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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: A re-evaluation.Posted by manisandher on: 3/27/2011
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 Romy the Cat wrote:
I still doubt that you were, by the virtue of insulation transformer and ground, able to get what PP2000 gives but as you understand there is no ways, or even needs, to address my doubts.


Yes agreed, there's no need to address your doubts. But I know you have a canny way of being right a lot of the time, and because of this I've have spent pretty much the whole day listening and comparing AC from isolation transformer (IT) vs. PP2000 regenerated vs. PP2000 battery.

The conclusion is that I must have had pretty good electricity when I first tried the IT on its own at 1am a couple of days ago. The IT now has a typical 'isolation transformer sound' - sorted of HF-filtered and a bit hazy. It gives the impression of deeper bass, but I think this is more down to low-end smearing than anything else. Certainly easy to listen to, but not very musical.

In comparison, the PP2000 in both modes sounds more alive and rhythmic. The real surprise for me though is that the PP2000 now sounds really nice in regenerator mode! This is the first time I can listen to it and actually enjoy the sound from it. There's a lot more HF information coming through than with the IT. But it's the LF that I really like - very tuneful. Not as full as the IT, but I think more accurate and musical. The only explanation I have as to why I didn't like the sound when I first heard the PP2000 a couple of days ago with my new mains circuit is that I did not wait long enough for the PP2000 to warm up before I started listening in regenerator mode. Who knows?

But contrary to what APS might say, there is still a difference in sound between regenerator and battery modes. The very pleasant surprise for me is that I like the sound of regenerator mode at least as much as I like the sound of battery, and in some ways more - it sounds more dynamic and the bass is more tuneful.

But it's worth pointing out that the PP2000 never sounded this good running from my regular house AC mains circuit. The guys at APS told me that my new mains circuit (with very large IT and dedicated grounding) would help get the best out of the PP2000, and it seems they were right. Needless to say, my PP2000 is no longer for sale!

Mani.

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