Sounds like a ground loop. Try connecting to ground separately or a grounding box. Does this happen only on phono or also higher voltage inputs?
What would cause noise (ground noise?) when touching the volume control and tone controls?
I have a new preamp that I recently hooked up and I'm getting some interference or what may be ground noise but I only hear it when I'm physically touching the metal volume knob and tone controls. When I touch the metal top of the case in addition to the knobs, the noise will subside. Just looking for ideas to help isolate the cause. I think the case itself just isn't grounded sufficiently.
I have tried new power cables, RCA cables and plugging into different outlets with no change.
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@cleeds Ah... it's a "new to me" preamp, but it's a used unit. Fairly new though. @antigrunge2 I don't have a phono setup, just a streamer connected to a DAC and the DAC connected to the preamp. I can reach out to the preamp maker, just wanted to see if I could solve it myself before doing so. :) |
@tubeguy76 This sounds like the controls are not properly grounded and the case may not be either. I would talk to the manufacturer first, since opening it up to solve it yourself will likely void the warranty. |
@atmasphere Yeah that's what it appears to be. I'll reach out to him and maybe he can help me solve it without sending it back for some TLC. |
- 22 posts total