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Impressions: SMSL PA200 GAN FET Class-D Power Amp

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That's no problem at all. A few personal conversations, documentation, notarized contracts including a binding non-disclosure agreement with a security deposit, and a six-figure investment (€ and $ are accepted) in the project.
Ah, the usual "I can't tell you, because it is our trade secret, but trust me". :)
 
But to be clear, I'm talking about small differences, sometimes just nuances, not these phrase-laden statements about differences like worlds apart, completely different, or something like that.
And these differences have become significantly smaller, especially in the last 5-10 years, which is a good thing. We checked this again last year with older devices.

You aren't being clear at all. If you are comparing amps with inaudible distortion, etc., then please explain the cause and the resultant difference in objective terms. Feel free to include your sample size and statistical significance of these differences.
 
Ah, the usual "I can't tell you, because it is our trade secret, but trust me". :)
You aren't being clear at all. If you are comparing amps with inaudible distortion, etc., then please explain the cause and the resultant difference in objective terms. Feel free to include your sample size and statistical significance of these differences.
Maybe it was simply a mistake to share something from this project.
I would have to have had a really bad day to write somewhere that someone should believe something or trust my statements. I don't influence such things, and that's up to each individual.

This is a project in which I and other participants have invested a great deal over the past decades. Of course, if it's successful, there will also be commercial benefits to be derived from it.
This is the reason why I share little information about it at this time. If someone doesn't understand that, that's just the way it is.

This is completely off-topic in this thread, and it wasn't my intention to spark a discussion about it.
If what I wrote rubs you the wrong way or bothers you so much, please excuse my posts on the topic.
You are also welcome to ask a moderator to delete my posts; I hereby consent to this.
 
Surely slew rate/rise time can influence how an amplifier is perceived. This is (probably) what to some makes these cheap chinese chip amps sound bad. The money/scope for good, adequate components is simply not there.
If an amp is capable of producing 20kHz at full voltage, then it is not slew rate limited.

An amp that is slew rate limited will create distortion. That will show in the normal distortion/power measurements.

“These cheap chinese chip amps” are also not slew rate limited. Nor do they (in general) sound bad.
 
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Maybe it was simply a mistake to share something from this project.
I would have to have had a really bad day to write somewhere that someone should believe something or trust my statements. I don't influence such things, and that's up to each individual.



This is completely off-topic in this thread, and it wasn't my intention to spark a discussion about it.
If what I wrote rubs you the wrong way or bothers you so much, please excuse my posts on the topic.
You are also welcome to ask a moderator to delete my posts; I hereby consent to this.
When you make statements that fly in the face of common sense and science, without offering the slightest proof, other than "trust me", you should expect people to ask for more. Know your audience!

What you wrote doesn't rub me the wrong way or bother me. Extraordinary claims without any objective proof simply pollute the body of knowledge, based on the scientific method, that drives this site. That is irresponsible and disrespectful to all who come here looking for fact based information.
 
When you make statements that fly in the face of common sense and science, without offering the slightest proof, other than "trust me", you should expect people to ask for more. Know your audience!

What you wrote doesn't rub me the wrong way or bother me. Extraordinary claims without any objective proof simply pollute the body of knowledge, based on the scientific method, that drives this site. That is irresponsible and disrespectful to all who come here looking for fact based information.
I mean if you're that badly offended, feel free to ask a mod to delete the thread/post. I'm not bothered, this is par for the course treatment I receive here at this site anyway.

-Ed
 
I'm not that badly offended, just pointing out the fact that unsubstantiated claims that fly in the face of common sense and science will of course be challenged, it's the nature of a site built on fact rather than subjective opinion. You seem to think you are receiving some sort of "treatment" here...Again, know your audience. Perhaps if your sensibilities run more to subjective opinion you might find a site more aligned with such discourse. There are plenty of them...
 
I'm not that badly offended, just pointing out the fact that unsubstantiated claims that fly in the face of common sense and science will of course be challenged, it's the nature of a site built on fact rather than subjective opinion. You seem to think you are receiving some sort of "treatment" here...Again, know your audience. Perhaps if your sensibilities run more to subjective opinion you might find a site more aligned with such discourse. There are plenty of them...
Not telling me anything I don't know here. You rightfully point out that this is the nature of the site--you wrongfully state that I am claiming to be receiving a specific treatment here. I am not. It's anyone who posts here in any manner outside of sheer roboticism. I post here not to avoid the usual objective assualt--I post here because there's not enough talk about the PA200s. Fortunately, it looks like I've finally sparked some degree of discussion. Discussion leads to interest.

Interest, hopefully, leads to an actual review--specifically here at this site, not at the dime-a-dozen more subjectively-focused sites that you pointed out exist.

Then we can discuss actual objective results. Results I willingly state that I am not equipped to provide.

But if we don't get the discussion started, then nothing will ever be said about these amps, because where there is no interest, there will be nothing.

-Ed
 
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Yes. Par for the course for anyone here who dares behave like a human with a heart, not just me. But that’s fine, let’s continue the soulless AI revolution. It’s unstoppable anyway.
"Anyone who disagrees with me must be a soulless AI. Only people who share my world view have a heart".

I just point out the word "Science" in the name of this forum.
 
I'm also one of those people who can't do anything with Hypex/Purifi amplifiers. I've heard more than 10 of the high-quality models, but I don't get the "I want one" feeling.
Last year, two friends came to see me and once again wanted to convince me of their (expensive) Hypex/Purifi amplifiers. What was the outcome? Both of them left with their heads hanging low and ordered the Sabaj A30a. Both then spent several weeks comparing and ultimately kept the A30a.
This has me intrigued! What makes these sabaj more appealing than the hypex/purifi and Texas Instruments based amps? Also it seems they're hard to find is there an updated model? Also was this comparison done using your blind testing protocol you mentioned?
 
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Yes. Par for the course for anyone here who dares behave like a human with a heart, not just me. But that’s fine, let’s continue the soulless AI revolution. It’s unstoppable anyway.

-Ed
Hi Ed. Unfortunately, as you've seen firsthand, these forums can be brutal at times. It's very unhealthy.

Anyway, I saw from your system you had a several matching SMSL devices and wasn't sure if you were aware that they now offer a a cute little streamer with a similar scalloped design motif:


They also offer two matching disk players (with and without internal DACS). They're adorable.

BTW, my second PA200 arrives Sunday. I can' wait to try them out. I have a pair of Kef R3 Meta (which Amir and others have proven measure quite well) and a pair of Magenpan 2.7i's (which haven't been measured by anyone, but I am confident measure quite poorly based one what little data I've seen from the closely related1.7i). Guess which one I usually prefer...

Oh, +5 brownie points for having a Nixie display!

-Lumi
 

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Hi Ed. Unfortunately, as you've seen firsthand, these forums can be brutal at times. It's very unhealthy.
If you consider this forum "unhealthy", what is your opinion of the typical "mutual reinforcement of common beliefs" audiophile forums?
 
Hi Ed. Unfortunately, as you've seen firsthand, these forums can be brutal at times. It's very unhealthy.

Anyway, I saw from your system you had a several matching SMSL devices and wasn't sure if you were aware that they now offer a a cute little streamer with a similar scalloped design motif:


They also offer two matching disk players (with and without internal DACS). They're adorable.

BTW, my second PA200 arrives Sunday. I can' wait to try them out. I have a pair of Kef R3 Meta (which Amir and others have proven measure quite well) and a pair of Magenpan 2.7i's (which haven't been measured by anyone, but I am confident measure quite poorly based one what little data I've seen from the closely related1.7i). Guess which one I usually prefer...

Oh, +5 brownie points for having a Nixie display!

-Lumi
Thanks; I did see that streamer, but I am happy with the WiiM. Ease of use is a thing. The CD players are nice, but I feel like that kind of money for the privilege of having to flip discs constantly is not for me, despite my huge collection of CDs gathering dust. My curated streaming playlists are not only more convenient, but much of the content is high-res lossless, better than redbook CD.

Erin’s Audio Corner did a review/measurement of the LRS+ and the video should be out any day now. I am a Patreon so got early access. It’s not exactly the 2.7, but I imagine it’s similar but the 2.7 has better bass extension.

I envy your R3 Metas! They were way out of my budget range. I got my LS50 Metas open-box at substantial discount.

-Ed
 
Literally higher sample rate and/or bit depth.
What makes that "better"? Do you think it makes an audible difference for normal, commercially recorded material (that has a dynamic range much less than 96 dB)?
 
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