Need HELP - getting static noise when using my tube preamp while computer is on...


HI everyone. I have an issue when using my Cary Audio tube preamp (SLP-98) and I have my computer running. I have random static noise going through the preamp when my computer is running. Im guessing its EMI, but there’s no way to distance my computer from my preamp in my current space. Using different tubes, interconnects and power sources (wall plug vs. power conditioner) hasn’t helped. If I turn the computer off the static goes away.

Is there a way to reduce or eliminate this interference so I can play PC FLAC files through my tube pre without getting random static? The rest of my setup is an RME DAC, MF M6s PRX power amp, and Tannoy XT8f towers.
galacticmayan

Showing 3 responses by lowrider57

And RFI is airborne. Computers and routers fill your home with this noise. Electrical and audio wiring can act as antennae for RFI.

The computer needs to be on a separate circuit than your audio system.

It's probably RFI. How is the computer hooked up to the preamp?

Does your power conditioner have RFI/EMI filtering? Only use it for the preamp and audio components.


https://www.bhphotovideo.com/c/product/379130-REG/Furman_PST_8_DIG_PST_8_Digital_Power_Station.html

It doesn't specifically state RFI/EMI filtering. 

My next suggestion was going to be to add a second RFI/EMI filter to your computer hookup. There's so much noise generated by a computer, it's adding noise to the mains which is shared by your audio.