>p>The JBL® CSMA series of Mixer-Amplifiers are a professional tool with a sleek industrial look that is designed and built for commercial sound applications. Utilizing Crown's DriveCore technology enables significantly reduced size and weight - all mixer/amps are highly efficient fanless and just 1U rack space high. There are both single channel and two channel models with four or eight mixer channels respectively.>/p> >p>The CSMA mixer/amps offer unmatched ease of use with a clean front panel featuring only volume controls for each channel master volume adjustment adjustable bass and treble controls and a power switch. All the volume controls are surrounded by an illuminated ring making them easy to see and operate in darkened environments. The amplifier can drive 8 ohm and 4 ohm loads and can be used with 70V and 100V distributed audio systems without the need for a separate transformer. In addition to balanced mic/line inputs unbalanced RCA inputs and speaker connection