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Your recent posts about power supply for TV receiver inspired me to finish a similar project I'd started. I've had a Kingrex PSU powering my Cisco Uverse box for a couple of weeks now and results are quite positive. I followed your recco on the DH Labs wire, and scored connectors from Arrow to build the umbilical. The Kingrex was leftover from a previous application and was just gathering dust. Improvements in audio were immediately noticeable. The whomp, whomp, one-note bass was gone. Taughter/faster bass, and dialogue is easier to discern. The pic on my Pio plasma was pretty freaking good before, but on some material the reds seemed at times over saturated. Not any more, at least I've not witnessed it since ditching the wall-wart. All in all I'm very pleased with the change. Your find of the Zerozone PSU makes this an even more affordable tweak. The Kingrex has gone up in price a bunch since I bought mine and surely couldn't justify buying a new one for this project. The Zerozone looks like the ticket for others that might want to upgrade the PS on their video rig.
Again, thanks for doing so much of the leg work.
Follow Ups:
I'm glad your PSU upgrade project is performing well, Sondek. The Zerozone 100VA PSU in use for my Xfinity X1 digital CATV box is also performing very well, along with other devices for better 2-channel HT CATV audio. I recently pulled a classic Audio Alchemy DDE v1.0 DAC with top-of-the-line Power Station Two PSU out of storage to hear how it sounds with the Xfinity X1 digital CATV box, and find its sonic signature to be spot-on for the application. What it might lack in high-performance dynamics when compared to a more modern DAC is countered by a very smooth and polite characteristic that helps take the edge off typically unrefined sounding program material, while allowing plenty of detail and vital midrange presence necessary for a coherent expression of the human voice. Yet another audiophile-quality power cord upgrade is in the works, which should improve the performance of the vintage DAC to an even more acceptable level. While I don't have a cavalier attitude towards pouring funds into a CATV box, I do wish to enjoy the audio signal as much (or even more so) as the video signal, especially when premium 2-channel HT programs are involved in my listening experiences. Television tends to be irritating enough without having to tolerate bad audio tossed into an A/V presentation...
Yeah, I'd much rather put my money into my audio rig. But you might get a laugh knowing I'm feeding the Kingrex with a length of Tunami II and Oyaide C4/P4 connectors on either end. That PC is worth more than the PSU it feeds by a fair bit. Until a couple of months ago that PC was used to supply the regenerator which supported my video setup. That regenerator developed an issue and is currently out of service. So, I figured why not.
I'm currently using a DIY Acrolink 7N-P4020III power cord with Oyaide P-037 rhodium AC plug and Furutech FI-15(R) rhodium IEC connector for the Xfinity X1 digital CATV box's Zerozone 100VA PSU. The particular cable/connectors combo helps to present a very focused and vivid sonic signature for the digital CATV application. I've yet to notice any profound video improvements, but I have not paid much attention to the issue, since that aspect has always been more than satisfactory. From an audio perspective, the Oyaide P-037 rhodium AC plug is what Acrolink implements for their factory-terminated Acrolink 7N-P4020III power cord. It's the only bulk power cable product I found to sound exceptionally good with the rhodium plated phosphor bronze Oyaide P-037 AC plug, while the rhodium plated pure copper Furutech FI-15(R) IEC connector helps to provide a full-bodied, assertive midrange presence for the particular component. I'm looking forward to building two new DIY power cords to evaluate with the dedicated DAC, then use the other one for another audio component in my system.
I also took your recco on the Lifatec Toslink. I connect my Pio soundbar to the receiver via Toslink. Had been using the el-cheapo that came with the soundbar. Put the Lifatec in the chain prior to completion of the PSU project and cannot say it made too much of a difference. Although I have a feeling that it needed the PSU implemented to really shine. As I've said, audio was immediately affected for the good once the PSU was inserted. One of these days I'll put the cheapo Toslink back in and see if I can get a handle on which one of the changes had greatest impact.
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