I love Amir’s ability to keep the conversation respectful, yet brutally honest.

So his response was essentially that bad product documentation is irrelevant because his average customer has more money than sense.

The key element as Amir points out is that decent equipment is extremely well filtered. Power line "conditioners" are a waste of money.

Thanks for your honest review. I too bought a PS300 years ago and after a year realized it did absolutely nothing. Snake oil is hard to overcome.

Amir is for the people. I appreciate this type of content endlessly. Protecting people's wallets and helping direct them toward items objectively better, it doesn't get much more considerate! It breaks my heart a bit that people try to tear down ASR because they don't like the feedback, but not terribly surprising when many of these companies profit off of ignorance

This stuff gets complicated quickly. Thanks for thoroughly debunking the claims of charlatans. It’s a great service to audiophiles. 👍

You bring so much light to this world. Thank you Amir for doing all this work. Paul is evil for demanding you apologize when he is the one taking advantage of people's emotionally driven purchases by lying them and bullying anyone who dares object to his false claims. He should be the one apologizing and more. I can't wait to see more measurements of big companies' gear.

Sometimes I spend the day talking to humble, intelligent people who apply careful methodical processes to solve genuinely important and complex global problems at billion dollar companies, and then I get into the audiophile world in my spare time and to be blunt it feels like stepping into dog poop every time lol. These low quality engineers and business people wouldn't last a day in a demanding environment. It annoys me to even think about arguing with people like that... you're a champ for doing it. You have emotional strength and patience that I can't match even if I tried. :( With respect to the thermistor.. from that overactor Paul the idea was that the thermistor was supposed to be bypassed by a relay some time after power on? But it doesn't seem like this is what happens? They'd need a fast current monitor for that, which would disconnect the bypass relay during a huge inrush peak and then reconnect it some time later. Since the differential between inrush and "normal" peak power of an amp is typically more than 10x, it should be doable.. however, it doesn't seem like that's what they're doing. It seems that the power is always routed through the thermistor? Absurd. If their engineers were smarter, they'd do what my $15k AC power supply does and current limit on a cycle by cycle basis on the power regeneration side. This way you guarantee lowest possible impedance and no relay-related issues to worry about. It's not surprising that for products costing as much as they do, their engineering is not even in the same league as proper industrial manufacturers. I guess it doesn't matter to them as long as they keep getting new members to join their cult. :/ -Nick

Thank you very much Amir. I've been involved with audio, both professional and consumer, for 65 years+. Have been made a little nuts over the past 40+ years by the confusion perpetrated by the high-end audio business (both manufacturers, and many [newer] magazines. You're performing an invaluable service to those of us who love listening to music via good equipment, restoring audio reviewing to what it was in the 1950s and '60s, before so much "high-end" audio became an over-priced game that tended to (psychologically) interfere with the joy of listening to recorded music. Again, thank you very much!!!

This is an excellent & thorough scientific analysis. I'm one of those electronics engineers who had doubts about the validity of power regeneration for audio. Much of what PS audio does is genuine and plausible and yes over the top as to what's actually needed. When you take things too far at inaudible levels then psychology becomes the dominant factor. All credit to you for doing these tests. Ethan Winer is another technician who proved to me my gut instinct was right.

45 minutes of electronics investigation that I find more interesting, by virtue of the quality of the logical discussion, than 98% of available entertainment. With respect to something relatable about psycho acoustics; people are familiar with mistaking a common sound with something else, a person alone in a home might convince themselves that a branch scratching on a window is a prowler. If a shadow accompanies the sound the effect can be alarming, our senses are fully given to being controlled by imagination. Last, a question for Amir; concerning the build and parts and manufacturing costs, what do you guess is the margin on one of these at $5500? It may illuminate the position of the company CEO. The writer Upton Sinclair reminds us, "It is difficult to get a man to understand something when his salary depends upon his not understanding it."

Absolutely amazing! The analysis of PS Audio‘s (i.e., Paul’s) desastrous (honestly, embarrassing) public communication takes this to a new level. You really expose EVERYTHING that‘s wrong with bogus high-end audio, including the rhetoric and the behavioural aspects. Thank you so much. We need someone who is so absolutely independent and does not need to make any money with this type of testing. To spread the good word even more, you could consider monetizing, though. KZfaq pushes monetized videos much more. You could donate all revenues and still credibly claim that you’re not in it for the money. Just a thought. I‘ll watch/read and love anything you do, anyway.

I appreciate the obvious frustration you felt when Paul replied to your review. Keep at it. Real measurements by real equipment is the way to go. As someone who has spent years testing things in the lab I really appreciate your honesty.

Every time I listen to the NAD T758 V3, I remember it was one of the worst things you tested - many thanks for that 😊 But at least now I can keep volume at -6, and you also mentioned the noise floor was the worst thing with this, which I'm okay with currently. Point being the feedback you provide is valuable above and beyond a simple review

Take for example Schiit: After backlash from measurements, they now take those seriously and make some good equipment for good prices.

I adhere to your science philosophy. I personally believe companies that publish false information such as PS Audio should be taken to task. I also have a relatively high end system, but will not incorporate snake oil into it. I hope you keep up this absolutely necessary WORK that you do so well, Amir

Brilliant follow up. Love your process, measurements don’t lie, and thank you for your listening test to put this snake oil to bed once and for all.

Reasons enough that I will NEVER put my money down for any PS Audio product. Thanks Amir for exposing the charlatans at PSA.

I worked in the microwave telecommunications industry for many years. Performance of our products were largely dictated by custmers needs, so test data was necessarily supplied with each and every item. And when product failed to meet expected performance, corrective action was mandatory, or there were finacial penalties as well as damaged reputations. I would think that a item as expensive as the P12 might come with test data. Yeah, you can call me a dreamer. If PS Audio were ISO certified there wouldn't be any of this nonsense.

I like your words:. "Measurement has VALUE." Very insighfule. Thank you.

I am a Power Engineer for many years - and I thank you for this video. I just can’t believe 7mOhms output impedance - just crazy spec!

There was a time I was watching Paul's videos with advices - but then I stopped when he started talking about things, he knows less than me. Now I am watching Amir's video. The biggest difference is: - Paul is arrogant - Amir is confident I will stay with confident person rather than with arrogant.

When I first noticed you were reviewing this product, I was tempted to not watch it. Mostly because my technical experience tells me it will not do what it claims to do. So many reviewers will say it's wonderful and adds so much to the sound it makes me want to cry! I must say I was so pleased I did watch and was delighted by your honest and sensible analysis of the results. Sadly, many audiophiles think, if it looks good, costs a shit load of money, easily baffled by the manufactures fantasy specifications, well, it's gotta be good! After you sold a kidney to purchase such a device you WILL be convinced it improves the sound. The audio industry is bulging at the seams with snake oil and so it will continue for as long as some people have too much money.

PS audio is gonna be releasing a new product called the BS12. It's meant specifically for power regenerators like the B12 to be plugged into so the regenerator can get even cleaner power than before. They will also sell an optional rack with 6 spots so you can fit 6 BS12s together and chain them so that your power gets cleaned 6 times before it even reaches the P12 to have the cleanest power ever. Each BS12 will be much cheaper than a P12 at 5k a piece.

I had some of their products in the past (about 20 years ago), there was a lot of hype at the time, it was the new market opportunity for "high end" companies. After trying and living with a few power products from different companies including PS Audio, I realized, after long time subjectively observations, that it was all hype and many of those worsen the sound. I never looked back... I now do have some simple pro Furman units ($150 to $200) mostly to protect my audio and computer gear from possible surges, but nothing more. As usual, amazing work Amir in bringing reality into high end audio!

Thank you for the additional work and video Amir. This sheds a lot more light on the product than your previous video and I am glad you took the time to follow up on some of the comments made.

Glad I found your channel on KZfaq. You are the only reviewer out there that is objective and has the measurements to back up your reviews. I am not an electrical engineer but am easily able to understand what you are what you are conveying. Just like with the esoteric cables, according to the science, there is no need to waste money on a power conditioner. Thanks for saving me money and helping me enjoy the music system I have instead of spreading hype and instilling audio envy.

Your passion to just look at the facts and ignore what our emotions want is a mindset that many people would benefit from. Keep up the great work.

We both struggle in this world with soooo many sheeple with out ANY common science. Keep up the great work!

Great Review! Always appreciate your transparent reviews!

Great follow-up review Amir! The fact that you've performed additional measurements and a follow-up review after 24 pages of comments from members on your initial P12 review on ASR, refutes the claims made by detractors and critics of ASR and its members as being blindsighted by measurements. There are always a lot of questions raised and suggestions made by the members as well as dissenting opinions. But this is all part of a healthy scientific process. IMHO this is much more valuable than manufacturer claims and other review medias that expect you to believe their recommendations based on faith of their experience and their sense's abilities to reliability report their impressions; an overall very subjective and unscientific method. Like the great Carl Sagan said: "Faith is the belief in the absence of evidence". Something followers of Paul McGowan should take heed of.

Thanks alot Amir, just subscribed to your channel mate...appreciate the all the effort. Always appreciate who cares to provide honest views and info with transparency. I'm no techie but I'm learning lots by just watching and listening.

It’s a pleasure to listen to an intelligent human being. Thank you.

Whatever respect I had for PS Audio and Paul just went out the window. Thanks for saving me a big chunk of money.

Amir, I'm glad that you did a little more testing. So the higher power outlet that intuitively is hooked up to the power amplifier has inrush limiting. Sounds like just a simple power NTC, possibly by Ametherm or similar. Coincidentally I just finished making a soft start circuit for a power tool that uses power NTC resistors. But after about three seconds I shunt the NTCs. You would think that for all the engineering and the asking price, that PS Audio wouldn't just leave the NTC in the circuit after startup. I love how Paul will tell a little fib and that leads to a bigger fib and then he digs his heels in. Well maybe its kind of sad as many of us are rooting for him to do the right thing but a good portion of his business is built on sand. So what products are good and what products are bad? Its a shame that I have to be so suspicious but it is well founded. If PS Audio was truly honest about what they're selling they would be working with you instead of giving dismissive responses. He is one heck of a salesman and I think he may believe some his own fibs. Problem is, that's counter to good engineering. I've look at that product line as an environmental waste so if customers realize, I figure Paul has no one to blame but himself. He's had plenty of opportunities to do the right thing but his heels are dug in. Very stressful, but I think you've been un-biased and let the cards fall, where they may. Thanks!

Hey Samir! Love the website and channel man. I’ve made a number of purchases with your guidance as well as Audioholics. Our industry needs more people like you as everyone from enthusiasts to novices can appreciate the empirical data you provide in order to make educated buying decisions

The imagining of sound differences is fascinating. I’m starting to notice how vaguely people speak when they report improvements, and how uncertain they appear when making the claim. Thank you for this channel. I’m enjoying having one foot on a flat earth, and one not, and at this point in my education it’s okay to not be sure what is real. Hope this makes sense!

Thanks Amir, you stand up for yourself. We need more of this

Thanks for doing the measurements that confirm my gut feeling. I particularly liked that you measured the DC output from two different power supplies hooked up to the P12 cash generator. Sorry, regenerator.

Hi, you are real thing !!! Appreciate so much of your truthfulness. I have been listening to music using many gears for 26 years. Audiophiles used to spend money to have a very little improvement of sound. Company prople make use of audiophiles want. So, we are exposed to risks. Thank you so much. We need people like you, such an objective speaker.

It’s pretty sad what companies do. Mr. McGowan’s response is upsetting and he deserves the backlash Unfortunate that he takes the respect and admiration that he gets from people for granted. Difference between reel and real couldn’t be more apparent You did well Sir Amir. My respects 👍🏼

Amir. You did great. So much due diligence has been covered by you and I consider you a trusted friend and appreciate your passion to pursue honesty and great performance from audio products. Also. Your home system is beautiful and I love your STEALTH headphones. :)

Every time I have heard a high resolution system that is using any type of mains regeneration I hear noise and distortion that should not be there. I completely agree with the results of this review

Would love to see you showing your tests to the various people who make the products that you test and watch the expressions on their faces and what they have to say in the room with you,the product,testing gear etc live. That would be incredibly informative as well as entertaining.

I have designed power systems most of my life, longer than even Paul. There is no reason for you to apologize, you are absolutely right in every respect. I did do some research on SMPS in audio and must admit they like to have a near constant load, and would operate best that around 50% pulse width since there is then enough headroom to provide higher peak currents when called upon. Also, there is less interference generated when operated at a moderate level while remaining much more efficient. Therefore, rating an SMPS for twice the power required by the equipment is the obvious choice. It remains a much more cost-effective solution than their "linear" counterpart. Unfortunately, it does not regenerate a 50/60Hz a.c. that is what your mains input for your amplifier needs, having a mains transformer.

The audio world need Amir’s… I use this channel before buying things and it saved me a lot of money 👍

Excellent and appreciated work Amir, not that I would ever consider purchasing anything from that company, you've only to see McGowan's videos, and that, if people have enough sense, should be plenty to put you off his companies products.

I want to also thank you for all your hard work again, this video clearly shows all the data and makes perfect sense. In my own opinion Paul should apologize to you and also to each and every one of his customers, who bought this device.

Amir. Very simple have PS Audio show you their test results and their Test setup. I doubt if they can supply any data. Again thank you for calling out these manufactures that use smoke and mirrors to sell over priced boat anchors.

I bought a P5 many years ago and can confirm it makes no difference to the listening (in my very high end HiFi chain). Now you've proved it beyond all doubt! It's funny that PS Audio market themselves as an honest company!

Nice done review with hard data to support findings. Thank you. Keep up the good work Amir.

What you're right about ... among a lot of things ... is that "audiophiles" will latch onto to anything that is unreasonably expensive, where the manufacturer says it's "better". Marketing is fascinating but it's not just audio equipment, it's all kinds of products. Anyway ... thanks for the post.

I'd say Paul's gaslighting skills are as sharp as ever. Great work Amir!

I was actually looking at this product to buy and you just saved me $7500au I’m glad I stumbled on this channel

Very informative, like the logic you use in your testing process. Thanks for giving us good look at these products!! PS Audio's response is the typical response when they can't back up their responses with measurements, etc. Sounds like they're just deflecting and talking down to you ... not the mark of a company I'd do business with. As it stands I'll be staying clear of PS Audio.

Thank you amir.. its great to listen to you..

Amir Your review makes perfect sense. i had purchased a PS10 power regenerator. The thing just went up in smoke. i tried contacting paul and other chaps from psaudio who just exchanged pleasantries and did nothing.The unit is lying with the Distributor at mumbai who informs me that the Psaudio is demanding a huge amount of money for the spares. Mind you the unit was under warranty. My Connected equipment also was damaged. I just dont know how theses chaps get away with selling phoney stuff. BUYERS BEWARE

Thank you, Sir. U The Man. Thank you for remanding the trip lite.

I'd be happy if PS Audio said, we respect Amir's review, and we are going to start preparing a new wave of products that will be up to scratch. Thats all customers want to hear.

Thanks so much Amir, please keep doing what you do.

Our hobby needs people like Amir and audio science.

Amir, thanks so much for being light to these darkness (BS) P12, now we are all awake to PS Audio.

Power cable wasn't broken in.😢 Incorrect amplifier was used for measurement.😂 You didn't do a listen test.🤣 You failed to pour on enough snake oil.😎 Thanks, Amir. You do great work.

I've been reading ASR for awhile now, coming from Archimago. How did I miss your youtube channel?! I guess I wasn't paying attention.. Thanks for holding these companies accountable and for giving them free QA for everyone to see. I cant watch Paul anymore after seeing his behavior with this. Feels bad

Amir is wonderful. He's probably one of the single greatest resources out there for actual HONESTY and INTEGRITY when it comes to providing real information on audio products - information that consumers can actually rely on. Instead of scolding Amir for the work that he does, in reality, (if these audio companies where operating at a higher level) they would instead be HIRING him! He's doing the EXACT type of testing that THEY should be doing on their products before releasing them to market. He's providing the actual information that consumer need to see and review before they spend their hard-earned money on these technology products. Hats off to Amir and the work that he is doing with his detailed and technical reviews and analysis. Amir is a hero to consumers everywhere. What he is revealing with his work accurately tells the story of just exactly how much "snake oil" is really still out there in the world of high-end audio. Unfortunately, there is clearly FAR more than what most people realize.

Fabulous review !!!

That's an interesting reason for labelling an output as being for high current devices.

Great video Amir. Just found this channel, and it's informative, precise and clear. Using an NTC to limit inrush current is very common, but, given the dynamic characteristics of the load, they should have done it properly and also use a relay (or a SSR or whatever) to short the NTC after a short while and keep it closed until the current would drop to low values. This is not rocket science for a competent electronics designer, but of course it costs money in design, components and testing. Not that they are giving away their stuff for peanuts.

Very good review. Keep up your debunking channel. It's brilliant.

Thanks for your review. The public needs to see the real data. Congratulations on your system. It's very nice. Have you ever looked at the Plixar BAC or BDC products. Different engineering. Check out the BAC 3000

I am SO THANKFUL to you for your efforts in measuring audio equipment against the manufacturer claims!! IT has saved me money and I have happily donated to your site. If nothing else, it is an impetus for audio companies to show their true character. I hope it will make people more accountable and responsible to their customers and general public. It helps me make purchasing decisions and therefore gain a better listening experience! Thanks again Amir!

Oof, that was Rough. Thank you Amir, much appreciated.

Thanks for the review, I live in Australia where we use 240V, all the stuff I hear about these regenerators made me think the US power system was bad, and that running high end gear on 120V was not a good idea, as I had no issues over here on 240. There seems to be quite a few reviewers who say they can hear a difference, but as you say, never give any numbers to back it up. I am kind of running on hearsay, not good. thanks for the numbers, I will never be able to afford an Audioprecision analyzer and are forced to use my ears, Yes the ear test is important, but without being able to reduce things to numbers it makes improvements awfully hard, especially at the soldering iron level where I live as I cannot afford to just keep blindly buying stuff.

Years ago I purchased an Adcom ACE-615. With or without no difference in sound, the best thing it is good for is switching my components on and off...

I lost all respect for PS audio and I did think about buying one of their power amps

I bought the little P3 regenerator to test if it would solve an issue I am having with a dc component in my ac line. Periodically several of the transformers in my amps began to emit a mechanical hum, not in the audio stream. This was even more evident when I tried a 1KVA medical isolation transformer and for no apparent reason it would hum quite loudly. The power company denied that it was possible so no help from them. I removed the isolation transformer and installed the P3. I have 9 components which shared the 4 outputs. Before I even got to any testing, there was a distinct audio hum when 1 of my tube amps was switched on, and a high power SS amp's transformer still hummed mechanically. I removed the offending equipment and did some listening tests. No detectable change in audio quality. I was hoping for a reduction in vocal sibilance on a few of my test tracks. No help. Yes, the power regulation was quite good, but for this price I was expecting more. They graciously accepted my return. If I were living in a remote area of a less developed country this thing might actually be of some help. In fact I am sure it would. But not for me and my circumstances. I am new to your page and have enjoyed the clinical analysis you provide in your testing. I will have to say that I disagree with the USB cable tests. I bought a "better" as in higher priced cable between my PC and my DAC and it made vocals sound brittle and less smooth. Multiple cable swaps returned the same results. My 10 year old printer cable was clearly best. Thanks for your efforts to provide empirical data for those of us without access to such equipment.

Thanks for making these tests, they are very helpful. I was about to pull the trigger on the P12 over the weekend until I viewed this video as well as the PS Audio response which was not convincing at all. I've been trying to fix a sound degradation that occurs on a daily basis between 4pm and 9pm for the past five years. Listening experience drops from a 10 to a 3 or 4 out of 10. Dedicated lines, DC Blocker, Torus RM20, nothing works! When I have friends over at this time, they notice the muffled sound, then if they stay long enough in the evening, sound clears up. It very frustrating since this is the time when I do most listening... I was thinking maybe it's THD or that there is a TV and communications antenna about 4km from my place, could this have an influence on sound quality? Don't know what to do next... suggestions?

First off, thank you for everything you do. I wanted to ask if you would consider picking a standard test speaker and when testing kit, dacs. amps etc etc. you complete the test with it on that speaker. I think it would be great to see the difference each thing makes to the eventual output of the speaker. Most people will say about how a CD player is bright, or a DAC is warm etc. It would be good to see how each thing differs the sound output to the speaker. Appreciate you'd need to set a benchmark and choose a standard amp etc, but as long as that remains the same, we should be able to see differences if there are any. Just thought I'd add an edit, I understand your test do show the output of each kit, but people will often say two bits of kit which measure the same have a different sound, therefore I would be interested to see the actual speaker output of each, to potentially debunk claims (or not)

Hi We have a Koehler whole house standby generator. The transfer switch can sometimes make a buzzing sound possibly from the electric magnet switch that transfers power to and from the utility main line to the generator. I wonder if in a situation like mine it could make sense to have some sort of power conditioning. That said I haven’t noticed any sound degradation.

Very bad look for Paul and PS Audio. Thanks for the review and videos! Incredibly thorough

Thank you for this in depth analysis and taking your valuable time to explain the testing method for viewers. I will never buy anything from PS Audio.

What an absolute legend of a man.

Thank you for another great video :)

Amir, thank you so much for doing this. Though many things you said are beyond my high school physics understanding; you're bringing into the discussion measurable data that are both accurate and precise. And I trust these data more than any emotive and subjective observations.

Thank you Amir

Amir if possible can you elaborate what Pangea power cable you are referring to , you used description of thick cable , so I am assuming it’s the AC-9 AWG cable , I use pangea cables for my DAC and tube pre-amp. What is reason for use of this cable . Thank you your advice and testing have played an important role in my upgrades, one in particular is the SMSL M400 dac.

Excellent video. 👍

Thank you for all the hard work. I was considering one of these because I want to protect my system, is there a power management product you would recommend? For instance a pair of 1200W mono blocks?

My power suplly is: 2 X stationary batteries with 6v and 600ah each one. They are connected in série to 12v; 1 x 2kw linear high precision regulator to 40v; One set of super caps with 83 farad; 35 and 50mm Coper cables. My voltage is always linear Max 0.005/0,01 oscilation. The batteries and the super caps can supply more than 250ah momentaneous without voltage oscilation. I have not any AC stage. Can you tell me if a good power plant with AC can have better performance than my power supply? Thanks for your good work!

Thank you Amir. Glad to have you debunking and exposing all the high end audio snake oil.

I'm curious now if commonly recommended budget power conditioners like the Furman PST-6, PST-8's are negatively impacting performance. They more so advertise separate filter banks to isolate television noise, and surge suppression.

Great review Amir. I have a feeling the reason Amir didn't do a blind test is that he won't let anybody touch his babies without him looking at what they are doing....if I had those I wouldn't either , wow

I just watched the response video from PS audio, poor Bob! Thrown under the bus. This seems like a marketing hype problem. Pushing for a selling point, whilst not completely understanding the technicalities. Good work Amir to call out the BS. Lessons learnt in the industry.

I'm an electrical engineer who has been designing power distribution systems for many applications in many industries for over 40 years. These including manufacturing plants, laboratories, data centers, some of them mission critical so this is not an uninformed posting. There are nine different categories of power anomalies. If your equipment has the quality of power supplies with good line and load regulation and adequate filtering the only anomaly that will kill you is a power outage or power outside of the range of the power supply's specified input power requirements. I've designed power distribution for some of the most sensitive equipment in the world including electron microscopes, mass spectrometers, HPLC, machines that photographed individual atoms, and many others. I NEVER had a problem even once that required a special power cord or power conditioner except for a UPS and backup generator for mission critical loads. The gold standard for UPSs is the double static conversion UPS. If you don't have a power quality problem or if your equipment is capable of dealing with the power anomalies you encounter then no type of power quality improvement product will make any difference. Determining power quality anomalies you have to deal with requires investigation. The distortion and noise in your test was clearly inherent in the amplifier you used for your tests. Where I use UPSs my three go to manufacturers are Eaton, Liebert, and Mitsubishi. I think there is one double static conversion UPS from Eaton that will work on 240 volts AC single phase. The rest I've seen are all three phase for industrial use. All of those you see on the consumer market are line interactive types. They have much greater harmonic distortion but are perfectly good for your desktop PC. I never tried mine on audio equipment, never needed to but they might not work well. Unless you can duplicate the power quality anomalies from your utility power you cannot evaluate the merits of a device that is intended to improve power quality. Therefore in selecting one you need to evaluate the advantages and disadvantages of a device you are considering. My power quality is excellent so I don't even consider buying one. IMO if you are paying big bucks for audio equipment that can't correct for 8 of the 9 power anomalies with it's own power supply then you have been cheated, you've bought a bad design. We don't expect it from a $300 HT receiver but for a $10,000 power amplifier it had better provide clean constant DC voltage with an absolute minimum of voltage drop, noise, ripple, and other anomalies under any conditions of operation including with highly reactive loads and high reverse EMF. The measurements and specifications provided or published in this absurd industry are generally worthless. The proof is that there is no correlation between the measurements and the performance. Two amplifiers measuring identically on a test bench with 4 and 8 ohm resistive loads can perform very differently with an actual loudspeaker load. The measurements, the first thing I look at in a published review are mostly for entertainment as they really don't show what the equipment will do. They are a legacy from 80 years ago when they showed meaningful differences but are practically useless today. As for the testimonial reviews I consider them all but worthless. Even if I believed in their honesty I have no confidence in any of the reviewers.

0.008 ohms...? At a guess (and only a guess, but based on many years in electronics design) they are quoting the lowest possible on-resistance of the MOSFETs in the output driver stage. As a true measurement of the output impedance including any filters it is simply not credible without some further justification from PS Audio. Oh, and the pdf manual on their website says 0.005 ohms, so they are quoting two different figures...

Thank you

Amir, thank you for the thorough review. So what can we use to protect our expensive gear from power surges that will not degrade the sound of our equipment ? Will any power strip due ? or do you recommend something ?

Thanks for sharing interesting measurements. Not sure whether it makes sense to go after PS Audio if the thermistor might actually work normally, once the P12 is operated under normal operating conditions, ie with an amp connected and t least one source. Amir, that is impossible to judge by your audience. So, a quarter of the video has little meaning to me. I understand the distortion (which one?) remains unchanged on the amp, which is interesting, and might be meaningful for single devices (streamer amp). What i would be interesting in, is running source + an amp, under controlled and published noise levels in the net voltage and combined system function and distortion. These aspects seem not discussed in your report (instead there is considerable excess emotion*). *) in a previous post i suggested to put emotions aside when it comes to judgement of devices, particularly when done via listening. I want to add i really get somehow emotionalized (almost feel instigated) by choice of words and the way this report is presented. People relax! If (yes IF) PS Audio really wants to sell meaningless devices, i assume potential buyers, who listen first (and we all do, don’t we?) and are friends of their money, would decide against purchase of a P12 or similar, and might go for a lovely vacation instead. But so far PS A is in the market, and presumably so, because of being part of the properly engineering side of things.

Always enjoy your videos Amir. Curious about your listening room. Why no acoustic treatment? Great speakers. Seems like someone so into measurements and accuracy would want to have a semi-accurate room. Also you tend to do listening tests to speakers with them still coupled to your desk? Is that true? Or do you de-couple , align tweeters to ear level, use acoustics, create an equilateral triangle? Sorry, it’d be hard for me personally to take your listening tests even remotely seriously if you don’t. Your measurements I take 100% seriously.

Amir, you are the most important guy in the audio industry. Shame that respectable copmpanies choose this unscientific path.