The PSU1 will give you a sonic improvement over the basic 24V DC power supply
… 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