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

Lattiboy

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Could we have one goddamn thread that doesn't re-tread the same arguments that I've been hearing for a decade? Oh, we cant? Because you are sure that next time you say "My 'golden ears' are objective measurements!" or "Beyond the audible threshold" the entirety of audiophilia is going to stand up and clap while carrying you off on their shoulders?
 

Lattiboy

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And yes, I know that on a bunch of other sites aimed at fools with too much money you have to hear about how some 75 year old guy is SURE that his $12,000 power cable "brought out the airy highs and increased dynamics" of his DAC when his ass can't hear past 8000Hz, but we don't have to be the dark twin of that!
 

fpitas

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Could we have one goddamn thread that doesn't re-tread the same arguments that I've been hearing for a decade? Oh, we cant? Because you are sure that next time you say "My 'golden ears' are objective measurements!" or "Beyond the audible threshold" the entirety of audiophilia is going to stand up and clap while carrying you off on their shoulders?
I'll state the obvious. Sometimes we have a troll problem. Yes, even on ASR.
 

DonR

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As long as people continue to post subjective impressions as meaningful, I will push back. OP says amp sounds "less harsh". What can one learn from that statement? How can we judge its usefulness if we don't know the limits of his hearing? His listening training? What was his mood at the time of listening as compared to times when he listened to "more harsh" amplifiers?
 

Lattiboy

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As long as people continue to post subjective impressions as meaningful, I will push back. OP says amp sounds "less harsh". What can one learn from that statement? How can we judge its usefulness if we don't know the limits of his hearing? His listening training? What was his mood at the time of listening as compared to times when he listened to "more harsh" amplifiers?

I read this in Data's voice from Star Trek.
 

sq225917

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I think we need a moratorium on subjective commentary beyond the use of versions of the following, " I liked how it sounded- more, less, just as much, not at all" everything else should be banned.
 

beren777

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As long as people continue to post subjective impressions as meaningful, I will push back. OP says amp sounds "less harsh". What can one learn from that statement? How can we judge its usefulness if we don't know the limits of his hearing? His listening training? What was his mood at the time of listening as compared to times when he listened to "more harsh" amplifiers?

Is there even a standard definition for what "harsh" is or how it is measured? Was it 1.22 catlucks more harsh than the other amp?
 

SIY

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Could we have one goddamn thread that doesn't re-tread the same arguments that I've been hearing for a decade?
More like 4-5 decades. Same bullshit excuses.

Controls take all the fun out of storytelling.
 

catluck

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Hi amigos,

Got my Mini Gan amp. As usual, it is with pleasure that I share my enthusiasm and some first impressions ) Before starting, I recall what theoretically could bring GaN VS traditional silicon transistors (to take up what was mentioned by Orchard Audio) :

Less harshness
Cleaner highs
Better transparency
Higher detail

This is because GaN transistors have much better characteristics over their silicon counterparts:

Increased slew rate
Reduced ringing
Faster switching
Faster overload recovery

Amplifier performance is improved by the use of GaN technology:

Decreased noise
Less distortion
Better transient response
Higher bandwidth


So all this is in the form but in fact what does it looks like? To avoid price / performance ratio debates, I just want to remind you that Gan Amps are not widely used and it is clear that we are paying a high price at the start (And prices will go up with the shortage of electronic components). But to put it in perspective, the closest competitor to the Mini Gan 5 is probably the Peachtree G400, which shares very similar specs @ $3000. and count about 1000 euros for a Mini Gan 5 exported to Europe.

Another point to note: Premium audio is part of ClassDaudio, the Mini Gan is made in the USA (CA).
I ve been told that the team spent about 3 years in R&D for this amp. Keep in mind that this is a discrete amp with about 600 parts on it !

I received the last version, with a green PCB, against red PCB on the first revisions. There were only minor evolutions on the PCB and on they only update the inductors. For the rest, everything is the same. Premium Audio announces a 600W SMPS Bipolar LLC PSU it remains to be confirmed... =) PSU MOSFET : FDPF18N50T = 18 A 500 V with no heatsink, so probably less...

The amp is really well cut and very compact, comes in a gray aluminum case, with a powder paint. It's sober, it seems solid.

On the other hand, I deplore the minimalist packaging, poorly protected and no IEC power cable included. What a pity in terms of the customer window...
Not sure about the needs of heatsink see the pictures below and you will understand )

One thing that's really cool is the ability to adjust the gain - 26dB, 28dB, and 32dB It can be easily associated with any type of DAC / preamp )

Here the spec and global measures :


THD+N 5W , 1Khz : 0.004%
THD+N 10W 20-20Khz : 0.005%
THD+N 100W 20-20Khz : 0.008%
SNR: 108dB Unweighted 110dB A-weighted


Gallium Nitride Class D Amplifier
Fully balanced, dual Mono configuration
discrete amp with about 600 parts on it
Buffer : OPA LM4562
RMS Power Per Channel 8 Ohms 200 WRMS Continuous (400W Peak)
RMS Power Per Channel 4 Ohms 300 WRMS Continuous (500W Peak)
Power Supply 600W Bipolar LLC Resonant Converter
Input Sensitivity 2 VRMS
Frequency Response 20 Hz – 20 kHz, ±0.5 dB
Input Impedance RCA 100K
Input Impedance XLR 100K
Voltage Gain Adjustable - 26dB, 28dB, and 32dB
Power Requirements 190VAC or 264VAC
Dimensions (W x D x H) Inches 9.75" X 7.5" X 2"
Dimensions (W x D x H) Millimeters 248 X 178 X 51
Product Weight (lbs/kg) 5/2.3
Made in the USA


My Setup :

Gustard A18 AK4499 Dac > Fully balanced mode
Source : Audio HD files
Player : LG V30 via LDAC BT
Mini Gan amplifier @ Medium Gain > balanced inputs
Handemade Floor speakers @ 93DB / 2.5 way with Ribbon tweeters
SC-Orbit 240 MKII cables

Regarding listening, I took some reference titles with which I am used to juggling, in particular with my Hypex Ncore, Sabaj Dual Merus and my Purifi.
I listen to a lot of things, I love Jazz and I love electro pop, rock and latin music. I have been a musician for years and beyond acoustic measures, I appreciate "the tonal and musical" properties of an amp, which the Sabaj A20 has done very well!


Fausto Mesolella > Van Gogh
it is a title which is really close to my heart, with a sublime orchestration and this "typical Italian voice" which has always made me vibrate. By the way; I used this title when I exhibited DrMordor's TPA3255 in the showroom of "la maison du hauteur", a well-known store in France.

Yellowjackets and WDR Big Band > Downtown
Complex title, it often puts the amps to the test. I like to listen to it at a sustained volume, it is a rhythmic piece full of life.

Drums&Percussion Hi Res > That's because I'm a drummer and I'm very sensitive to the transcription of percussions, cymbals and rides etc, anything that sings at the top of the spectrum) My ears are rather expert therefore even despite my 43 years =))))

On these few titles of references, here is what I can tell you hastily, knowing that I received the amplifier recently and that it turned around ten hours.
What I feel, I wouldn't go into the subjectivity debate !

Very first point: the amp is absolutely dead silent, just like the Sabaj A20 or my Purifi and Hypex.

Treble and highs notes :

It is very balanced and on all the titles. It naturally sounds good. Compared to the Sabaj A20, where I had to adjust the treble slightly, here the re-transcription of rides, cymbals and high notes is simply natural and very clean.

On the track "Downtown", the highest notes stand out well from the rest of the mix. I would say that compared to the Sabaj A20, it stands out more on the front of the stage. Both amps are excellent here; I prefer them to my Hypex Ncore.

Medium :

It's very good, Fausto Mesolella's voice is transcribed very naturally, it stands out well in the mix. All the same observation here: we are more on the front of the stage compared to the Sabaj A20. So I would tend to think that the Soundstage of the Mini Gan is more centered (so to speak) or we could just as well say that the opening of the soundstage is less wide. In any case the Mediums are very good and it does not blush in the face of the Purifi for example.

Bass :

This is where we feel the potential of this Mini Gan, it's very "punchy" and full of reserve. I think the advertised 200W / 8R is there ... but to be measured. I pushed it yesterday at high volume, without destroying my timpans; it's clean, very clean, the bass is present with a super nice balance. I think my speakers go really well with this Mini Gan here and in all sincerity I love what I hear! I would confirm this feeling after listening to electro pop). In any case, I am a step above my Hypex Ncore modules and the same observation for the Sabaj A20


Soundstage :

Regarding this point, I think the Sabaj A20 is really a little bomb; especially with regard to its price)
The Mini Gan is great too, but keep in mind that it "swings" more on the front of the stage. And I think the LM4562 op amps has a lot to do with it. It might be a little more natural with respect to a close listening for example


To conclude :

The Mini Gan: it is a very transparent amp and full of reserve (really powerful). In my opinion it can drive a good number of speakers. It's an amp that sounds straight with no harshness and a very wide bandwidth.
I was particularly amazed by its potential for listening at sustained volume, where it is excellent at the lower end of the spectrum with clean and well present bass.

As for its price, I'll let you judge ... )

Videos :

https://streamable.com/mt8ymp

https://streamable.com/kyus8z


Pictures :









Hi amigos,

Got my Mini Gan amp. As usual, it is with pleasure that I share my enthusiasm and some first impressions ) Before starting, I recall what theoretically could bring GaN VS traditional silicon transistors (to take up what was mentioned by Orchard Audio) :

Less harshness
Cleaner highs
Better transparency
Higher detail

This is because GaN transistors have much better characteristics over their silicon counterparts:

Increased slew rate
Reduced ringing
Faster switching
Faster overload recovery

Amplifier performance is improved by the use of GaN technology:

Decreased noise
Less distortion
Better transient response
Higher bandwidth


So all this is in the form but in fact what does it looks like? To avoid price / performance ratio debates, I just want to remind you that Gan Amps are not widely used and it is clear that we are paying a high price at the start (And prices will go up with the shortage of electronic components). But to put it in perspective, the closest competitor to the Mini Gan 5 is probably the Peachtree G400, which shares very similar specs @ $3000. and count about 1000 euros for a Mini Gan 5 exported to Europe.

Another point to note: Premium audio is part of ClassDaudio, the Mini Gan is made in the USA (CA).
I ve been told that the team spent about 3 years in R&D for this amp. Keep in mind that this is a discrete amp with about 600 parts on it !

I received the last version, with a green PCB, against red PCB on the first revisions. There were only minor evolutions on the PCB and on they only update the inductors. For the rest, everything is the same. Premium Audio announces a 600W SMPS Bipolar LLC PSU it remains to be confirmed... =) PSU MOSFET : FDPF18N50T = 18 A 500 V with no heatsink, so probably less...

The amp is really well cut and very compact, comes in a gray aluminum case, with a powder paint. It's sober, it seems solid.

On the other hand, I deplore the minimalist packaging, poorly protected and no IEC power cable included. What a pity in terms of the customer window...
Not sure about the needs of heatsink see the pictures below and you will understand )

One thing that's really cool is the ability to adjust the gain - 26dB, 28dB, and 32dB It can be easily associated with any type of DAC / preamp )

Here the spec and global measures :


THD+N 5W , 1Khz : 0.004%
THD+N 10W 20-20Khz : 0.005%
THD+N 100W 20-20Khz : 0.008%
SNR: 108dB Unweighted 110dB A-weighted


Gallium Nitride Class D Amplifier
Fully balanced, dual Mono configuration
discrete amp with about 600 parts on it
Buffer : OPA LM4562
RMS Power Per Channel 8 Ohms 200 WRMS Continuous (400W Peak)
RMS Power Per Channel 4 Ohms 300 WRMS Continuous (500W Peak)
Power Supply 600W Bipolar LLC Resonant Converter
Input Sensitivity 2 VRMS
Frequency Response 20 Hz – 20 kHz, ±0.5 dB
Input Impedance RCA 100K
Input Impedance XLR 100K
Voltage Gain Adjustable - 26dB, 28dB, and 32dB
Power Requirements 190VAC or 264VAC
Dimensions (W x D x H) Inches 9.75" X 7.5" X 2"
Dimensions (W x D x H) Millimeters 248 X 178 X 51
Product Weight (lbs/kg) 5/2.3
Made in the USA


My Setup :

Gustard A18 AK4499 Dac > Fully balanced mode
Source : Audio HD files
Player : LG V30 via LDAC BT
Mini Gan amplifier @ Medium Gain > balanced inputs
Handemade Floor speakers @ 93DB / 2.5 way with Ribbon tweeters
SC-Orbit 240 MKII cables

Regarding listening, I took some reference titles with which I am used to juggling, in particular with my Hypex Ncore, Sabaj Dual Merus and my Purifi.
I listen to a lot of things, I love Jazz and I love electro pop, rock and latin music. I have been a musician for years and beyond acoustic measures, I appreciate "the tonal and musical" properties of an amp, which the Sabaj A20 has done very well!


Fausto Mesolella > Van Gogh
it is a title which is really close to my heart, with a sublime orchestration and this "typical Italian voice" which has always made me vibrate. By the way; I used this title when I exhibited DrMordor's TPA3255 in the showroom of "la maison du hauteur", a well-known store in France.

Yellowjackets and WDR Big Band > Downtown
Complex title, it often puts the amps to the test. I like to listen to it at a sustained volume, it is a rhythmic piece full of life.

Drums&Percussion Hi Res > That's because I'm a drummer and I'm very sensitive to the transcription of percussions, cymbals and rides etc, anything that sings at the top of the spectrum) My ears are rather expert therefore even despite my 43 years =))))

On these few titles of references, here is what I can tell you hastily, knowing that I received the amplifier recently and that it turned around ten hours.
What I feel, I wouldn't go into the subjectivity debate !

Very first point: the amp is absolutely dead silent, just like the Sabaj A20 or my Purifi and Hypex.

Treble and highs notes :

It is very balanced and on all the titles. It naturally sounds good. Compared to the Sabaj A20, where I had to adjust the treble slightly, here the re-transcription of rides, cymbals and high notes is simply natural and very clean.

On the track "Downtown", the highest notes stand out well from the rest of the mix. I would say that compared to the Sabaj A20, it stands out more on the front of the stage. Both amps are excellent here; I prefer them to my Hypex Ncore.

Medium :

It's very good, Fausto Mesolella's voice is transcribed very naturally, it stands out well in the mix. All the same observation here: we are more on the front of the stage compared to the Sabaj A20. So I would tend to think that the Soundstage of the Mini Gan is more centered (so to speak) or we could just as well say that the opening of the soundstage is less wide. In any case the Mediums are very good and it does not blush in the face of the Purifi for example.

Bass :

This is where we feel the potential of this Mini Gan, it's very "punchy" and full of reserve. I think the advertised 200W / 8R is there ... but to be measured. I pushed it yesterday at high volume, without destroying my timpans; it's clean, very clean, the bass is present with a super nice balance. I think my speakers go really well with this Mini Gan here and in all sincerity I love what I hear! I would confirm this feeling after listening to electro pop). In any case, I am a step above my Hypex Ncore modules and the same observation for the Sabaj A20


Soundstage :

Regarding this point, I think the Sabaj A20 is really a little bomb; especially with regard to its price)
The Mini Gan is great too, but keep in mind that it "swings" more on the front of the stage. And I think the LM4562 op amps has a lot to do with it. It might be a little more natural with respect to a close listening for example


To conclude :

The Mini Gan: it is a very transparent amp and full of reserve (really powerful). In my opinion it can drive a good number of speakers. It's an amp that sounds straight with no harshness and a very wide bandwidth.
I was particularly amazed by its potential for listening at sustained volume, where it is excellent at the lower end of the spectrum with clean and well present bass.

As for its price, I'll let you judge ... )

Videos :

https://streamable.com/mt8ymp

https://streamable.com/kyus8z


Pictures :








I thought I might weigh in on the Premium Audio mini Gan 5. After reading Daniboun's comments, and fully aware of Amir's really troubling measurements, I contacted Tom Rost at Class D Audio to discuss. Tom suggested that the unit Amir measured was "broken." Although I found Tom's other answers to my questions less than compelling, Class D Audio allows a 15-day trial period. So, for the total shipping cost of $32 I could try this "new" technology and decide for myself. I ordered a pair of mini Gan 5's ($1,400) to use as monoblocks. Tom indicates that as monoblocks they output 300 watts @ 8ohms and 400 watts @ 4ohms. To be truthful, I was expecting, yes the dreaded BIAS!!, the units to be less, far less in fact, than what they were advertised to be, i.e., class A quality (?), audiophile quality, SOTA, and so on. After several email inquiries/responses with Tom, I wanted to be generous but Amir’s measurements on ASR really troubled me. Nonetheless, I ordered a pair and several days ago I received a large box containing two small boxes each housing a diminutive, solidly built albeit sober 5 lb. amp. No audiophile jewelry here and, frankly, I’m grateful for that. Upon hook-up and initial turn on, only a barely, and I mean just barely, discernable hiss with my ear almost touching the tweeter cover of Spatial Audio Sapphire M3's. The internal blue led's indicated the amps were operating - SO FAR SO GOOD. I waited several hours and then couldn't help myself. Put on Ben Webster "Stormy Weather" and, and,................................., I was astonished. Ben's sax was utterly corporeal, burnished, with the most life-like tone color and dynamics I've heard. As Daniboun noted, the bass is also exemplary. I won’t claim that the M3's may as well be different speakers with these amps, but.... I hadn’t heard them sounding this musical before. Every aspect of sound reproduction is enhanced. The bass is substantially more alive - propulsive, dense tone, with excellent texture and pitch definition. String tone is sweet and superbly textured. Instrument placing across the soundstage is precise and well differentiated. Listening to the Baz Trio, an exceptional recording of a great piano trio, and, again, just sat transfixed. Piano tone is dense, rich, pure with superb dynamic scaling. Same with Charlap _ "Notes from New York." Bass is really noticeably more present. Listened to Lovano, Monk, Miles, Charlap, Evans, Pepper, Baker, etc. Brass, particularly on well recorded fare, is remarkably portrayed. Snare has greater snap and definition. The sound is utterly refined and by that I guess I mean no discernable noise, hash, grit, grain, glare, edge - nothing one would ordinarily associate with class D. This ain’t your father’s class D. All listenings were revelatory compared to previous listenings. The clarity, transparency, and resolution are among the best I’ve heard from any circuit topology. In fact, last night I got up around midnight just to come downstairs and listen. Haven't done that in probably 25 years. I've run the M3's with (a sampling but not all kit): tubes (Psvane 845, VTL 6550's), class D mosfet (Bel Canto eRef 600's), and class A sand amps (Pass, Sim Audio, Levinson) - all as monoblocks. Even so, these 5 lb. toys are not just competitive but, IMO, superior to all I’ve owned. And it's not like you have to ponder, stroke your beard and look to heaven for signs. Upon the first hearing it seemed rather obvious. Like Daniboun, I don't care to, and won't, get into the subjective/objective debate. Yes, ceteris paribus, I would prefer kit with superior objective measurements. But, as noted in the opinion piece (As We See It) in the Jan., 2019 issue of Stereophile (Vol.42, No.1), too many unanswered questions about measurements and their relationship/impact on audio quality and listening preferences. In truth, I just don't give a shit anymore. As I noted elsewhere in this forum, I want to be ravished by music and if it sounds good, I don't care if it's generated by mice spinning a wheel. These amps have transformed my system. I don’t mean to gush but when the listening experience is elevated in this fashion, I can't help myself. I’m just reporting what I’m hearing and maybe for the benefit of others. I understand the objectivists will howl and curse my name as they dance around a bonfire under the full moon. Don’t care. Think I'm full of shit? Maybe I am - but all you need to do is try gallium nitride GanFets.. As noted I went with Tom at Class D Audio and confirmed a trial period of 15 days as advertised on the website. If you try this product and don't agree with me, in the worst case you're out $32 for shipping. But, be prepared to keep the units because you may find your listening experience transformed. BTW, I'm not affiliated or associated in any way with Premium Audio or Class D Audio.
 

SIY

Master Contributor
Technical Expert
Joined
Apr 6, 2018
Messages
8,686
Likes
19,696
Location
Alfred, NY
I thought I might weigh in on the Premium Audio mini Gan 5. After reading Daniboun's comments, and fully aware of Amir's really troubling measurements, I contacted Tom Rost at Class D Audio to discuss. Tom suggested that the unit Amir measured was "broken." Although I found Tom's other answers to my questions less than compelling, Class D Audio allows a 15-day trial period. So, for the total shipping cost of $32 I could try this "new" technology and decide for myself. I ordered a pair of mini Gan 5's ($1,400) to use as monoblocks. Tom indicates that as monoblocks they output 300 watts @ 8ohms and 400 watts @ 4ohms. To be truthful, I was expecting, yes the dreaded BIAS!!, the units to be less, far less in fact, than what they were advertised to be, i.e., class A quality (?), audiophile quality, SOTA, and so on. After several email inquiries/responses with Tom, I wanted to be generous but Amir’s measurements on ASR really troubled me. Nonetheless, I ordered a pair and several days ago I received a large box containing two small boxes each housing a diminutive, solidly built albeit sober 5 lb. amp. No audiophile jewelry here and, frankly, I’m grateful for that. Upon hook-up and initial turn on, only a barely, and I mean just barely, discernable hiss with my ear almost touching the tweeter cover of Spatial Audio Sapphire M3's. The internal blue led's indicated the amps were operating - SO FAR SO GOOD. I waited several hours and then couldn't help myself. Put on Ben Webster "Stormy Weather" and, and,................................., I was astonished. Ben's sax was utterly corporeal, burnished, with the most life-like tone color and dynamics I've heard. As Daniboun noted, the bass is also exemplary. I won’t claim that the M3's may as well be different speakers with these amps, but.... I hadn’t heard them sounding this musical before. Every aspect of sound reproduction is enhanced. The bass is substantially more alive - propulsive, dense tone, with excellent texture and pitch definition. String tone is sweet and superbly textured. Instrument placing across the soundstage is precise and well differentiated. Listening to the Baz Trio, an exceptional recording of a great piano trio, and, again, just sat transfixed. Piano tone is dense, rich, pure with superb dynamic scaling. Same with Charlap _ "Notes from New York." Bass is really noticeably more present. Listened to Lovano, Monk, Miles, Charlap, Evans, Pepper, Baker, etc. Brass, particularly on well recorded fare, is remarkably portrayed. Snare has greater snap and definition. The sound is utterly refined and by that I guess I mean no discernable noise, hash, grit, grain, glare, edge - nothing one would ordinarily associate with class D. This ain’t your father’s class D. All listenings were revelatory compared to previous listenings. The clarity, transparency, and resolution are among the best I’ve heard from any circuit topology. In fact, last night I got up around midnight just to come downstairs and listen. Haven't done that in probably 25 years. I've run the M3's with (a sampling but not all kit): tubes (Psvane 845, VTL 6550's), class D mosfet (Bel Canto eRef 600's), and class A sand amps (Pass, Sim Audio, Levinson) - all as monoblocks. Even so, these 5 lb. toys are not just competitive but, IMO, superior to all I’ve owned. And it's not like you have to ponder, stroke your beard and look to heaven for signs. Upon the first hearing it seemed rather obvious. Like Daniboun, I don't care to, and won't, get into the subjective/objective debate. Yes, ceteris paribus, I would prefer kit with superior objective measurements. But, as noted in the opinion piece (As We See It) in the Jan., 2019 issue of Stereophile (Vol.42, No.1), too many unanswered questions about measurements and their relationship/impact on audio quality and listening preferences. In truth, I just don't give a shit anymore. As I noted elsewhere in this forum, I want to be ravished by music and if it sounds good, I don't care if it's generated by mice spinning a wheel. These amps have transformed my system. I don’t mean to gush but when the listening experience is elevated in this fashion, I can't help myself. I’m just reporting what I’m hearing and maybe for the benefit of others. I understand the objectivists will howl and curse my name as they dance around a bonfire under the full moon. Don’t care. Think I'm full of shit? Maybe I am - but all you need to do is try gallium nitride GanFets.. As noted I went with Tom at Class D Audio and confirmed a trial period of 15 days as advertised on the website. If you try this product and don't agree with me, in the worst case you're out $32 for shipping. But, be prepared to keep the units because you may find your listening experience transformed. BTW, I'm not affiliated or associated in any way with Premium Audio or Class D Audio.
I wouldn’t say “full of shit,” but rather sold on an idea rather than reality, an idea common in a small niche of audio, but based on really poor evaluation methods.
 

goryu

Active Member
Joined
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Messages
144
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101
I thought I might weigh in on the Premium Audio mini Gan 5. After reading Daniboun's comments, and fully aware of Amir's really troubling measurements, I contacted Tom Rost at Class D Audio to discuss. Tom suggested that the unit Amir measured was "broken." Although I found Tom's other answers to my questions less than compelling, Class D Audio allows a 15-day trial period. So, for the total shipping cost of $32 I could try this "new" technology and decide for myself. I ordered a pair of mini Gan 5's ($1,400) to use as monoblocks. Tom indicates that as monoblocks they output 300 watts @ 8ohms and 400 watts @ 4ohms. To be truthful, I was expecting, yes the dreaded BIAS!!, the units to be less, far less in fact, than what they were advertised to be, i.e., class A quality (?), audiophile quality, SOTA, and so on. After several email inquiries/responses with Tom, I wanted to be generous but Amir’s measurements on ASR really troubled me. Nonetheless, I ordered a pair and several days ago I received a large box containing two small boxes each housing a diminutive, solidly built albeit sober 5 lb. amp. No audiophile jewelry here and, frankly, I’m grateful for that. Upon hook-up and initial turn on, only a barely, and I mean just barely, discernable hiss with my ear almost touching the tweeter cover of Spatial Audio Sapphire M3's. The internal blue led's indicated the amps were operating - SO FAR SO GOOD. I waited several hours and then couldn't help myself. Put on Ben Webster "Stormy Weather" and, and,................................., I was astonished. Ben's sax was utterly corporeal, burnished, with the most life-like tone color and dynamics I've heard. As Daniboun noted, the bass is also exemplary. I won’t claim that the M3's may as well be different speakers with these amps, but.... I hadn’t heard them sounding this musical before. Every aspect of sound reproduction is enhanced. The bass is substantially more alive - propulsive, dense tone, with excellent texture and pitch definition. String tone is sweet and superbly textured. Instrument placing across the soundstage is precise and well differentiated. Listening to the Baz Trio, an exceptional recording of a great piano trio, and, again, just sat transfixed. Piano tone is dense, rich, pure with superb dynamic scaling. Same with Charlap _ "Notes from New York." Bass is really noticeably more present. Listened to Lovano, Monk, Miles, Charlap, Evans, Pepper, Baker, etc. Brass, particularly on well recorded fare, is remarkably portrayed. Snare has greater snap and definition. The sound is utterly refined and by that I guess I mean no discernable noise, hash, grit, grain, glare, edge - nothing one would ordinarily associate with class D. This ain’t your father’s class D. All listenings were revelatory compared to previous listenings. The clarity, transparency, and resolution are among the best I’ve heard from any circuit topology. In fact, last night I got up around midnight just to come downstairs and listen. Haven't done that in probably 25 years. I've run the M3's with (a sampling but not all kit): tubes (Psvane 845, VTL 6550's), class D mosfet (Bel Canto eRef 600's), and class A sand amps (Pass, Sim Audio, Levinson) - all as monoblocks. Even so, these 5 lb. toys are not just competitive but, IMO, superior to all I’ve owned. And it's not like you have to ponder, stroke your beard and look to heaven for signs. Upon the first hearing it seemed rather obvious. Like Daniboun, I don't care to, and won't, get into the subjective/objective debate. Yes, ceteris paribus, I would prefer kit with superior objective measurements. But, as noted in the opinion piece (As We See It) in the Jan., 2019 issue of Stereophile (Vol.42, No.1), too many unanswered questions about measurements and their relationship/impact on audio quality and listening preferences. In truth, I just don't give a shit anymore. As I noted elsewhere in this forum, I want to be ravished by music and if it sounds good, I don't care if it's generated by mice spinning a wheel. These amps have transformed my system. I don’t mean to gush but when the listening experience is elevated in this fashion, I can't help myself. I’m just reporting what I’m hearing and maybe for the benefit of others. I understand the objectivists will howl and curse my name as they dance around a bonfire under the full moon. Don’t care. Think I'm full of shit? Maybe I am - but all you need to do is try gallium nitride GanFets.. As noted I went with Tom at Class D Audio and confirmed a trial period of 15 days as advertised on the website. If you try this product and don't agree with me, in the worst case you're out $32 for shipping. But, be prepared to keep the units because you may find your listening experience transformed. BTW, I'm not affiliated or associated in any way with Premium Audio or Class D Audio.

It's not just that they measured poorly, it's that they have load dependent frequency response, which is a problem most competent class d designers solved 20 years ago. Maybe your speakers have a flat impedance or maybe you just can't resolve it, but to me, it's like buying a brand new car advertised as state of the art and finding out it drum brakes all the way around and no abs.
 

AdamG247

Strive to be Understood, rather than heard!
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I thought I might weigh in on the Premium Audio mini Gan 5. After reading Daniboun's comments, and fully aware of Amir's really troubling measurements, I contacted Tom Rost at Class D Audio to discuss. Tom suggested that the unit Amir measured was "broken." Although I found Tom's other answers to my questions less than compelling, Class D Audio allows a 15-day trial period. So, for the total shipping cost of $32 I could try this "new" technology and decide for myself. I ordered a pair of mini Gan 5's ($1,400) to use as monoblocks. Tom indicates that as monoblocks they output 300 watts @ 8ohms and 400 watts @ 4ohms. To be truthful, I was expecting, yes the dreaded BIAS!!, the units to be less, far less in fact, than what they were advertised to be, i.e., class A quality (?), audiophile quality, SOTA, and so on. After several email inquiries/responses with Tom, I wanted to be generous but Amir’s measurements on ASR really troubled me. Nonetheless, I ordered a pair and several days ago I received a large box containing two small boxes each housing a diminutive, solidly built albeit sober 5 lb. amp. No audiophile jewelry here and, frankly, I’m grateful for that. Upon hook-up and initial turn on, only a barely, and I mean just barely, discernable hiss with my ear almost touching the tweeter cover of Spatial Audio Sapphire M3's. The internal blue led's indicated the amps were operating - SO FAR SO GOOD. I waited several hours and then couldn't help myself. Put on Ben Webster "Stormy Weather" and, and,................................., I was astonished. Ben's sax was utterly corporeal, burnished, with the most life-like tone color and dynamics I've heard. As Daniboun noted, the bass is also exemplary. I won’t claim that the M3's may as well be different speakers with these amps, but.... I hadn’t heard them sounding this musical before. Every aspect of sound reproduction is enhanced. The bass is substantially more alive - propulsive, dense tone, with excellent texture and pitch definition. String tone is sweet and superbly textured. Instrument placing across the soundstage is precise and well differentiated. Listening to the Baz Trio, an exceptional recording of a great piano trio, and, again, just sat transfixed. Piano tone is dense, rich, pure with superb dynamic scaling. Same with Charlap _ "Notes from New York." Bass is really noticeably more present. Listened to Lovano, Monk, Miles, Charlap, Evans, Pepper, Baker, etc. Brass, particularly on well recorded fare, is remarkably portrayed. Snare has greater snap and definition. The sound is utterly refined and by that I guess I mean no discernable noise, hash, grit, grain, glare, edge - nothing one would ordinarily associate with class D. This ain’t your father’s class D. All listenings were revelatory compared to previous listenings. The clarity, transparency, and resolution are among the best I’ve heard from any circuit topology. In fact, last night I got up around midnight just to come downstairs and listen. Haven't done that in probably 25 years. I've run the M3's with (a sampling but not all kit): tubes (Psvane 845, VTL 6550's), class D mosfet (Bel Canto eRef 600's), and class A sand amps (Pass, Sim Audio, Levinson) - all as monoblocks. Even so, these 5 lb. toys are not just competitive but, IMO, superior to all I’ve owned. And it's not like you have to ponder, stroke your beard and look to heaven for signs. Upon the first hearing it seemed rather obvious. Like Daniboun, I don't care to, and won't, get into the subjective/objective debate. Yes, ceteris paribus, I would prefer kit with superior objective measurements. But, as noted in the opinion piece (As We See It) in the Jan., 2019 issue of Stereophile (Vol.42, No.1), too many unanswered questions about measurements and their relationship/impact on audio quality and listening preferences. In truth, I just don't give a shit anymore. As I noted elsewhere in this forum, I want to be ravished by music and if it sounds good, I don't care if it's generated by mice spinning a wheel. These amps have transformed my system. I don’t mean to gush but when the listening experience is elevated in this fashion, I can't help myself. I’m just reporting what I’m hearing and maybe for the benefit of others. I understand the objectivists will howl and curse my name as they dance around a bonfire under the full moon. Don’t care. Think I'm full of shit? Maybe I am - but all you need to do is try gallium nitride GanFets.. As noted I went with Tom at Class D Audio and confirmed a trial period of 15 days as advertised on the website. If you try this product and don't agree with me, in the worst case you're out $32 for shipping. But, be prepared to keep the units because you may find your listening experience transformed. BTW, I'm not affiliated or associated in any way with Premium Audio or Class D Audio.
I am pretty certain that you are in the wrong Forum. This wall of subjective revelation text is not useful here and reads like an advertisement for the manufacturer. Hope you got a discount. Bye bye now.
 

tubess1988

Member
Joined
Jul 30, 2022
Messages
5
Likes
3
I thought I might weigh in on the Premium Audio mini Gan 5. After reading Daniboun's comments, and fully aware of Amir's really troubling measurements, I contacted Tom Rost at Class D Audio to discuss. Tom suggested that the unit Amir measured was "broken." Although I found Tom's other answers to my questions less than compelling, Class D Audio allows a 15-day trial period. So, for the total shipping cost of $32 I could try this "new" technology and decide for myself. I ordered a pair of mini Gan 5's ($1,400) to use as monoblocks. Tom indicates that as monoblocks they output 300 watts @ 8ohms and 400 watts @ 4ohms. To be truthful, I was expecting, yes the dreaded BIAS!!, the units to be less, far less in fact, than what they were advertised to be, i.e., class A quality (?), audiophile quality, SOTA, and so on. After several email inquiries/responses with Tom, I wanted to be generous but Amir’s measurements on ASR really troubled me. Nonetheless, I ordered a pair and several days ago I received a large box containing two small boxes each housing a diminutive, solidly built albeit sober 5 lb. amp. No audiophile jewelry here and, frankly, I’m grateful for that. Upon hook-up and initial turn on, only a barely, and I mean just barely, discernable hiss with my ear almost touching the tweeter cover of Spatial Audio Sapphire M3's. The internal blue led's indicated the amps were operating - SO FAR SO GOOD. I waited several hours and then couldn't help myself. Put on Ben Webster "Stormy Weather" and, and,................................., I was astonished. Ben's sax was utterly corporeal, burnished, with the most life-like tone color and dynamics I've heard. As Daniboun noted, the bass is also exemplary. I won’t claim that the M3's may as well be different speakers with these amps, but.... I hadn’t heard them sounding this musical before. Every aspect of sound reproduction is enhanced. The bass is substantially more alive - propulsive, dense tone, with excellent texture and pitch definition. String tone is sweet and superbly textured. Instrument placing across the soundstage is precise and well differentiated. Listening to the Baz Trio, an exceptional recording of a great piano trio, and, again, just sat transfixed. Piano tone is dense, rich, pure with superb dynamic scaling. Same with Charlap _ "Notes from New York." Bass is really noticeably more present. Listened to Lovano, Monk, Miles, Charlap, Evans, Pepper, Baker, etc. Brass, particularly on well recorded fare, is remarkably portrayed. Snare has greater snap and definition. The sound is utterly refined and by that I guess I mean no discernable noise, hash, grit, grain, glare, edge - nothing one would ordinarily associate with class D. This ain’t your father’s class D. All listenings were revelatory compared to previous listenings. The clarity, transparency, and resolution are among the best I’ve heard from any circuit topology. In fact, last night I got up around midnight just to come downstairs and listen. Haven't done that in probably 25 years. I've run the M3's with (a sampling but not all kit): tubes (Psvane 845, VTL 6550's), class D mosfet (Bel Canto eRef 600's), and class A sand amps (Pass, Sim Audio, Levinson) - all as monoblocks. Even so, these 5 lb. toys are not just competitive but, IMO, superior to all I’ve owned. And it's not like you have to ponder, stroke your beard and look to heaven for signs. Upon the first hearing it seemed rather obvious. Like Daniboun, I don't care to, and won't, get into the subjective/objective debate. Yes, ceteris paribus, I would prefer kit with superior objective measurements. But, as noted in the opinion piece (As We See It) in the Jan., 2019 issue of Stereophile (Vol.42, No.1), too many unanswered questions about measurements and their relationship/impact on audio quality and listening preferences. In truth, I just don't give a shit anymore. As I noted elsewhere in this forum, I want to be ravished by music and if it sounds good, I don't care if it's generated by mice spinning a wheel. These amps have transformed my system. I don’t mean to gush but when the listening experience is elevated in this fashion, I can't help myself. I’m just reporting what I’m hearing and maybe for the benefit of others. I understand the objectivists will howl and curse my name as they dance around a bonfire under the full moon. Don’t care. Think I'm full of shit? Maybe I am - but all you need to do is try gallium nitride GanFets.. As noted I went with Tom at Class D Audio and confirmed a trial period of 15 days as advertised on the website. If you try this product and don't agree with me, in the worst case you're out $32 for shipping. But, be prepared to keep the units because you may find your listening experience transformed. BTW, I'm not affiliated or associated in any way with Premium Audio or Class D Audio.
I have a set of Gan monos and I agree, I like mine so much that my old Tube and big SS amps have all been retired. Enjoy! Cheers.
 
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