I finally got to take the amps off my Hydra and compare the sound with and without. The Hydra is plugged into a dedicated circuit with wattgate outlet and an Elrod Statement powercord. I removed my 600 watt monoblocks and plugged both of them into a single 20 amp dedicated wattgate outlet. The difference was staggering, and much for the worse without the conditioner. I was really expecting there to be increased dynamics and a real potential for improvement without the conditioner, so I did not have a preconceived notion prior to the experiment. I also left the system on for an additional 12 hours just to be sure it wasn't just from turning things on and off. Anyway, I found it literally unlistenable without the conditioner. It was harsh, lacked pace and rhythm, the soundstage lost all perspective, and was very 'unmusical'. When I plugged everything back in, it thankfully improved. Does the conditioner serve as a mask/filter for problems or does it allow my components to function optimally - who can say and who cares. For me, this issue is settled. The amps are staying plugged into the Hydra.
I would also just say that without the conditioner, things sounded a bit louder, more forward, and more detailed. However, it all lost it's proportionality which is crucial for conveying the proper soundstage for classical music. So I guess there is some room for personal music preference and system to say that some may like it without, and some may like it with.
Rob