mtx amp

Hello i would like to buy a used MTX amp the three im interested in are stated will take a look at the mtx1501d also.. 500 rms at 4ohm is what i need Will be running two mtx 12" 8500 @ 4 ohms each

I have an MTX RT2400X Road Thunder amp which appears to have a short in it somewhere. I originally turned it on without hooking it up to any subs, within minutes, it was hot to the point it was burning my hand. i disconnected it from the power, and when i reconnected it, without even turning it...