Amp is of good quality construction, some joints in the case/heatsink don’t line up perfectly but no big deal, they’re barely noticeable. The sound is good at it both low and high frequency. I do recommend getting a Ground Loop Isolator if you are installing this using an RCA input. It does take a few seconds for it to turn on after my sterio Headunit is powered on, but that is no big deal. At this price, I don’t know that you could ask for more features or quality.