Yamaha 680W STAGEPAS600B Portable PA System with Bluetooth. 680-watt, portable PA system with 10-channel powered mixer, two 10" speakers, a Bluetooth input, SPX digital reverbs, an onboard feedback suppressor and versatile EQ. 680W (340W + 340W) Power Output. 10" Woofer / 1.4" Voice Coil Compression Driver. Detachable 10-channel Mixer (4 mono/line + 6 mono / 3 stereo line). Bluetooth Audio Streaming. 1-Knob Master EQ with Virtual Bass Boost. High Resolution SPX Digital Reverbs. Onboard Feedback Suppressor. Great-sounding 3-band Channel EQ. Switchable Stereo / Mono Inputs. Hi-Z (high impedance) Inputs. Phantom Power. Monitor and Subwoofer Outputs. Optional Reverb Footswitch.