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In Reply to: RE: It's the PSU-simple as that. posted by FSonicSmith on June 14, 2015 at 06:56:59
... that they've noticed little or no improvement in sound after upgrading from basic wall-wart power to a much beefier or better regulated power supply.I think it's possible that the importance of a "large conventional linear power supply" varies from component to component. Some components might benefit greatly from this while others might benefit hardly at all.
Edits: 06/14/15Follow Ups:
I respect your response and it makes me think of the Simaudio LP5.3 (later slightly upgraded/modified by Simaudio to the 310LP) and the available external PSU. Mike Fremer reported that the PSU hardened the sound and did not improve it. I have the LP5.3 and love it, but have never had the opportunity to try it with the PSU. They don't come up for sale on A-gon often and I refuse to pay full retail (even after usual 10% retailer discount) for one. But, just perhaps, Simaudio did a mediocre job implementing their PSU. Few reviewers of the Zodiac DACs fail to notice a large increase of SQ with the matching PSU Zodiac offers. I also wonder if designing a product that can stand alone, but also offering an optional external PSU, is an automatic compromise. The state of the art products I am thinking of are not designed with that option. Check out the current issue of S'Phile and the VAC Signature SE pre-amp as a current example of a no-compromise design.
I owned Simaudio's P-5LE, which was at one time their top of the line, cost no object preamp featuring an outboard power supply with 8 stages of DC voltage reguation and a relay switched array of metal film resistors for volume control. It was bettered by the cheaper, single chassis P5.3 that they came out with later to fill a price point below the Evolution series. The P5.3 has only 3 DC regulation stages in the power supply but includes an inductor filter to each component that the PS supplies. It also uses a cheaper electronically switched volume control. I'm not sure what part of the P5.3 is better; power supply, volume control, or other. But they certainly accomplished more with less.
But interestingly, the matching W5.3 is NOT better than the W-5 (at least not the W-5LE that I still have). And I think the main difference between the two is the fully dual mono, stiffer power supplies in the W-5.
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