amplifier staying on after car off

Hey all you smarter audio experts, I have an issue with my 3 month old amplifier. It is staying on after the car is shut off draining my battery. Took me 3 hours to figure out why my batt was low or dead after long periods. What would cause this problem? Anyone have any ideas please feel free to school me on amplifiers. It is an Earthquake sound TNT T2000wd1 mono class d amp. Was and still runs when i put the fuses in it. Perhaps there is a way to plug and unplug it better than pulling fuses every time I get in and out of car. Not currently doing that but I am considering it. If it was simpler to un-power it I would do it. I can send it back to Earthquake for repairs but before I do that I would like to see if anyone has any answers or thoughts on the issue?? THANK YOU Feller2198' civic

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