2. amps-preamps
  3. 1098390944

Hum or buzz through speakers

I just turned over my system from all B&K to Audio research and McCormack. I was running the Audio Research through the B&K until Monday when I put the McCormack DNA-1 in place. I am hearing a hum or buzz through my Vandersteen's audible from three feet away. Preamp is ARC SP9MK2. Tubes are 6922 Golden Dragons which I am going to change over to some Amperex 7308 USN-CEP. Would this be tube noise that perhaps the McCormack is picking up where the B&K did not or is there something in the McCormack amp that would cause this.

Eagleman
eagleman6722

Showing 4 responses by eagleman6722

eagleman6722 OP
217 posts
 
Well,
I changed preamps from the ARC to the TAD-150. The hum or buzz was fairly low and not audible unless I got right near the speakers. When I hooked up the TAD-150 I could hear the hum and buzz from across the room. I unhooked the IC's and it seems to appear when the preamp IC is connected. Sounds like the 60HZ that newbee was talking about. Any other Ideas. This pre sounds fabulous but, I can't block out the noise.....

Eagleman
eagleman6722 OP
217 posts
 
Thanks Newbee, i will give that a shot....
eagleman6722 OP
217 posts
 
Well newbee, that didn't work. ny other ideas are welcome.
eagleman6722 OP
217 posts
 
Well guys, I tried everthing that i could think of and finally took the TAD-150 to a local hi-fi outlet to see if the buzz and hum was present on their systems. Turned out that the same noise was present there so i will be sending back to Bizzy-Bee to repair. Meanwhile i will run my ARC P9 MK2 with the Amperex tubes and wait for the TAD. The only noise I get with this combo is a slight hiss or buzz when i put my ear right next to the speaker. Seems minor. Anyway, thanks for the advice....
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