2. amps-preamps
  3. 1375199393

Preamp Noise with High-Efficiency Speakers

I have Avantgarde Duo Classic Speakers, I hear a very audible buzzing noise whenever I insert an analog preamp. If I run my DAC (AMR DP-777) directly into power amp, the noise disappears. I have tried 4 different preamps (tube and SS), 3 different amps, a bunch of RCA and XLR interconnects, the problem persists. I have tried dedicated power line and two power conditioners (with Multi-wave options) and various high-quality power cords, so far nothing works, and I am forced to run DAC-direct into power amp. The buzz is not very loud but certainly audible enough to be annoying. There's no noise running the same equipment and power source into regular speakers, I am pretty sure it's just the Avantgarde (104dB sensitivity). Please share your solution if you have had similar situations. Thanks!
yingtonggao
charles1dad's avatar
charles1dad
10,250 posts
 
Dentdog,
You were certainly given very solid feedback from Tom32. I believe you'll get this problem solved.
mapman's avatar
mapman
22,226 posts
 
I had hum/noise issues with my phono rig that came to the forefront a few years back when I switched pre-amps and had to add a step up device to match my low output Denon DL103R to the new pre-amp (ARC sp16) phono section inputs. Location/orientation of devices and wires affected the level of hum. The source is most likely nearby power transformers, most likely mostly from teh outdoor heating and AC units on teh other side of the nearby wall. I solved the problem by placing the Electrocompaniet step up device I use inside a cylinder of mu metal foil. Its been dead quiet ever since.

Non of the speakers I had attached were high efficiency which would make the issue even harder to resolve no doubt.
atmasphere's avatar
atmasphere
11,817 posts
 
Dentdog, do you have hum when nothing is connected to the phono section input?
Post removed 
More to discover