Rsbrsvp

is this still available?

I'm not very learned in the technical aspects of power supplies but from what I have read, low noise or low output ripple is the most important factor in a PS. In this measurement- I think the Teddy Pardo mini may be one of the very lowest measuring power supplies made at any price. The second most important factor- according to what I have read is output impedence, and although I understand the original Teddy Pardo units had a bit higher impenance, the newer mini models have reduced the resistance quite a bit. I do not have numbers- nor would I understand them if I did. In terms of what I'm hearing- I have four double output Treddy Pardo's in my system for my modem, rounter, network switches, my streamers, OXCO clock, etc. I have NOT compared them to big name power supplies but have compared them to many of the Ebay and Ali Express "ultra low noise" regulated power supplies like LHY, Breeze Audio, Zerozone, etc.- and the Teddy Pardo is in a completely different league. Not even close. The sound is so much fuller, and solid, and smooth, and so much cleaner. The Teddy Pardo Power supplies get my highest recommendation.

I have 4 Teddy Pardo double output Power Supplies in my system. Powering an OXCO clock, three network switches, my router and modem, and my streamer and network player. I replaced the fuses with SR Master and got Ghentaudio Neotech solid copper DC cables. The sound is cleaner, tighter, and more musical than anything I could ever imagine. From what I understand- they have lower noise output than just about anything out there at any price and have zero feedback. Im not sure that anything out there (when looking at specs; specifically lack of noise) can beat them. I have heard that perhaps they have a somewhat higher impedence than some other power supplies, - and I am no technical expert- so I cannot confirm this. However even if so, everyone I have asked says this should not be a negitive variable for digital equipment, only analogue. I highly recommend these power supplies- and the fuse upgrades. Just stunning results.

Flkin, I appreciate this and it fits my experiences with mains conditioners. My PSM156, like the cleensweep makes things brighter and leaner. Is it a bad brightness? Depends on the system and the ears. The amount of clarity, seperation, detail, crispness it allows through is way above the Topaz .0005 isolation transformer I have, but it is thinner sounding and brighter. In the wrong system- the PSM156 can be to much of a good thing; to much filtering- and end up with unpleasant results. The Topaz is to my ears revealing much less of the good which the PSM156 does, but still some of it, and with none of the bad. In other words, the music remains sonically dense and tonally darker, rounder- which to my ears is preferable in general. I am convinced, seperate of numbers, measurements, or any technical understanding, that the PSM156 is filtering much more noise than the Topaz- and no measuring device will change my mind. Less noise equals more detail, transparency, seperation, crispness, authority;- and the PSM156 results in substantially more positives in these descriptors. More detail also usually results in leaner, drier, sharper sound- perhaps not so positive if overdone. One nice option for me is to combine. I put my digital equipment on the PSM156 where I feel the benifits are greatest and the negitives are least and the Topaz on my preamp and amplifier to keep things thicker and rounder as I feel the PSM overdoes the cleanning process on the analogue section IMHO while the Topaz has it right on this equipment. Its all a game and everyone will come to their own conclusions.

Flkin, have you tried using the Topaz and the onfilter togethee? If so- how does it sound?

So- I wrote to Mike Lester of Puritan Audio. Anyone who searches the internet will see the nearly unanimous praise on head-fi, audiocircle, audiogon, etc regarding his PSM156 mains filter. I say nearly unanimous because around 10% of reports complain his mains conditioner makes the sound thin or bright. Perhaps another roughly 10% say it is a subtle change for the good and around roughly 80% say the change is substantially for the good. Please check yourselves. He is a genius in the field whether one likes his way of doing things or not. His filters are so popular, he cannot make them as fast as he sells them. He is literally inundated... I wrote to him to ask if his conditioner raises impedance and if that is a problem and he basically answered "yes" without saying so literally. He said anything you put between your wall and your component damages the sound. The goal is to come up with a device which improves sound more than it damages. He also said EMI is easy to get rid of. He could have designed his units to remove much much more EMI than they do easily- but the problem is the damage that results from this process becomes more than the value of removing the EMI. So- I am attaching his letter as a lesson to us. ___________________________________________________________________________________________________________________________________________________ The only truly relevant measurement is with the instruments each side of your head. We do not publish detailed blueprints of measurements, materials, methods or other design aspects. This is hard earned knowledge that we accumulate and apply towards a better sound. The thing with conditioners is that they can do as much harm as good and balance is critical: Anything in between the mains wall socket and the power input of the equipment is going to be bad, even a just few centimetres of cable will have a resistance to current flow and an eagerness to act as an antennae gathering interference, both bad. But, the state of pollution of mains electricity worldwide is awful and this is something which has crept up on us massively over the last few decades with now very often in excess of a volt, sometimes several, of high frequency hash carried on top of the legitimate voltage waveform. And this is really, really bad for trying to resolve every subtle nuance, phasing and clue from a musical presentation. We quickly discovered, because we listen intensively to every step we take, that that achieving more decibels of noise reduction for the spec sheet was very easy but definitely not desirable: We noted that taking away HF hash liberated electronics. By not having signals blurred, smeared and buried and not having processes swamped by supersonic garbage, then being able to concentrate solely on those signals you want; not only source components but amps as well benefited, greatly increasing dynamics, broadening and giving greater depth to the sound stage and definition…….. But go over a line and you go backwards flattening the image and draining the life. This circles back to my earlier comment that introducing anything in the power line introduces a restriction = bad. With power conditioning you are inserting elements to eliminate the HF noise but which by their nature will also have a negative side. We went to enormous lengths to correctly identify the sweet spot of just enough cleansing but not too much, but this was not quite so easy as the sweet spot had to hold for a host of very different loads; sources and amps alike, amps of low power through to high power and Classes A through to D. After a very long time with hundreds of adjustments to a series of potential prototypes in countless different audio set ups we arrived at our solution of which we are extremely proud. The PSM156 (and PSM1512) work by having the optimum degree of noise filtration, also taking care of star grounding, DC offset , surge protection and importantly isolating each connected component from each other so that cross contamination cannot occur. We think we nailed it. Best wishes – Mike

FLkin, Does the Cleansweek onfilter make the sound thin or bright? Is the sound as tonally dense as when using the Topaz?

Thanks for the update. I'm hoping to order mine too. I will be curious about EMI measurements- but truth is- not everything is EMI. Isolation, grounding, leakage, impedence, and all this other technical stuff I dont understand seems to make a difference. What matters is what sounds better at the end of the day. I am not a scientist, but rather an audiophile.

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I will say that focusing on EMI removal as the "cure all" for mains issues is wrong. I hear conditioners which remove less EMI than my Topaz 31 but which perform other functions better and which many audiophiles would say sound better.......

Seems the Topaz is best at common noise removal and OK at normal noise removal... The question- is - is this the most important factor to lead to better sound? How about low impedence, leaks, voltage regulation, ground noise, isolation of components, and al the other stuff I don't understand? I had a PSM156 which focusus on independant isolation and grounding with soem EMI supression and it sounded much different than the Topaz 31. Much more clarity, energy, dynamics, extention, transparency, crisper- but a leaner sound as well. I want to try the cleensweep but I live in Israel and shipping and duties is not doable for me.

In fact, I thought the reason we do not put another filter after the Topaz is to prevent leakage from seeping back in- but if I put a PSM156 after the Topaz, each output independantly prevents this from happening- I think....

The thing I like about the PSM156 is it does it's job on each output seperately- not like a power strip. this should eliminate leakage going back into other components.... A power strip will not do this...

Thank you John so much for the response. One more mains purifier that has got literally hundereds of praises on the internet is the Puritin PSM156. I would be thankful if you could share with us what you think of it. The reports are so so numerous and perhaps the approval rate is around 90%.... I cant help but wonder what they are doinbg inside of that box????

I wanted to ask John Swenson's opinion about adding the following EMI blocker; which the company clains does not increase impedence to the chain before or after the Topaz model 31 or 32? Do you think it would have any value? https://www.onfilter.com/ac-emi-filters-af-series