The Rockville RPM870 is an 8 channel powered console mixer with USB input. 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 pre’s on the market. They compete in quality with any brand 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 built in a 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 in 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 events with over 500 guests. We tested this and we ran the mixer to (2) Mackie C300Z speakers, and even with the volume turned up half way these were filling an extremely large room with sound! We also tested these with dual 15” DJ speakers and really cranked them and the sound of the highs and lows were crisp and clean. The great thing about this is the amp does not overheat even when cranking it for hours straight. The power amp built into this mixer is 500 x 2 RMS @ 8 ohms and 750 x 2 RMS @ 4 ohms. We rate the RMS very strictly the way famous brands like Mackie rate their items. We also supply you with program and peak ratings but RMS is the true continuous output power you should look at. Other great features are a dual 7 band master EQ, a 4 band EQ on each channel, an EQ kill switch, and pad and solo buttons on each channel. Rounding things out, we added a USB input that has 2 functions. It can play back your audio tracks. But what is really cool is that you can record your main mix onto the USB!