I have also owned Brickwall products and the quality is great. I still use a Brickwall device for my computer, but is a surge protector and filter.
 The BPT product that I own is really an excellent idea. This isolation transformer has 5 separate secondary windings, as I mentioned before. I really can't say that it has a signature sound to it, but rather lowers the noise floor because of the separate secondaries and the balanced power output. I am not presently using it for Audio, but rather for AV. Since the AV and the Audio systems feed from the same dedicated line, I felt that it would best used this way.
As far as the P300, P500, and PPP, I liked the performance that they offered by being able to switch up the power signal to what works best with your system. I think that they might have a different effect with any given system, so it is hard for me to compare them. What I mean is that with power conditioner, I was using different stereo components. The effort was to find what system would be best for my taste. I have ended up with a few Decware components, after trying different brands and types of equipment. I will say that in general, I would not go without one of these re-generators in my system. Come to think of it, I did use the BPT product by itself, but I still like the idea of being able to tweek the power when I feel like it.

PS Audio confirmed a P3 would be plenty for my current system and according to Paul it could well be plugged to my IS Tx, second in line and before my system components, complementing what the IS Tx is already achieving.

Paul also indicated we should listen to the P3 in the above configuration and compare it with the P3 by itself (no IS Tx) so we can see which way is better sounding.

Now, I just need to get me a P3 at a reasonable enough price that I can afford ... I don't think any other regeneration plant would satisfy my needs in the long term, so I'll be patient for that P3 opportunity.

In the meantime, I had to work Saturday and no electrician would come on Sunday, so I'm back a week in my power issue analysis.

Thanks for the good wishes, LR. The way AC power is behaving lately, I'm not enjoying my gear anymore. Sunday morning I woke up to a complete black-out, which lasted several hours. I did not listen to my system when power finally came back , as I was afraid of unstable power supply.

I hope the power company gets its act together soon, as it was not at all like this before. I also hope the regeneration plant will solve at least the bulk of these issues. I'm having my fingers crossed.

You know what sods law says. Sods law says you get the P3/regenerator and the power company finishes its work resulting in better power than you`ve ever had. Still, the P3 will be a cornerstone in the system. My mains sub gives me peace of mind, literally, by delivering clean power. The noise floor went woomph right down. My mains is probably ok but you dont realise whats on it till you lose it.

Got further word from PS Audio, answering additional questions on my part. The conclusion I've arrived at, could be thus summarized:

The PS Audio P3 does not achieve the de-coupling from the mains effect the IS Tx does. The IS Tx does not yield perfect sinewave AC either. Therefore, although the PS Audio P3 also cleans the power through re-generation, if both could co-exist, this would be the best of both worlds. Besides, the IS Tx would be protecting the expensive PS Audio P3 from AC accidents/disturbances.

With this in mind, I would need to assess if the combination of IS Tx feeding the PS Audio P3, or else, the PS Audio P3 by itself, would sound and behave dynamically best. Of course, the former scenario would be ideal. The only caveat is the power ceiling would lower from 750 watts to 500 watts, as the IS Tx would be the weakest power rated device in the chain.

In my system, 500 watts are more than enough, and if a larger amp comes in the future, it would also be enough, since I would never acquire a larger than 15-25 watts amp anyway.

Now, I just need to get my hands on a PS Audio P3 bargain!

I understand. So far, no noises coming from my IS Tx, but I may not know really until I check both configurations. We'll see.

I see, but when my AC power was performing decently I did not had any graininess or edginess in the sound, quite the contrary. After tube-rolling to optimize my setup, which at the time had a darker/warmer sound than what I appreciated, I got openness and detail.

Partly through DAC replacement with the Sabre chip, partly by replacing output and preamp tubes, I was able to balance the sound to my tastes. The new Tekton Lore 2.0's have also improved the level of low volume details and took off some edginess when using the powerful (beamy) Brimar 12AT7 preamp tubes.

BTW, I just received further answers from PS Audio, this time from the technical department (the technician was out of the office until now, so customer service, citing Paul, had been replying so far).

According to the technician (today):

My apologies for the delay as I was out of the office.  Yes the P3 can be plugged into a isolation transformer and you should notice no performance difference from the P3.

And from your specs it looks like the P3 should be sufficient to power your pieces.

I think this eliminates any doubts about my plans. Theoretically at least, the P3 should perform the same whether it is connected to the IS Tx or not, which would add the advantage of de-coupling the mains that I want to retain. Of course, this assumes the IS Tx is not contributing with added noise (it should not, by design), and this will be determined by comparing both scenarios for sound and dynamic quality.

Thanks.

Today I received the last confirmation, from PS Audio Engineering, that the P3 would work no problem with my IS Tx:

"After working with engineering they feel that the two wouldn’t create any issues."

Reason I insisted for confirmation is the people at Tripp Lite are not convinced two transformers-like (i.e, their Voltage regulator and the IS Tx) can work together as one would look at the other as a potential power problem or something like that (also, because both are high output impedance devices). Anyway, I feel at ease now with my plan.

Neat. Let the dice roll ... bargains, bargains ...  any bargains?

FB,

  I haven't entirely read all the posts that are here, so here is my advice. First of all, two speakers in parallel will end up with a lower total impedance. In the case of two 5 ohm speakers, you will end up with 4 ohms when in parallel. In your case, a speaker at 8 ohm impedance and a speaker with 4 ohm impedance will result in a total impedance of 2.67 ohms. For a lot of amps, this is NOT advisable. My Rachel amp, IIRC will drive it all day long. So the short answer is that it depends on the amp you are using. Finally, I would want to see an impedance curve of the two speakers to be paralleled to make a decision.
 Let me look for the web page that will help you address this issue, and then I will try to post it here.

4krow,

Thanks for the pointers. Even though I skimmed over that article, I came away as confused as I was before reading it. Well, not so in terms of the concepts, but whether a tube amp like my Mini Torii would be able to handle the 2.67 Ohm combined impedance without sacrificing sound or dynamics.

I guess the answer to this would come from Steve. I only know my amp works best (max power) at an 8 Ohm impedance so it would probably won't be a good idea to do this. After all, part of the reason for replacing my DM945's with the Lore's were its impedance and sensitivity. Thanks again!