Universal stereo mixing amplifier Sing along! The clearly arranged user surface of the SA-230/SW makes listening to music & especially making music really enjoyable. One of the three stereo line sources at a time & three mono microphone sources can be mixed together without any problems. When combined with special karaoke CDs or DVDs, features like "one-touch karaoke" or "vocal partner" are available. An adjustable digital echo can be added to the microphone channels as an effect. The fanless cooling concept of the amplifier ensures a silent operation. The latest protective circuits provide protection against overload, overheating & short circuit. Features 100 WMAX Silent operation due to fanless cooling concept 3 stereo line inputs 3 mono microphone inputs at the front panel, each with gain control Adjustable digital echo for the microphone inputs Karaoke feature Vocal partner feature LEDs for level control & active line inputs Controls for volume, bass, treble, balance & digital echo Stereo record output 482 mm (19") rack installation, 1 RS, with supplied mounting brackets