It could be a myriad of things... but go here for the manuals and install guides.
It looks like you have done research or have been in car audio for a while to know about Autotek. You are correct that the company MAXXSONICS is now making the amplifiers has now for the past year or so takin over MB Quart. The Autotek brand of ampli...
If you want to power car amplifiers using house electricity you'll need a high output power supply since the current draw of amplifiers will overload most available power supplies. The first thing to do is to get the power specifications for the amps...