Ampeg SVT Micro Head Bass Head - 200W/4 Ohms (RMS), solid state preamp, Mosfet power-amp, stereo aux input (can be mixed with main input and be sent to headphone out), 15dB pad, controls for gain, bass, ultra-mid, treble and volume, limiter defeat, chromed corners, switching power supply (worldwide use). Dimensions: 14 x 30 x 25cm (WxHxD)