I know this is really late, but I just came across this post now. Maybe this will help, somehow...
I had the same problem with my 5350SE. In fact, I returned two different units to my dealer because they were humming. The third one was fine for a few months, but then began to hum. It didn't seem to affect sound quality, but was really annoying, especially during softer passages or when using headphones.
I too thought the problem was in the wiring of my (rented) house. I plugged the amp into every different outlet, and it seemed to hum louder in some than others; in one or two it seemed not to hum at all. Worse, the hum wasn't even consistent; sometimes it would hum from the moment I powered on the amp, other times it would start to hum after being on for a while, and still others it wouldn't hum at all. But after a while the humming became more frequent.
I bought a Brick Wall surge protector/line conditioner. This didn't help with the hum, and convinced me that the problem wasn't in my house's wiring. I called up the dealer again (who claimed that neither of the amps I'd returned had hummed in the shop), who suggested that I do things like tighten the transformer screw under the amp, etc.--none of which fixed anything--so they passed me on to Roy Hall directly. Finally, he told me that some of the Creeks had faulty transformers, with too much iron in them (or something like this--I'm no electrician/engineer). So I took the Creek to the Service Bench in Norwood, Mass., and they replaced the transformer in an hour or so. Haven't had a problem since.
And let me add that I *love* the sound of the Creek. I routinely stay up way past a reasonable hour, listening to records on my Grado 60's, unable to make myself stop.
I had the same problem with my 5350SE. In fact, I returned two different units to my dealer because they were humming. The third one was fine for a few months, but then began to hum. It didn't seem to affect sound quality, but was really annoying, especially during softer passages or when using headphones.
I too thought the problem was in the wiring of my (rented) house. I plugged the amp into every different outlet, and it seemed to hum louder in some than others; in one or two it seemed not to hum at all. Worse, the hum wasn't even consistent; sometimes it would hum from the moment I powered on the amp, other times it would start to hum after being on for a while, and still others it wouldn't hum at all. But after a while the humming became more frequent.
I bought a Brick Wall surge protector/line conditioner. This didn't help with the hum, and convinced me that the problem wasn't in my house's wiring. I called up the dealer again (who claimed that neither of the amps I'd returned had hummed in the shop), who suggested that I do things like tighten the transformer screw under the amp, etc.--none of which fixed anything--so they passed me on to Roy Hall directly. Finally, he told me that some of the Creeks had faulty transformers, with too much iron in them (or something like this--I'm no electrician/engineer). So I took the Creek to the Service Bench in Norwood, Mass., and they replaced the transformer in an hour or so. Haven't had a problem since.
And let me add that I *love* the sound of the Creek. I routinely stay up way past a reasonable hour, listening to records on my Grado 60's, unable to make myself stop.