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RE: PPP impact over upper-mids and high frequencies

Posted by PaulMC (M) on June 17, 2007 at 07:19:35

In Reply to: PPP impact over upper-mids and high frequencies posted by number 95 on June 16, 2007 at 11:20:24:

Wow, what a thoughtful response. Thanks for the detailed evaluation. Let's talk a moment about the isolation bit. When I was at the Munich High End Show I was reminded, by my new friend Roland Jaeger, just how important isolation is. He demonstrated to me how simply placing his special feet under a power supply made a marked difference in the soundstage.

So, I am in agreement with you that placement is probably quite important and there may never be a perfect way to isolate it. Good experimentation will help with this.

As to MultiWave vs. sinewave, what you have observed is a classic trait of the two waveforms and one of the reasons we supplied you with a remote control. Let's face it: there's no such thing as neutrality in a high end system. To start with, loudspeakers are extremely flawed. Their response lucky to be within a few dB of flat. And that's not the worst of it once you consider how that loudspeaker responds in the room. Room acoustics, loudspeakers, all play major havoc with "neutrality" and therefore no one can say their system is neutral sounding or that they're working on achieving neutrality. Ain't gonna happen!

So it's important to realize that in our systems which are not neutral and never will be neutral that we then go for what works best with any particular piece of equipment as well as different genres of music.

Your preference of MultiWave on classical music and sinewave on jazz music is a natural observation and again, one of the reasons we gave you the power to change with the remote control. Think of what you'd be stuck with without the PPP in the system! You'd have no chance for a difference.

As to the PPP sounding better than the P3, that too is the same conclusion I have as well and I think you made the correct choice.

Now, on to your bigger question about the lackluster highs. This is something I am quite familiar with. It's caused by clean power and it's fairly easy to correct.

When your source equipment is running with wall power, there's no chance for it to ever get clean power. Yes, as Romy the Cat suggests, there are days when the power is better than others, but it's rare indeed when the power is naturally coming from the wall in perfect shape. It never happens where I live. It gets better or worse, but never perfect. Only with a Power Plant can it be perfect.

The grunge that is on the power line rides up and down with the music causing a brightness that is not natural. When you clean up this grunge from the power line, the brightness is reduced and many times it can sound dull - because you're used to the brightness - but more importantly is the fact you've probably adjusted your speakers, cable selections and setup to molify this brightness.

What you need to do is this: accept the fact that the PPP is outputting perfect AC. Accept the fact that everything you hear with the PPP is basically correct and everything you hear without the PPP is basically not correct. This gives you a good baseline from which to start your setup process. Think of it like having a perfect starting point to launch from.

Aside from the break in issues of the PPP, it is now time to place the PPP in sine wave mode, and start the process of a little more toe in on the speakers to increase the amplitude of the highs to make up for this lackluster sound. In the end, when you're setup properly with the PPP in the system, what you'll find is that the audio will be bright and not involving without the PPP and quite right and involving with the PPP. Then you'll know you have it.

Best thing is this: once you have it right, the PPP will continue to provide you steady results that don't vary much from day to day.

One last thing: the difference between the P300 and your PPP. The P300 European version relied on an output transformer to raise the voltage on its output from 120 to 230. This transformer wasn't the best thing in the world for the system and it led to some colorations in the sound.

One of our goals with the PPP was to eliminate the need for this step up transformer which, indeed, we did.

Have fun!

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