The all-in-one MM series Portable Monitor Speaker System by Sunburst Gear is compact and features a bi-amplified design with some models featuring a 5¼in. speaker paired with a 1in. tweeter. Ideal for applications ranging from studio monitoring to use as a PA system during live events, the 3-channel speaker system has inputs for a variety of instrument and microphone combinations as well as an aux input for working along with an MP3 player. Each channel has independent volume controls with a 3-band EQ on primary channels or on speaker out. Separate main output control is available on some models. Ranging in weight from 11lbs. to 23lbs., some of the MM series speaker models feature Bluetooth connectivity and a rechargeable battery for up to 20 hours of play time. The speakers are powered by a Class D amplifier and Class V adaptor that is EnergyStar compliant.