Yamaha Vintage 115B Bass Combo Amp HUGENotes Amp has a persistent hum that does not change volume as the volume knob is turned Amp sounds good and functions properly other than background hum Local pickup only A Yamaha Vintage 115B Bass Combo Amp HUGE in Good condition! At Evolution Music, we attempt to highlight cosmetic defects (if any) by picturing every angle of every piece of gear so you know exactly what you are getting. We always picture any and all accessories too. What you see is