The amp is small, light, and fully powers a pair of pioneer 5X7 speakers(~40watt RMS rated) with an 8AmpHour lead acid battery. Using it in a homemade bicycle stereo. I will probably not get a noise citation with it like my larger setup, but it sounds fantastic. It has a low pass, but I don’t want to carry enough batteries to run a sub on my bicycle. After 2 hours at full volume (without clipping speakers) it still sounds great, and isn’t too hot. I believe the 50 watt RMS rating is pretty close to true. I’m happy so far. Hope it holds up to a few bumps.