Roland CM-30 Cube Active Monitor SpeakerThe Roland CM 30 CUBE Monitor puts great sound where you need it! This compact, convenient monitor pumps 30 watts of power through its robust 6. 5" coaxial 2 way speaker, giving you a perfect sound source for smaller gigs; you can even use it as an acoustic guitar amp! The CM 30 CUBE Monitor includes three channels, XLR and 1 4" inputs, auxiliary inputs for plugging in music players and other peripherals, and handy front panel volume and EQ controls.