Description: The Rockville RPM1870 is an channel powered console mixer with a USB input and Bluetooth. There were a few goals we had when designing this mixer. The first one was it had to have the clearest sound quality with the best quality mic preamps. We manufactured This mixer with Xdr2 low noise mic preamps. These are some of the best sounding mic press on the market. They compete in quality with top brands on the market! The next goal we had was versatility. This mixer has aux sends and returns on each channel so you can route your external effects easily. We also included a built in 24-bit digital effects processor that sounds great! We didn't include 99 effects which all sound The same. Rather we included 16 solid effects that are each useful. You can customize each effect on the FX control section of the mixer. The last goal was to include a built-in amplifier that is powerful enough for your main speakers so that you can use this mixer for large venues with over 500 guests.