ummm… let me just say if you believe the popcorn is stale, well then so is …
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Looks like part 2 is up.
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Goodie
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Ahh Yes, here we go … Deja Vu all over again…
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But you can’t tell by tasting the popcorn.
You can only tell by measuring it. 
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He seems to pre-judge everything, including Paul’s replies. Calls him flippant and anything he says immaterial. Trash-talk to me.
A fundamental problem with Amir’s stated goal to disrupt the audiophile hifi market is that he seems to review hardly any audiophile components. So he’s not really disrupting. He seems to review mostly cheap Chinese made stuff and lots of headphones. A favourite pair are from Dan Clark. I understand these were previously called MrSpeakers. I have a pair of Aeon2, recommended on this forum years ago. They are very enjoyable.
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Can you imagine, painful as it may be, a meal with Amir and his followers?
Sorry, I can’t. I enjoy tasting my food and wine, NOT measuring it.
Same for my music.
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Yes and no. The in rush limiter will be out of the circuit after about 5 seconds even if there’s no load….so I am a bit befuddled how he got what he did. We have the exact same AP measurement system and do the measurements correctly and publish the results. I would use those as a guide because they were made without mystery.
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Or stuck in a lift? (sorry - elevator). I’d spike the drinks.
Given your background, we probably share disbelief in the mentality of these souls. When people behave like polite grown ups and respect each other things happen.
I had one yesterday. A product for our house was installed in December and has never worked properly. It’s a high quality global brand we’ve used for 20+ years. My supplier, who I’ve known ages and is excellent, could not get the UK people to resolve it.
So I did a video, put it on YouTube, and at 3:30pm sent the link to the European CEO with a VERY polite email. I received a most courteous and apologetic reply at 7pm (8pm his time) and at 9am this morning the UK Commercial Director called me. All was resolved in minutes. Their site engineer will be coming tomorrow morning as they want to see the problem directly, and he will measure and expedite a replacement product at a discounted price.
I shall probably accelerate purchasing some other of their products, which are twice the price.
Anyone can shout from the sidelines. People who build businesses are the ones who care most about their products and customers. Just like I experienced yesterday. @Paul is one of those.
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You don’t get one of those little 
's from me very often Mr. Segal.
Bravo/great post.
Cheers.
[Post-script: Curses! Your post was so good it made me forget and violate my oath to not post on this thread again. 
]
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I’m touched … truly!
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Don’t mention it.
[Oops! Foiled again/posted again.]
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I needed that. Perhaps you could just post it once a day. If I do it, it doesn’t quite feel the same.
As I said previously. he has the right tool…but he sometimes does not do the preparation needed to get the correct results. Either that, or he doesn’t know what he is doing.
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But how can that be unless you are using a relay or triac to bypass it? A thermistor type inrush limiter relies on heat from the load current to pull the series resistance down. No load, no heat, no resistance drop?
Personally I don’t like thermistor inrush limiters. I don’t want that in the circuit low resistance or not. What I did in two of my multi-channel amps is a power resistor with a timed relay bypass. But I understand one must consider otherwise small DIY costs add up in manufacturing.
Personally I prefer listening to vinyl, so for tomorrow I pass the torch. Takers?
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I’d trust Bascom King to measure the unit in question. He used to do measurements for one of the publications I believe. In the videos for the BHK amps, He relays a story of an amp from a DAC manufacturer (my guess is ThetA) that had the best measurements of any he had tried by far, but sounded terrible.
I believe power conditioners are the product that is the most system/location dependent. You hear of people who love a particular conditioner, and others who don’t like it. Someone may use it (like myself) in a very dense urban city condo and others may have no neighbors around, further from the transformer or closer, etc. Some may be able to ground their system and some like me can’t.
Hi Paul… published the results from the AP555 … I must have missed it? Would be fantastic to see that in this forum… looking forward.
Audio Engineer opinion (not biased towards PSA or ASR), but it looks like here most forum users totally ignore the ASR review to defend PS or their own buying decisions, without having a clue on what ASR did (perhaps they lack the needed technical knowledge, can’t blame them for that, we are not all engineers).
- the PA is doing the regeneration is meant for and ASR is confirming that.
- P12 is providing a cleaner supply and ASR is confirming that, including distorsion within spec.
- what ASR is measuring is the output of the amplifier connected to the P12 and shows no measurable difference of the signal with or without P12.
=> there are options to dive deeper from this point
- the raw AC was clean enough and therefore no need to have a P12 (statement also meant by ASR)
This also means that P12 “could” theoretically influence the sound if the raw AC parameter x/y go below/above certain limits => this data should be available @ PS, they would end this discussions by sharing them. - P12 has no positive influence on sound. If it has than it needs to be backed up by test data from PS, what / how much / in which conditions, what improvements it brings.
To the sensitive audiophiles here: if there is a difference, it must be reflected in the signal - high enough to make it audible.
AC signal gets to DC before being applied to the input, voltage amplification and final output stage of an amplifier. Unless full of noise, a bit of distortion on raw AC will not be “visible” on the DC supply rails of the amplifier after rectification + filtering + there is also power supply ripple rejection (PSRR) to account in…so there is a point on questioning the influence on the output signal of the amplifier.
A different perspective (1)
- A well designed amplifier “cleans-up” the noise from AC input with a properly designed power supply
- if you paid $x000 you should expect a very solid power supply in your amp
- having that already in place, makes power regeneration quite useless
A different perspective (2)
- if the P12 makes a difference in how an amplifier sounds it means that the amplifier is poorly designed
- so you would need to buy a 5000 $ P12 to clean the power for a 50$ worth of an amplifier. Who would do that ? Most of the people buying a power regenerator already have expensive audio equipment which they want to complement with such a device to improve it further.
A different perspective(3)
- the responsible device for sound “coloring” is the amplifier, not the power supply (AC). same effects like the ones a tone control has on certain frequencies (amplification/attenuation).
- what some people do not understand is that an amplifier must provide an amplified signal without any distortion, coloring or noise. The user can use a pre-amp if they like more colorful sound. This is a matter of taste but the color should be optional(by a pre-amp) and not by default in the power stage (not all users like the same colors…)
- The amp can distort, can have non-linearities, can have certain frequencies amplified or attenuated more than others which make them sound different compared to the source. At best, the influence of the raw AC is in the noise + AC amplitude (affecting the output power mainly).
- if a power regenerator changes the way an amplifier sounds - you should buy another amplifier
This is not a criticism towards PS or support of ASR, but the discussion should be a technical one first and here we have seen measurements only from one side, so far.
Happy to hear valid comments, backed by some actual engineering experience…
The reason why measurements are important is to have a common language to compare specifications with measurable and reproduceable data. Otherwise it is a matter of taste and then, it’s “what I like vs what you like” type of discussion where nobody has an argument to say their opinion is better - because it is just a personal opinion.
Many people here claim that measurements are not important, sound is more important need to understand that they have the right to say that for themselves but not to make others believe it will sound better for them as well so measurements puts the individual perception aside and follows objective data which is the same for all.
Again, if you like colors, buy a pre-amp with 16-band equalizer and customize the sound to your taste, but do not make claims that your settings are better than other people’s settings or in general they are better.
If you know a bit of engineering, ASR does a great job measuring devices. PS does great products. PS can do the same. or other measurements to backup their claims on the influence the P12 makes on sound. And they should do, as they are charging customers with big bucks for their products.
I work in automotive industry - if the customer claims that our device does not meet the specs, I describe the test setup and share the results. I also ask their test setup and measurements to be able to reproduce. in this way, we have a fact based discussion and avoid useless discussions, like these ones here…
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