Effect of power regen/conditioning on video quality

Hi there, there are many recorded observations online of power regenerators (and conditioners) having a positive effect on the image quality in televisions.

There are also many skeptics on this topic, and some who claim that the design of televisions’ power supply and it inherently being a digital signal makes this impossible or very unlikely.

I have experienced an improvement in image quality. It was unexpected (so unlikely to be placebo or confirmaiton bias), but also not sufficiently massive that I tried to keep the TV on a conditioner when split my stereo system (with power plant) from the AV system (no regen/conditioning).

My question is - does anyone (who has experienced this, or have particular knowledge on the subject) understand why it could be feasible fo this to happen? @Paul or others of the PS Audio team, can you explain this in technical terms?

Asking “why” is opening up a can of worms. Just enjoy the better picture quality, and know that when someone tells you the TV can’t possibly be better, you’ll know internally that the picture unquestionably does look smoother & cleaner.

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I’ve experienced this both with a CRT (where you can certainly expect it), with a plasma (where you might expect it less) and with a DLP (where many claim it just can’t happen.)

Warning Handwaving Ahead:

In every real system (which is ultimately analog (at least at the scale we are talking about :slight_smile: )) there is a final transition from the digital circuitry to the analog. Exactly here things like jitter, power supply rejection ratio, etc. matter. Earlier in the digital circuit none of these matter for the integrity of the signal. But right where a pixel is turned on or off, etc. timing matters (relative to neighbors in space, and frames in time. But also any noise on the power supplies can show up in the analog and if that noise is too high you may see fuzz and if that noise isn’t perfectly aligned in time you may see crawl…


Am I right in thinking that the brightness of each pixel on a oled display is done as an analog process, rather than pulse code modulation? If so, then I guess there must be some sort of dac process for each pixel. If this is true then of course a good power feed will make a difference over a bad one.

With LCD it’s the amount of twist applied that defines brightness, is that right? Again this must be an analog controlled voltage change, controlled by some sort of dac process.

After purchasing a Puritan line conditioner for my audio system I plugged my flat screen and sound bar into my old line conditioner and was rather surprised at the improvement in picture quality. Colors were more vibrant along with improved sharpness and detail. Was gong to sell the unit, but it’s going to stay put now.