The KB 4 was designed as a personal PA system in a keyboard amp. The KB 4 features separate inputs on each channel and can easily handle voice microphones and other instruments including acoustic and electrical guitars drum machines and backing machines such as CD and DAT players. Other essential features include stereo effects loop ground lift master level XLR balanced stereo line out DDT defeat switch and the capability to drive an external speaker. 15 inch speaker and tweeter 75 Watts/100 Watts with external speaker Stereo mixer with 2-band EQ and main effects send/return Mic/Line channel with 3-band EQ and effects send/return Monitor input with level control and assign Headphone out with level control Built-in casters and handle for easy moving Great new look and features