(Varghese Devassy) wrote in message . com...
Hi,

I have a SimAudio I5 integrated amp connected to KEF Q7 Speakers. I
notice that there is a slight hum in one the speakers. Any ideas how
this may be caused and could be eliminated. I tried the following with
no difference in the hum

The problem is not in the speakers. They merely reproduce what the amp
sends to them.

My guess is that there's either something wrong with the amp or
there's a ground loop problem somewhere. The fact that the hum appears
only on one channel makes me think there's something wrong with that
channel of your amp. However, I'm not a technician, so that's only a
guess.

Suggestions:

Take amp back to dealer for service

Try: rec.audio.tech

If you want to explore the possibility of a ground loop, search for
"ground loop" in newsgroups and web via Google.com and/or other search
tools.

http://www.google.com/search?hl=en&i...loop%22+stereo

http://www.google.com/search?num=100...+hum%22+stereo

But I think if a ground loop was your problem, you'd hear the hum on
both channels, not one.

1. Provide enough seperation between power cord from the speaker
cables
2. Line filter
3. Interchanged the speakers
4. Tried without connecting any signals to the amp (removed all input
cables)
5. Send mail to SimAudio and they asked me to connect line filter

I had auditioned NAD, Rotel amplifiers and did not see any hum from
them. Also, I find the hum is more in the right speaker.

I am using good quality interconnects and speaker cables (straight
wire). My source is only a CD players and the hum is there regardless
of whether it is on or off

I see the hum in all of their amps such as I5080, I3

I'm not familiar with SimAudio gear, but if all there amps hum, maybe
there's a design problem.

Any ideas please let me kow

Thank you

Varghese Devassy