dtorc

Responses from dtorc

A persistent hummmm...
Hi all,   My Zesto amp is pretty new - a couple of years old. The hum was there from the start, but my previous speakers didn't emphasize it as much as my new speakers do. As a few folks have said, the efficiency of horn speakers has a down side... 
A persistent hummmm...
So, on my (so far) futile diagnostic journey, I disconnected all input to the amp. and then unplugged them. The amp, with nothing plugged into it, or even sharing the same wall plug, continues to hum. I have to say the builder, George Counnas of Z... 
A persistent hummmm...
Yes - I sent the amp out to the manufacturer/designer, and he said he didn't get any hum at all. Of course, i don't know what speakers he uses, and you are right - the efficiency of the speakers certainly exacerbates any hum problem the amp has. ... 
A persistent hummmm...
Sorry - in the list of things I said that I tried, the cheater plug should have been first. No luck there.   I have changed the inout tubes a few times, and that doesn't seem to affect it. I don't know whether there are quieter versions out ther... 
Open Baffle Experience
Sorry, I discovered this discussion as it is wrapping up. As others have said - I came to open baffle speakers (Emerald Physics 2.8's) through having first many closed box speakers - Linn, B & W, Audio Physics - and also a 12 year stint with M...