I had this for a while and never used it.. The only issue I know on this unit is the volume pot not completely turning off when all the way down but that's no issue at all since there is a mute button. MB2 500 • 500 watts @ 4 ohms, 350 watts @ 8 ohms • 10dB pad • Four-band active EQ w/variable contour • Effects loop and tuner output with mute • Headphone/line output • XLR out, pre/post EQ & ground lift switch • Boost footswitch • Two speakon outputs • 10.75x8.5x1.75 I will let it go for $325 shipped! No fee transaction(Money order, etc.) Pics coming up!