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  • Getting rid of noise, Line-Active UPS System or Isolation Transformer

    Posted by justinhauslaib on April 19, 2022 at 8:17 pm

    I recently bought a new computer for my home theater. When I connected it I had a lot of noise. Seemed like it was directly corresponding to the GPU workload. At this point my TV, AVR, XBOX and Playstation were all connected to a power conditioner/sequencer from Monoprice from a single plug in the wall. Then on the opposite side of the room, my Crown amp and MiniDSP were plugged in to another wall outlet. All on the same breaker.

    After doing a little research, I tried connecting all directly to the Monoprice on one outlet (so I added the Crown amp and DSP all to one plug) This made a difference and things got quieter. But the GPU of the computer was still very audible. All of the noise seemed to come from the subwoofers connected to the Crown amp.

    I then ran an extension cord to another room and put the PC on that by itself, basically isolating it from the entirity of my home theater. This all but eliminated all noise issuses.

    I cant have cords all over the place and dont want to run new power lines through the walls. So I did more research and what I came to was either a “Line-Active Uninterupted Power Supply” basically a battery back-up or an isolation transformer. The line active UPS system was the cheaper of the two so I ordered that for around $170 from amazon.

    As usual. A few moments later I read on Audioholics Patreon community chat area that the UPS System wasnt that great of an option because you have to basically replace it every 3-5 years.

    I also read somewhere else that the isolation transformer can introduce noise of its own. So I’m wondering if anyone is familiar with these, and what’s the best option? Is there a better option?

    justinhauslaib replied 1 year, 5 months ago 1 Member · 0 Replies
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