This is a GK backline 250BL head, 125W@8ohm, 1 kHz. 1/4 jack, Clip LED, 10dB Pad, Mute Switch and Mute LED. "B" LED, Gain and Level Controls. Level Control. Adjustable Contour. Bass Specific Series Four Band Active. Boost and Master. XLR, Ground Lift and Pre/Post Switches. Send, Return and Tuner Out. One 1/4" jack. 12lbs. 3.5"Hx17"Wx8.25"D. Its a good little amp, very good as a biamped treble end amp, it also has built-in distortion, and it sounds pretty good! I am asking 175 dollars plus shipping! Thanks for looking!