I installed my MD 1200.1. Not too impressed. Knobs feel cheap and wobbly. The manual says use 5 gauge power/ground. My 4 gauge fit with ferrules I use them anyway but I don't see a quality 4 gauge fitting without them unless you are good at twisting wire tight or shave some strands. I had to crank my sub control from +3 to +8 and the gain near half just to appear as loud as my JBL GTR amp. The amp is twice the rms as my sub so wasn't cranking it and the fan turned on I can hear it over the music which is annoying.. Likely will put my JBL back in and save for a better amp that has a high pass/subsonic.