was. This is frustrating! I'm thinking about trying another company FCSR (Factory Car Stereo Repair) out of FL. I just don't want to continue throwing more money down the hole on something that won't get me back to that rich, powerful sound I once had. It's really hard to believe that some company hasn't made an easy plug and play replacement amp for our set-up. Every shop I talk to wants to rip everything out and start fresh. I'm sure they do... lol $$$ So, has anyone in here used FCSR?? Thx