FYI: Wadia now has a clocked USB input option, which can be retro-fitted as an upgrade. Roy, you should get this added when you get the '2' power upgrade. My recommendation is to not send in your unit until Steve has the 'u' upgrade in hand.
Incidentally, the '2' upgrade adds considerable heft to the lower end. A good upgrade if you are already using good power cords on the DACs.
Incidentally, the '2' upgrade adds considerable heft to the lower end. A good upgrade if you are already using good power cords on the DACs.