John, thanks.
I was just curious if you ever compared with or w/out Hydra with the same cord.
I did a test with the same 2 cords, Taipan Helix Alpha(except for 15a on amp and 20a on Hydra) and direct into the wall the amplifier sounds better. Not even a dedicated circuit, and still better.
As I mentioned before in another post, the McCormack amp I had sounded better with Hydra2 or Hydra4. With Hydra4 I'd say it sounded a bit darker than it did with the Hydra2, but still was better than plugging it directly into the wall, where there was an apparent AC noise even heard through the speakers if I had my ear close to the tweeter.
One of the differences between Hydra2 and all other Hydras is that it doesn't have the magnetic breaker. This may or may not make it more pure, but I do know that there was a difference between Hydra2 and 4 sonically. I do like what the Hydras do for the source components. Lowering the noise floor there seems to be nice.
Some people use Exactpower regenerators even on relatively big solid state amps. I haven't tried that yet, but I may.