Need for Power Conditioning??

You must experiment. If you have a resolving system that's properly wired you will notice a distinct benefit merely by adding additional separate isolation for your digital on top of your overall isolation with your Equitech. (I hope you have a phase reverse switch on your preamp -or- ensure proper phase to your loudspeaker by switching your black and red connections which reverses phase to the speakers. When playing in correct phase the music will sound cleaner, smoother, more dynamic and sibilants will be reduced.) When you used to clean power you won't want to go back; likewise with correct phase.

As well, look into/read up about doing your AC wiring using good quality well shielded wire as is used in sensitive and critical computer controlled robotic applications. It's vastly superior to basic household or even standard industrial 10 gauge wire. Much more resistant to noise. I accept what Coxhaus says above; however, he to will find further improvement by adding additional conditioning to his digital, analog or both. The more revealing the system the more benefit you enjoy from these efforts. (Have you experimented Coxhaus?)

Coxhaus you've got a great setup. I'm sure your one of the few to hear a guitar sing from a digital drive. The isolation should be mandatory-well it is for great sound anyway. I agree with Terry-there is no such thing as clean power from the pole, anywhere. Terry, have you found it better to have the voltage transformers ahead of the isolation transformers, or vice versa?

You also want a dedicated run for you listening room only. This reduces "in-home generated noise" contaminaion of your audio-video room.

I'm with you Pauly. Terry, have you tried reversing the order?