I found this amp at Eclipse concert systems in West Saint Paul for $175. I like old gear anyway so this little thing was in the corner and I asked, "What's that?" It has a volume, tone, tremolo knob, and oddly enough, three inputs: low, mid, and high. So the low input is like 1-10, the mid is 11-20, and the high 21-30, for both tone and volume. The tremolo sounds awesome too, just like Bo Diddley!