Epiphone EBM-4CH Active 4 String BassNotes Pots are attached to circuit board. Pots were extremely dirty when we purchased this for resale. They've been cleaned with contact cleaner but still have a bit of scratchiness. Recommendation would be to replace them but the bass is functional as is. One knob has been replaced and looks a bit darker than the others. A Epiphone EBM 4CH Active 4 String Bass in Very Good condition! At Evolution Music, we attempt to highlight cosmetic defects (if