Does anyone have experience with the Revelation Audio umbilical cables for the Pass Labs XP-32 preamp? Do these cables make for a nice upgrade over the stock umbilical cables?
You would be better off spending that money elsewhere.
The stock cables are very high quality. And they do not carry signal.
I have installed it on my Pass Labs XP-22, while it is not up there in the stratosphere as your XP-32, I noted a slight improvement, typical of a lowered noise floor. Recommended.
Pass learned from the XP-20/XP30 preamps as those umbilicals were problematic, noisy. My experience differs with the XP-22, hearing a modest reduction in noise.
After all it is no more than a power cord.
I’m with Rick (@weedeewop) on this, Mitch. I found the RAL to be a small but (to me) useful improvement over the stock XP-22 Cord. Having said that, I will also note that by comparison the difference was smaller than the difference between the stock XP-20 and the RAL cord for the XP-20. There are probably other areas where more significant gains can be had in a system, but if you’ve got money hanging around doing nothing, you might want to give it a try.
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Now if it came down to the RAL umbilical or a Gryphon PowerZone, then it has to be the PowerZone. Its impact on all components and overall sound is stunning. The downside for some is the considerable cost.
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RAL has made people (me included) upset with his delivery. I suggest you do some interweb research. I have not seen anything in a while, nor have I made a RAL purchase YMMV.