This amp needs to have the gain 1 knob/board replaced. Otherwise the gain is maxed out and you have a natural distortion on your bass. It is a 70 dollar part plus shipping, needs to be ordered right from Mark bass. Otherwise is in great working condition. All other components are active and functional. Got a nice combo amp and don’t want to spend the time or money to order the part. At the listed price it is still 500 dollars cheaper than a used functional one. If you want to spend the time to order the part it’s a great deal!!
Mark Bass Markbass Little Mark Tube 800 Compact Tube Bass Amplifier Amp Head for Sale