AG,
I had my turntable, phono stage and preamp outboard power supply units plugged into the PS Audio.No amps.It should be noted that I place heavy value on speed,note shaping and transients.
Best,
Ken
btw-I believe that Bill Cowen from Soundstage has(or had)a Hydra in his system for an extended time period.Dunno if he will be doing the formal review tho.