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[Gallium Nitride amplifier] Impressions of the Mini Gan 5 by Premium Audio, pictures / video inside

mocenigo

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Just trying to understand....

It reminds me that someone here compared a Mark Levinson 333 to a Purifi and a Benchmark AHB2. According to the measurements on the various sites, including ASR, the Mark Levinson is far behind the first two amplifiers mentioned in reference.

From what I understood it is a blind test ) I imagine this type of test has some value

Here are the conclusions drawn from the person and which were hailed with much less criticism oddly ...
I take it that the person's credibility depends only on this blind test and that this blind test contradicts the measures? what happens next ?


"My personal conclusion:
Class D amplifiers have improved a lot of the years but Class D Amps are still no match to good design Class AB Amp.in term of sound quality and dynamic handling
Benchmark AHB2 is more versatile (good for all music) and more dynamic than the Class D Purifi Eigentakt
Class D Purifi Eigentakt is suitable for center channel, its slight compression and unnatural bias toward midrange makes dialogue more clear It is not an ideal amp for life classical music reproduction.
Mark Levinson 333 is the best despite its old age. It is the most life-like, with more weight on vocal , and more at ease when playing life recording classical orchestra at higher volume level
There needs to additional scientific measurements that can explain why the benchmark AHB2 sounds better than Purifi Eigentakt in my environment and why the levinson sounds more dynamic and detailed on loud classical music. Traditional SINAD, THD , IMD measurement using sinewave do not have the musical waverform complexity and can not explain the contrast of what we heard among these amplifiers in our environment. What we heard can not be explained with just THD measurement as they all sound good (not distorted) but different. As below certain THD, the delta is not audible."

Sometimes more linear amplifiers (or speakers) sound 1) "compressed", 2) "with a soundstage constrained in depth", 3) "lacking in midrange bloom" but at the same with an 4) "unnatural bias toward midrange" – in other words 1) harder clipping hence the differences between the louder peaks is smaller, instead of scaling them gradually, 2) lack of negative phase second harmonic distortion 3) less second harmonic which is esp audible in the voice range and 4) bass is not bloated, highs are not put forward, so it might seem in comparison that the midrange is instead put forward (even if not distorted).

Again, a bit of distortion in the "right" places may make the voicing of an amplifier more pleasing. Nothing wrong with that. It is a preference. And putting the "right" amount of distortion may be an art in itself. But as Papa Pass has shown, it does not have to be awfully expensive. Placing a premium for that feature is nowadays bordering on fraud, IMNSHO.
 

sychan

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Again, a bit of distortion in the "right" places may make the voicing of an amplifier more pleasing. Nothing wrong with that. It is a preference. And putting the "right" amount of distortion may be an art in itself. But as Papa Pass has shown, it does not have to be awfully expensive. Placing a premium for that feature is nowadays bordering on fraud, IMNSHO.

One of the reasons stated for people liking the sound of tube amps is that if their distortion emphasizes even harmonics, then it is considered euphonic (even if it isn't transparent). The MiniGAN seems to emphasize even harmonics
1633468941860.png
 

LeftCoastTim

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This entire thread supports my theory that most of us cannot hear -70dB distortion (0.02%). Since we can't, it doesn't take much "poetic language" to swing people's opinions (and bling and $$$$$$$).

Just reproducing CD's spec is hard enough. Hi-res is snake oil.
 
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daniboun

daniboun

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Here Tom's last answer.
If he assumes that the measurements announced are true and will therefore be republished on the site even after Amir's test, then I'm sure he'll return a new amp to Amir and we'll all be fixed.
If Tom keeps his promise then we should be able to have a second test and we can put aside the hypothesis of a faulty amp.

On the other hand, if I had been in Tom's place: I would have tested my amp a hundredfold before sending it to ASR.


 

Kachda

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Here Tom's last answer.
If he assumes that the measurements announced are true and will therefore be republished on the site even after Amir's test, then I'm sure he'll return a new amp to Amir and we'll all be fixed.
If Tom keeps his promise then we should be able to have a second test and we can put aside the hypothesis of a faulty amp.

On the other hand, if I had been in Tom's place: I would have tested my amp a hundredfold before sending it to ASR.


That’s nice, but why not publish their own measurements first?
 

Kachda

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shal

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AC Voltage Input 90 to 264VAC. Voltage Selectable from switch on bottom of the amplifier (from the manual).
The sentence in manual is
This switch can be changed for use un countries with either 110 VAC or 230 VAC (85 to 250 VAC)
.....
and must be set correctly before plugging in the amplifier

Difficult to understand if 85 to 250 VAC is Ok in all positions of the swith or not .
 

oivavoi

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This entire thread supports my theory that most of us cannot hear -70dB distortion (0.02%). Since we can't, it doesn't take much "poetic language" to swing people's opinions (and bling and $$$$$$$).

Just reproducing CD's spec is hard enough. Hi-res is snake oil.

Yap. There have been some successful attempts at identifying different amplifiers in blind tests, but many more blind tests have shown that people often can't differentiate between amps (excluding tube amps). In the grand scheme of things it just doesn't matter whether distortion is 60, 70 or 110 db down (even 40 db down will usually be masked by music). Noise and hiss is a different matter.

As someone said on this forum some time ago (@Blumlein 88 ?): don't sweat the small stuff.
 

pma

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The sentence in manual is


Difficult to understand if 85 to 250 VAC is Ok in all positions of the swith or not .

You want for me to copy and paste. It is absolutely clear that the switch is to be set to 110V or 230V

1633601375354.png


1633601406435.png


1633601451125.png


1633601543290.png


Though their technical description is inconsistent (220x230V etc.), it is clear what the user must do. Set to 110V in countries with 100-120V network (Japan, USA ...) or to 230V in countries with 220-240V net (EU ....). If the switch was set improperly, the review would be invalid.
 
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mhardy6647

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index.php

Though their technical description is inconsistent (220x230V etc.), it is clear what the user must do. Set to 110V in countries with 100-120V network (Japan, USA ...) or to 230V in countries with 220-240V net (EU ....). If the switch was set improperly, the review would be invalid.

in 2021 AD (or CE, if one prefers), this seems like the kind of thing that should either set itself or the amp shouild be provided with a smartphone app for the end user to do it.
:cool:

I mean, for cryin' out loud: don't Elon's and Jeff's and Richards' space capsules run via smartphone apps?

(OK, I am being facetious -- but not entirely facetious)
 
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daniboun

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index.php



in 2021 AD (or CE, if one prefers), this seems like the kind of thing that should either set itself or the amp shouild be provided with a smartphone app for the end user to do it.
:cool:

I mean, for cryin' out loud: don't Elon's and Jeff's and Richards' space capsules run via smartphone apps?

(OK, I am being facetious -- but not entirely facetious)


If that can reassure you, I am the first European to have bought this amp, I have received the product in the 220V position....
Although I must admit that the user manual seems confusing ...

I will still seem boring and considered an extraterrestrial ... but I've been using the Mini Gan for a month and I have almost all the high-end Class D on the market (Purifi / Hypex Ncore, and I even have all TPA3255 Jlester / DrMordor and Sabaj A20a and Poppulse T180 and more ...)
I can't seem to draw the analogy between what I perceive and what Amir's test returns to us. Yesterday I reconnected some other amps, I listened with a friend of mine and really I do not understand ... the Mini Gan sounds much better on all fronts than for example the Aiyima A07 or my Jlester which has been measured by ASR. Either I have a huge problem with my ears .. I have been a musician for more than 20 years or the model received by Amir is really defective, possible ?

I turned the question around to see if my perception was really truncated as well as that of my friends who listened to the Mini Gan, I found on a forum a person who compared the Mini Gan to the Peachtree Gan400. Should be interesting to read :



Either way, I would really like the manufacturer to live up to their word and send Amir an other new amp quickly to clear my doubts.
What bothers me the most in this story is that Tom does not have the courage to register here to answer questions ... so I will continue to share my correspondence with him.
 
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tonycollinet

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....... is that Tom does not have the courage to register here to answer questions ... so I will continue to share my correspondence with him......

In the interests of being kind, I'd replace the word "courage" with "time and energy". It is clear from one of your earlier posts that Tom is working like a dog (12+ hour 7 day weeks) which is not surprising for a small independent company trying to release a product.

I have no doubt he will have seen the negativity surrounding the test of the mini GaN. (not to mention floating heat-sinks)

In his shoes I'd not be able to bring myself to engage with that either, at least until things calm down a little.
 
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daniboun

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In the interests of being kind, I'd replace the word "courage" with "time and energy". It is clear from one of your earlier posts that Tom is working like a dog (12+ hour 7 day weeks) which is not surprising for a small independent company trying to release a product.

I have no doubt he will have seen the negativity surrounding the test of the mini GaN. (not to mention floating heat-sinks)

In his shoes I'd not be able to bring myself to engage with that either, at least until things calm down a little.

I see things a little differently ... The Mini Gan is the result of 3 years of R&D. In his place; I would take the time to answer because it is a bit about the survival of its brand image ... I am aware that it works a lot, but the Mini Gan is probably a flagship of the brand and therefore by definition they worked hard to develop it. I can not blame him if he does not want to respond on ASR, however, I expect the manufacturer to explain the measures claimed.
 

tonycollinet

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There's a difference between "explaining measures" and "answering questions from a baying mob". (As I guess he may well currently see us)
 
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daniboun

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asking questions about how he explains the measurements is still questioning ....

In short, let's wait for a possible new test with a new amp)
 

whislai

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Been thinking why the GAN sound different vs the SDS, most people think they want "accurate" high fidelity sound, I'm not so sure about that, you know we human always overestimate our ears sensitivity, more does not mean is good for you sometimes, so I'm guessing despite the old SDS might not as accurate as some of the top best measuring amps (e.g. Ncore Hypex), but it guarantee at least smoother and forgiving sound when matching gear.
 
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daniboun

daniboun

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Been thinking why the GAN sound different vs the SDS, most people think they want "accurate" high fidelity sound, I'm not so sure about that, you know we human always overestimate our ears sensitivity, more does not mean is good for you sometimes, so I'm guessing despite the old SDS might not as accurate as some of the top best measuring amps (e.g. Ncore Hypex), but it guarantee at least smoother and forgiving sound when matching gear.

Since I no longer really trust the data shared by the manufacturer, on paper I read this:


I guess @ 8 ohms :
SDS-500 : THD+N, 1W - 1KHz: 0.02%
Mini Gan : THD+N, 1W - 1KHz 0.006%
 
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