I recently purchased this amp to give another run at solid state sound. Although it sounds better than most solid state amps I've purchased in the past, it still doesn't do it for me the way tube amps do. So. I am the second owner, and I believe this to be the version that had the gain lowered. In fact I'm sure it is. I can tolerate 10:00 on my shure srh840s. This was originally the standard version, but the original buyer purchased the upgrade kit to turn this into the upgrade version. It has both the stepped attenuator and the silver knob. It's in excellent condition. I'm asking SOLD shipped.













