Gravity GBR300.4DM True 600-Watt RMS Micro Ultra Compact Digital 4-Channel Full Range Amplifier with RCA Stereo Input - IPX65 Waterproof - Perfect for Motorcycle, RV, ATV, Car, Boat, Marine

Great sound quality and loud. More than I expected

Seems well put together. Only complaint is that the acrylic over the settings cracked very easily. But overall a nice product so far.

This amplifier is incredible good power and a good size also easy insulation connections have named location for DYI I have six. 6 x 9‘s and 4 bullet tweeters I am running the amplifier at 2ohm stable Power and am loving it .ground and power Cable could be a little longer but was easy to extendThis amplifier doesn’t run hot just gets warm The top review was just before I did 800 miles plus on 80% volume and I am impressed and I will buy again 9/3/18

Amp is very poor quality. ZERO output for rear channel, verified input signal, but no output the rears. Now I have to wait TEN DAYS for a replacement and a ripped apart bike. Trash… GOT THE REPLACEMENT and guess what?!!!? It’s GARBAGE too! This has adjustment pots that are broken, unstable output and the gain settings drift. This was made by idiots and intended to scam customers. STAY AWAY from this absolutely poorly made trash

Bought to push my wetsounds rev 10's. Had my power level at 90% for over 30 min with no issues. Great product!!!

i put this in in the fairing on a 2013 ultra classic and it made my speakers rock but one channel went out within a year

Perfect size to fit in my 2012 street glide. Very satisfied

No issues with amp running three months now