Rear Amp cause Battery Drain?
 

Had a neighbor who is a electrial tech diagnose my 98 mustang. I had the sit for a few days and battery would drain problem. We tested various issues and found the rear passenger side amp would draw power. My question is, is that something others have had issues with? I unplugged the amp and have had no issues, but want to see if that is something other people had issues with. I am wondering if anything else would be in that line I unplugged going back to the amp that could be the culprit instead of the amp.

Thanks for any insight.