2. tech-talk
  3. 1381858050

Buzz/hum through speakers

When I turn on my system, I get a buzz/hum through all the speakers. I have everything hooked through my Furman line conditioner. I have plugged my amp directly throught the wall outlet with only speakers attached to the amp and no noise. I have disconnected everything from the line conditioner one by one and only makes the noise when the pre and amp are turned on together. My dealer gave me something called Hum X and when I plugged the Furman into the Hum X, noise still there, it's only when I plug the Hum X to the back of the Furman and plug the amp into the Hum X, the noise is gone. Is there any way to get rid of the noise without using Hum X? If I can't get rid of the noise with Hum X, is Hum X holding back the full potential of the amp?
kalbi23
bigshutterbug
381 posts
 
Try grounding the chassis of the amp to the pre-amp, using a thin piece of 18-22 gauge wire. Wrap the bare wire ends around the head of a chassis screw, then tighten.
Post removed 
dms1
13 posts
 
You should not plug your amp into the Hum X is it is only rated at 6 amps and will restrict your power amp.

Have you tried changing the interconnects from your preamp to your amp? Sometimes a connection goes bad causing the hum. I found many years back a very good source of info on tracking down hum problems were some white papers on the Jensen transformer website.

If nothing else works you may have to change power conditioners. I have had good luck with several Furman conditioners but when I tried several other brands in my home theater system I got hum. Sometimes you just have to experiment.

Good luck.
kalbi23 OP
58 posts
 
Ok, here is where I am at. I have 4 sources plugged into my pre, a PS3, TV, Oppo HDMI and Oppo analog. I can leave the TV plugged in via HDMI, but I have to disconnect the HDMI for the PS3, Oppo HDMI and Oppo analog for the buzzing to go away. Does this mean the pre is bad or do I need new analog and HDMI cables? Thank you guys for all your help.
zd542
5,339 posts
 
Call The Cable Company (www.fatwyre.com). They're very good with these type of problems. If they recommend something, they will let you try it first so you know if its the right thing for you. I've been using them for years and find them to be very honest. They should know exactly what to do for you.
More to discover