2. amps-preamps
  3. 1049926137

Newby problem with hum

I'm relatively new to this sick and exciting hobby and need some help from the experts. I am having a problem with hum. I think it's a ground loop issue, but not 100% sure. I get it when I'm switched to CDP and even louder when switched to my LP. I start hearing it when the volume control gets to about 12 o'clock and it becomes quite loud at 3 o'clock. Here's my setup...

Music Hall MMF7 w/ Goldring Eroica MC cartridge
Ah! Super Tjoeb CDP
Kimber Hero interconnects
Manley Stingray Integrated amp
Analysis Plus Oval 9 speaker cables
Silverline Sonatas
Chang Lightspeed line filter

Any ideas would be helpful. If it is a ground issue, where should I start?

Thanks!

Steve
smccull
bowbow
123 posts
 
Actually there is a preamp in this system. It is in the same case as the power amp. I wonder if the integrated amp could be modified/upgraded, or at least checked to see if it is grounded properly or well enough??

Can you upgrade the power cords on these units?
smccull OP
24 posts
 
Thanks everyone for your help, especially Jsawhitlock. I checked out the psaudio site and they have a great hum wizard. As it turned out my phono pre was sitting too close to the amp. I rearranged the configuration as well as put an aluminum shielding jacket on my cables and the hum nearly went away. It's now barely audible when I have it turned up to 3 o'clock, which is passible for now. I'm going to experiment with some better shielded cables since I can't get the components any farther apart in my rack. Hopefully that'll carry me the rest of the way home.

Thanks again!
jsawhitlock
302 posts
 
Smcull, glad to hear your hum problem is corrected, there hum wizard offers some great info!
If your looking for cables try there speaker cable as It's very good, I'm using there Statement and Plus speaker cable for my Logans, I use the Statements for the woofers and Plus for the panels and my system is sounding great. Happy Listening!
smccull OP
24 posts
 
You think the PSAudio cables are better than the Analysis Plus?
jsawhitlock
302 posts
 
Smcull, I have not tried the AP wire but have tried the PS Audio Statements and Plus. I have Martin Logans so I use the Statements for the woofers and the Plus on the panels. I think my speaker wire search is over as I'm very happy with the sound. I also use all Lab II PC, Statement IC and there digital IC. You may consider trying the cables as they offer a 30 trial! What dont you like about the AP wire? The new Statements are the best sounding speaker cables I have tried in my system and I think I'm done with wire for now! Happy Lstening!
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