Graham Slee PSU1 Power Supply Upgrade
The Graham Slee PSU1
The first time we heard one of these was when we got an upgrade for the trusty demo Era Gold V and it made a huge difference.. in fact it kept the ERA Gold on the main auditioning system for another three years! It is still hard to beat... For any compatible Graham Slee product with a standard 'Green' PSU this simple upgrade makes a lot of sense.. They even make a notable difference to the Communicator!
The lead times are usually about two weeks on Graham Slee products as they are all hand made in a workshop in sunny Yorkshire and individually bench tested by the production manager himself... However at the moment this is extended to three to four weeks due to the Coronavirus situation. So please be patient... We think great things are worth waiting for!
... the benefit it [the PSU1] brings to the already strong performance is immediate. The low noise floor drops away even further and the very slight leanness to the midrange is reduced, helping thinner recordings sound a little fuller without any detrimental effect on the speed and musical agility with complex bass routines. The same slightly dark character of this phono stage partnered with the van den Hul cartridge is retained, which may or may not appeal, but helps to lend it an urgency that is extremely appealing to my ears.
-Hi-Fi Choice Recommended Review of the Revelation C phono amp
My Audion Silver Knight pre has a superb valve phono stage, but only one, I needed two. Enter a 'White Knight' in the form of Graham Slee. He happily supplied two of his GramAmp2 phono stages. These are wonderful devices for beer money and my experience with them made me consider them capable of showing up front-end differences even at the high-end. I was right... Graham even included the optional bigger [PSU1] power supplies, which managed to lift the performance, particularly the sense of scale and openness, to a point where at times they were a match for the Audion stage...
- TNT Audio: Turntable tests - Methodology by Geoff Husband