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Filter tweak for digital backwash?

As my system improves, it’s easier to hear anomalies. The search is now on for a tweak to filter only digital backwash in my AC. The culprit is the regulated transformer power supply (120vac/19vdc converter) to the dedicated laptop for streaming.

The balanced power conditioner has separate outlets for analog and digital. The digital outlets already have built-in filtration for backwash. They work well. But, I need even more. When the laptop is running on its internal battery, the music is very smooth. Unfortunately, the battery life is short. When the laptop is running on the power supply, there’s a slight stridency. When the power supply is plugged in anywhere else, there is huge stridency. So, I’m looking for some gizmo to clean up the digital backwash in-between the conditioner digital outlet and the power cord to the regulated power supply.

I’m not looking for an overall line purifier. The balanced power conditioner does a pretty good job already. Any suggestions?


steakster

Showing 2 responses by shadorne

shadorne's avatar
shadorne
7,490 posts
 
@steakster 

Noise is a very interesting phenomenon. You can think of it like the canvas of a painting. Just like a different canvas texture or tint could change the visual perception of a painting so too can noise with music or sound. 

Vinyl may be attractive because of the inherent high noise floor and listeners are able to use that background noise to advantage!

We can hear at least 15db below a noise floor!

Sometimes noise will help make some aspects of music more audible. 
shadorne's avatar
shadorne
7,490 posts
 
Try another mains filter between your PC and the regulated power supply. Monster make some good ones less than $200. Also try to find out which device is picking up the backwash - is it the DAC or preamp? (Add the extra filter in be tween regulator and device you suspect is being affected)
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