The sockets in your house could be installed with reverse polarity.
Buzzing sound coming from my amp
I have a Krell KSA-150 amp that's probably about eight years old. I bought it used about a year or so ago.
when I turn it on, I hear a low buzz (barely audible, you have to put your ear to the speaker to hear it) coming through the speakers. The amp is plugged into a power strip that's connected to a switchable outlet.
I use XLR cables between the amp and preamp.
I've been told that it's better to plug an amp directly into an outlet, rather than a power strip, and perhaps not a switchable outlet. I tried this and no difference in the sound.
I'm sure there could be many reasons for this noise, but I was wondering if someone could offer some advice for tests or maybe your knowledge of amps that could help to pinpoint the cause.
Or, is the cause likely in the amp itself and not some external issue with the electrical in my house?
when I turn it on, I hear a low buzz (barely audible, you have to put your ear to the speaker to hear it) coming through the speakers. The amp is plugged into a power strip that's connected to a switchable outlet.
I use XLR cables between the amp and preamp.
I've been told that it's better to plug an amp directly into an outlet, rather than a power strip, and perhaps not a switchable outlet. I tried this and no difference in the sound.
I'm sure there could be many reasons for this noise, but I was wondering if someone could offer some advice for tests or maybe your knowledge of amps that could help to pinpoint the cause.
Or, is the cause likely in the amp itself and not some external issue with the electrical in my house?