I have (sorry, had) a bit of a gain issue (too much) on my valve preamp. All the volume was in the first 1/4 turn. In addition I had a tranny hum - which I couldnt get rid of. Was audible about 2 foot from speakers. Anyway, was browsing through a hifi mag the other day and stumbled across an ad for Rothwell In-line attenuators. The text of the ad seem to paraphrase my symptoms almost verbatim. I hadn't heard of these things before and there are probably gizmos out there that do the same thing - I didn't look. Having spent a few $K recently on a lot of new kit, I thought the 39 pounds asking price wasn't a lot to pay if they did what they claimed. So I ordered them last Sunday arvo from the UK, they arrived on my desk in Australia before lunch yesterday. Plugged them in this morning. Best 39 pounds I have spent. Tranny hum is all but gone. I have to stick my ear next to the cabinet to hear anything. And the volume control now works like it should. I don't know what's inside them or how they work - don't care. They just work. I'm a little sceptical when I read such claims in print I must confess, but when I find a product that does exactly what it claims, I think it deserves a plug. http://www.rothwellaudioproducts.co.uk/html/attenuators.html. As always YMMV. BTW the 39 pounds included shipping via airmail (or space shuttle or what ever they used to get them here so quickly).