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  #111  
Old 11-13-2012, 01:14 AM
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j3brow j3brow is offline
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Originally Posted by redm View Post
I was actually wondering the same thing myself about 3 days ago. Glad you asked.
In my system, yes the benefit was obvious. It's been a couple of years now that I have been enjoying the benefits of regenerated power. When I got my first PPP, I compared stock power cord versus Transparent Reference PowerLink. The difference was not subtle. I can't explain it either but even though you are taking the wall output and regenerating "new" "cleaner" power via the PPP, it still matters what you feed into the PPP. The same goes for dedicated 20 amp circuits feeding the PPP. I also have Symposium Rollerblock Jrs under both my PPP. I remain very happy with the benefits the PPP's provide my system.

Jason
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  #112  
Old 01-29-2013, 03:01 PM
IanG-UK IanG-UK is offline
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Originally Posted by Laubsauger View Post
Hi all,

I am a newbie at AudioAficionado.org and have become an eager reader of the comprehensive PS Audio thread.
I noticed that this forum is one of the most substantial sources of information in the web concerning PS Audio's PPP. Thank you for various contributions!

I have been a confident user of the PPP (European version, 230 V) since January 2010. It is the piece of equipment which has been convincing from the very first note of music playing - the buying incentive was initiated immediately.

I feed all my gear via PPP. However, I have started to use a Mac Mini as a source for uncompressed music - transmitting the digital data via Halide Bridge into my Accuphase DP-67 (used as a DAC).

Why I am telling this? Since the Mac Mini (with its integrated switching power supply!) came in, I realized a severe degradation of sound quality with noticeable distortion which translates into sinewy, harsh heights. If I bypass the PPP and use a separate wall receptacle for the Mac Mini in the same room the harshness is almost gone but also the major sonic improvements of the PPP.

One approach was to reduce the output voltage. At my place, the PPP had to add 7-8 Volts at an average. After reducing the output voltage, the PPP does not reach 230 Volts anymore but has only 1-3 Volts to add. I imagine that this has lowered the audible distortion a bit whiteout removing the cause in principle.

Has anyone of you made some similar experiences as switching power supplies become more and more common also in high end audio equipment?
Are there any means to avoid this audible distortion (e.g. shielded cabling, insulation or the like)?

I was wondering if issues like this might be also one reason for PS Audio to come up with two news models - being closer to the former power plants and moving away from switching power supplies - as far as I understand the technical concept…

I am thankful for any advice!!!

Best regards
Michael

--
My system consists mainly of: Verity Audio Parsifal Encore speakers, Octave HP 500 SE hybrid pre amp, Gamut D-100 solid state power amp, Accuphase DP-67 CD-player, Restek Scalar tuner, Stax SRS 4040 earphones, Transparent interconnects and speaker cables and Eupen / Lapp power cables.
On the output voltage issue, PS Audio told me that the unit operates best if the output voltage is adjusted to be close to the input voltage. I'm in the UK and Vin is 245V whereas Vout, as I have set, is 243V, set using the base potentiometer. I tested all these voltages with a Fluke and did display adjustments accordingly.
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  #113  
Old 01-29-2013, 03:09 PM
IanG-UK IanG-UK is offline
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Originally Posted by Laubsauger View Post
Hi Jim and all others. Thank you for all your contributions. I think there is an audible difference if the PPP is not forced to boost voltage about approx. 10 Volts. Doubtless, feeding the Mac Mini with the PPP does make hugh difference!
Has anybody tried a setup like mine with a switches power supply engaged?
Best regards from Berlin
Michael
Yes that is also the PS Audio policy.

By the way, there was briefly a technical analysis of the PPP versus the P5 (and others) somewhere on the www which cited measured areas where the PPP was considered better than its successor. Unfortunately it has been taken down. So don't rush to "upgrade" to a P5!
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  #114  
Old 01-29-2013, 05:57 PM
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Masterlu Masterlu is online now
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