I love this DSP. All the channels work well. It cleaned up my music by a lot. I haven't had one problem with it. The Bluetooth is amazing. I just sit in my garage and tune my system through my phone. I don't know how many feet the Bluetooth works to, but I stood at least 20 feet away while playing with some music to see how I liked the sound and everything worked on point. Muting different channels to focus in on one setting is great. Like the volume, the crossover points, the gains, and the eq on each channel worked like a charm. I waited to do this review to try it out for myself. After having this DSP for a year now I absolutely have no complaints. At this price point sometimes it pays to buy and try something out for yourself regardless if reviews are bad or good. My soul opinion about this DSP is it's the best bang for the buck. I would put this DSP up against any $500 DSP on the market.