Dayton Audio DTA-2.1BT2 100W 2.1 Class D Bluetooth Amplifier with Sub Frequency Adjustment

so as usual I was browsing around on parts Express and I found that they had this new amp by Dayton audio the DTA 2.1 bt and this is a cool little app so it's a 2.1 channel app bluetooth the first two channels power the left and right speakers at 50 watts per channel then it has an output for a sub woofer passive subwoofer so it doesn't have to be amplified basically meaning you can take an old speaker with decent bass response and actually use that as a sub because it does have a hundred and eighty Hertz crossover meaning that that sub won't get high frequencies only the sub frequencies I wish that that was adjustable or maybe somewhere closer to 80 Hertz but what can you do for the price it was 79 bucks it has three inputs Bluetooth you have your RCA inputs as well as a 3.5 millimeter input Jack the buttons and dials are real tactile and for some reason it's really satisfying it has l