Puritan Audio PSM156 Review (AC Filter)

[BlackSpider777]

Please don't hate me, but if you didn't compare blind and repeated, it is far more likely that the difference was not in the sound waves reaching your ears, but created in the wetware between them. (see my previous post 3 above yours, and @Amir's directly above).

Cheers.

Well could be, i got the PSM136 for a very good deal, the built quality is to another level compare to other power conditioners, at least i know my Audio Gear which cost alot is protected.

Cheers.

 

[antcollinet]

Well could be, i got the PSM136 for a very good deal, the built quality is to another level compare to other power conditioners, at least i know my Audio Gear which cost alot is protected.

Cheers.

Yep - the surge protection is worth having if you live in an area subject to such surges.

(Not relevant for you, but for anyone else reading who may be interested in surge protection,)
That can be done on a whole home basis much more cost effectively at the power entry point to your home.

EG this with nearly 10x the surge rating at 1/5th the cost.

https://www.amazon.co.uk/Schneider-Electric-Electronics-Protective-Protection/dp/B00CONA1OQ?th=1

 

[Killingbeans]

So I ask for engineering analysis to explain what I hear.

You'll have a very hard time finding anyone who has a plausible one to offer. But neuroscientific has what you're looking for.

I totally get that facing reality would be devastating for your panel business, and therefore you're extremely reluctant to do so, but if you took the time do a proper blind comparison of these kind of products, you're guaranteed to get your mind blown. Maybe only for a brief moment, until you find some excuse for ignoring the result, but reality will nonetheless raise its ugly head.

 

[BDWoody]

. I guess others were right that the engineering analysis on this site is not mature enough yet. Hopefully technology improves over time. Or at least the degreed scientist are interested enough to engage and measure.

What are your credentials, after all your bluster and insults? You design and sell stuff into this market, but don't know how it works?

I guess I should log off now. Nothing to learn an I'm sure I will be deleted and banned. Be well.

Well, you are surrounded by degreed engineers, so if you actually wanted to learn something this is the place. We don't ban people for disagreeing, as we are all about helping people climb the learning curve, assuming they are communicating in good faith.

Hearing differences between boxes will almost always happen if no controls are used. The brain is a tricky beast, and if you are going to just ignore that part, there is little to be advanced in this discussion. It's up to you whether you want to actually understand, or if you just want to keep telling audiophoolish stories to sell audiophoolish gear. Nothing new under the sun.

 

[Frank Dernie]

The respone is, I don't know how to measure why your hearing, so your not hearing it??? What sort of answer is that. A forum full of people that don't own a stereo extrapolating from flawed data what people with stereo hear. I guess others were right that the engineering analysis on this site is not mature enough yet.

Actually the response is we do know how to measure everything audible in an electrical signal. There is only magnitude, frequency and phase - nothing else - at the output. Things get more complex with transducers but with straightforward electronics absolutely everything that -could- influence the sound is measurable, so if you are convinced, for example, that a reassuringly rare and expensive silver capacitor in the circuitry would be an audible improvement you could definitively measure whether it could be or not, and have been able to do for a long time. Audio is technically fairly simple and the engineering analysis has actually been mature enough to fully evaluate the electronics for decades.

What has not changed is technically naive people believing bollox IME. In fact it was probably better in the 60s when HiFi was still of technical interest rather than the fashion industry it became later. IMHO.

 

[Mart68]

What has not changed is technically naïve people believing bollox

Needs to be on a T shirt.

 

[Kingrex]

Actually the response is we do know how to measure

No you don't. The OP performed the most basic, incompleye test. Why wasn't a BACCH usef to do inpuse response test in a room. Why weren't blind audiory test performed. Tbats just two.

Thank god the world is full of creative people that are not held back by the lesser. Our knowledge of the world is built upon one step, learn and create. Another step, learn more create more. You just have forgotten to leatn and create.

 

[Purité Audio]

Kingrex no need to fret there are still plenty of gullible customers out there.
Keith

 

[BDWoody]

It's up to you whether you want to actually understand, or if you just want to keep telling audiophoolish stories to sell audiophoolish gear. Nothing new under the sun.

Thank god the world is full of creative people that are not held back by the lesser.

You can leave all of us 'lesser' behind you on your journey.

Take care now. Thanks for stopping by to let us know what you're all about.

 

[Frank Dernie]

No you don't. The OP performed the most basic, incompleye test. Why wasn't a BACCH usef to do inpuse response test in a room. Why weren't blind audiory test performed. Tbats just two.

You really are rather dim IMO.
If you are testing the influence of a mains filter on the electronics plugged into it you ONLY need to examine changes in the output of the item plugged in, not changes so far away anything could have caused them

If the filter doesn't change the output of the item plugged into it it can't change anything downstream.

 

[sq225917]

I take a slightly different view to some on here. I've heard lots of good sounding kit that had mediocre or even poor PSRR, it can work well on decent mains, obviously less so if it's on the same circuit as your other half's hair dryer.

Everything is built to a price point and sometimes design decisions yield potentially less than ideal outcomes for some users in certain situations. It doesn't mean it's a bad product, just that it's Compromises don't suit your circumstances.

Personally I'd not entertain those types of kit in my own setup, but that they exist and can be remedied if required serves someone.

 

[Mart68]

I take a slightly different view to some on here. I've heard lots of good sounding kit that had mediocre or even poor PSRR, it can work well on decent mains, obviously less so if it's on the same circuit as your other half's hair dryer.

Everything is built to a price point and sometimes design decisions yield potentially less than ideal outcomes for some users in certain situations. It doesn't mean it's a bad product, just that it's Compromises don't suit your circumstances.

Personally I'd not entertain those types of kit in my own setup, but that they exist and can be remedied if required serves someone.

But does anyone have 'decent mains'? I don't think so. And if they bought boutique tat with poor PSRR is this £1K sticking plaster a good idea?

That aside I've seen people with well-engineered electronics say Puritan made a big improvement which does beg the question 'How bad was it before, and why?'

But it's always the same people hearing the same big improvements with everything they try no matter how ludicrous, so not inclined to pay it any mind.

 

[Billy Budapest]

If the unit can remove DC from the line, that would attenuate or even eliminate mechanical transformer buzz/hum. That’s the only really audible benefit I can surmise. This would be the hum from the transformers vibrating and making noise that emanates from the transformer itself, physically, and not injected into the signal (as in ground loop noise, for example). So, removing DC could make your room quieter but would not make the music signal less noisy.

 

[Killingbeans]

It doesn't mean it's a bad product, just that it's Compromises don't suit your circumstances.

Bad PSRR is a pretty big compromise in my book. Whatever I get in exchange better be hella worth it.