MarkBass Mo Mark Amp Frame & Loaded Modules. Now GONE PENDING Great condition - great concept.  Pick and mix your own Input, EQ and Master Module.  I have some other Modules available too in 'other musically related items' This is the 500w Analogue Amp Frame.  Analog power amp 500W @ 4 ohms 300W @ 8 ohms Custom digital power supply Amp Frames include two combo speakon/1/4" speaker jacks, effects loop (parallel), XLR DI out with pre/post EQ switch and ground lif