Here we have a vintage Kalamazoo Bass 30 tube amplifier! This is a 2x10” combo with a sealed back, 30 watts, and 7591 power tubes. It has a flip-out control panel with dual inputs, a volume control, bass control, and a combination on/off/treble control. The amp has medium volume, just loud enough to play with a drummer, but a very good tube tone. It’s actually a pretty solid guitar amp too, driving quite nicely when pushed. It has seen service internally and has a modern grounded 3 prong power cable. The exterior is in nice shape overall with some light wear and a nice patina.