Sabaj A30a announced

[Roland68]

Exactly, your main speakers' woofers won't produce anything lower than 70 Hz.
It's perfectly fine for bookshelf speakers (I set a cutoff of either 70 or 80 Hz for my Elac Vela BS 403), it may be too high for floorstanding ones (for my Elac Carina FS 247.4 the ideal cutoff is around 45 Hz, in this case I can only get it through the Wiim Ultra, not directely from the Sabaj A30a).

"Anything" is maybe too strong word here. 70Hz is "cut-off" point, which is actually only -3db from nominal. It rolls of from there (either 12db octave or 24db octave). For example I have Naim Unitiqute, which has similar built-in high-pass filter at 100Hz ! And there is still noticeable signal at 60...70Hz then. So I would only assume your towers would produce output at ~50Hz with 70Hz crossover. Rolloff.

I use the Heco Aurora 700 floor-standing speakers on an A30a, which have an amazingly deep bass.
In the evenings and when I'm listening to loud music (or TV), I use the SUB 70Hz function to reduce the lower bass range. This works so well that I sometimes forget to turn the SUB CUT OFF off again. All other settings are set to neutral or OFF. With SUB 70Hz, the bass level of, for example, the Elac DBR62 is still achieved and slightly exceeded.

When a friend came to visit me and Katy Perry MTV Unplugged was playing, he said that it had a lot of bass. Then I turned the SUB 70Hz off.
I deeply regret not having had a camera to hand to document his stunned face. I've only seen him so speechless once or twice.

 

[KL....]

This area is for internal processing/filtering/adjustment only. It has absolutely nothing to do with what we commonly refer to as "DSP" here.
If you look closely, the Axign AX5689 is of course an extremely specialized DSP chip with a PWM output, 8 ADCs, digital input and digital output.

The menu reproduces 1:1 the tables from the data sheet for all sound settings and sub. This is more than just a coincidence.

You noticed it and changed something in your text.
However, it seems that Sabaj and SMSL also did not understand the concept of the Axign AX5689.
The Axign AX5689 is a closed system that only has 4 relevant transfer points. Digital input, digital output, PWM output and ADC input.
The use of a DSP in front of the AX5689 was specifically planned by Axign and thought through to the end. 2-4 of the ADCs can be used to feed in analog signals and output them digitally to the external DSP, so that externally supplied analog signals can be processed in exactly the same way as digital ones.
Axign did a really great job and if Sabaj and SMSL had understood the concept behind it, then there wouldn't be a mediocre PCM1804 implanted in the two devices.

And just as a note, how should the AX5689 know or notice that a DSP chip is working in front of it?
How was this chip supposed to recognize whether the digital audio data of the piece of music came directly from the studio or was changed with a DSP?

Hi, I purchased one, just received it, like it (muchly, even with initial playtime, using SPDIF/Coax, SUB off), and I will give my impressions after (much) more playtime :=)

Re Axign AX5689 - 2-4 of the ADCs can be used to feed in analog signals and output them digitally to the external DSP, so that externally supplied analog signals can be processed in exactly the same way as digital ones.... have you gleaned, or do you know, what digital format is outputed from the Axign AX5689/2-4 of the ADCs and will the A30a ASRC or DSP/STA309A recognise this digital format/output?

It would nice if the A30a accepted (perhaps, 1pr/XLR and 3 or 4pr/RCA) of selectable analogue inputs.

 

[Roland68]

Hi, I purchased one, just received it, like it (muchly, even with initial playtime, using SPDIF/Coax, SUB off), and I will give my impressions after (much) more playtime :=)

Re Axign AX5689 - 2-4 of the ADCs can be used to feed in analog signals and output them digitally to the external DSP, so that externally supplied analog signals can be processed in exactly the same way as digital ones.... have you gleaned, or do you know, what digital format is outputed from the Axign AX5689/2-4 of the ADCs and will the A30a ASRC or DSP/STA309A recognise this digital format/output?

It would nice if the A30a accepted (perhaps, 1pr/XLR and 3 or 4pr/RCA) of selectable analogue inputs.

Please not again .

1. Get the data sheets and development documents from MSP for the Axign AX5689.

2. Please read my two posts #1.513 and #1.514 again carefully and understand what they say. It's best to read the previous posts as well.

3. You can't do anything useful with the built-in ST DSP chip (or the others) in the A30a anyway, so any connection to the ADC of the Axign AX5689 is nonsense. If you had looked into the function and possibilities of the STA309A, you would know that.

4. Without first hacking the software of the A30a or finding another way to control the Axign AX5689 via software, everything else is just a waste of time.

5. The A30a can easily be expanded using external switch boxes, ADCs and DSPs with analog inputs (also digital), including balanced/unbalanced connections.

And again, very explicitly: if you have the skills to carry out such a conversion, then it would be much easier to design a new circuit board. It would also only take a fraction of the time and would make much more sense.

By the way, congratulations on your new device and have fun with it.

 

[KL....]

Thank you, I think that I have all the answers I require, for now. It will be intrigueing to see what the next Sabaj Integrated (PWM) Amplifyer will be. The Axign AX5689, and the Sabaj implementation around it, is certainly very good and nice to see. It could be suggested that Sabaj already have considerable software/firmware and implementation skills, perhaps they have been closely watching this thread, and already have ideas/plans for a next/future design/implementation :=)

I will be compareing the Sabaj A30a (settings set to 0 or Off, SPDIF/Coax Jitter set to 2 (no issues) which I found better sounding than 3 but I might try 1) to a Pathos Classic One/II Integrated Amplifyer which in factory form I didn't like (especially the light/muddy Bass), so I did some simple changes/mods to it which I found much more to my likeing (especially the resulting fuller/tighter Bass although more would be nice). The Pathos is still not there/right as yet, for my likeing, but (much) closer. Sometimes I wonder if these changes/mods are measurable and if they are what would they show. Perhaps that is another story because, at this stage, the Sabaj A30a is at least as good, much less cost, no costly NOS valves required, directly accepts digital signal without a DAC requirement, accepts analogue/RCA, warm to touch (not hot), good/sufficient power output, and there is no noise coming from the 92db/SPL speakers (not even the slight hiss/noise, very quiet), which is very nice to see and experience, at an affordable price. Let's see if these units have a long (ish) life span....

As mentioned, I will give my impressions after (much) more playtime :=)

 

[Roland68]

Thank you, I think that I have all the answers I require, for now. It will be intrigueing to see what the next Sabaj Integrated (PWM) Amplifyer will be. The Axign AX5689, and the Sabaj implementation around it, is certainly very good and nice to see. It could be suggested that Sabaj already have considerable software/firmware and implementation skills, perhaps they have been closely watching this thread, and already have ideas/plans for a next/future design/implementation :=)

You are probably very far off the mark on this point and I wouldn't bet a cent that they will bring out a successor to the A30a, apart from the fact that the A30a is just the cheap Sabaj offshoot of the SMSL VMV A2.

We don't even need to talk about software and firmware, it's no secret that this is not one of their core competencies, to put it nicely .
SMSL (and also Loxjie and Sabaj) are the manufacturers who often only stick to circuits from the data sheets/white papers and then optimize them for testing. I have rarely seen independent solutions and innovations.
In that respect, the A30a and A2 are the highlights of their range for me, but they could also have come from an external developer, which is not unusual.
Topping has often attracted attention with independent solutions and innovative solutions.

And this is exactly where I see the general problem with this company. VMV A2 and A30a were not developed with what was technically feasible and possible, but only with the options that were available at this company. And that is a very big difference. However, the price is also moderate.
But that is a long way from what would be possible with the Axign AX5689.

But nevertheless, for me the A30a remains one of the best amplifiers on the market, not just for the price.

 

[KL....]

Yes, the Axign AX5689 can certainly be utilised further (fortunately, it is in its 6/7 iteration, isn't it?) which is a reason that I asked some questions (of the experts), especially as I enjoy discussing topologys and implementations.

Btw, my CDP/DAC/Pre unit is currently being repaired (unfortunately) so currently using SPDIF/Coax from a Laser brand DVD unit ($30 unit I brought 6-7yrs ago for a family member but was not used by them nor used during that time, so it is (also) literally new). As mentioned, the SPDIF/Coax Jitter is set to 2 (no noticed locking issues) which I found better sounding than 3 but I might/will try 1. If a setting of 1 performs w/o locking issues then I will leave it at the 1 setting. So, my current listening is with an old $30 Laser brand/DVD unit, connected via SPDIF/Coax (performing very well, as mentioned, and the A30a and Laser DVD are both, new). My logic is suggesting that the analogue out will not perform well, because it will be using the DAC in the Laser brand/DVD unit, but I will try it anyway (even if just for a giggle), to at least test the A30a analogue section and to give the analogue section (required) playtime. It could be suggested that new units require (musical) playtime (w/o abuse, just like an engine/valves/components/circuits/etc) to reach a stable (conditioned/runin/burnin) bias condition.

As mentioned, I will give my impressions (compared to the Pathos Classic One/II Integrated Amplifyer/lightly modded) after (much) more playtime. Perhaps by then I will have the CDP/DAC/Pre unit back/repaired :=)

 

[voodooless]

It could be suggested that new units require (musical) playtime (w/o abuse, just like an engine/valves/components/circuits/etc) to reach a stable (conditioned/runin/burnin) bias condition.

I could suggest that it is nonsense…

 

[KL....]

I could suggest that it is nonsense…

A suggestion of conjecture without substance (at this point, just Babyl/Conjecture/one liner) but perhaps you (both) can scientifically substantiate your nonsense, it is up to you. Nothing or no one likes to be abused or stressed, do they....

 

[antcollinet]

A suggestion of conjecture without substance (at this point, just Babyl) but perhaps you (both) can scientifically substantiate your nonsense, it is up to you. Nothing or no one likes to be abused or stressed, do they....

There are no characteristics of solid state electronics that vary over a period of hours or days, that can make any audible difference at all. Let alone changes that are going to introduce some audible benefit.

Unlike motor engines, where initial mechanical wear of newly machined components is a well understood and documented phenomenon. And indeed, the manufacturing tolerances are set to account for this wear.

When people hear a change over time, all they are hearing is their auditory system (the brain part of it) becoming used to listening routinely to the sound instead of "listening for differences", or similar psychoacoustic changes. In other words, it is them/the auditory parts of the brain that is burning in, they are not hearing changes to the electronics.

If you think otherwise, please point to the information in electronic component data sheets (or other component manufacturer documentation) to support your assertion. And remember - audio electronic components are engineered: There are no mysterious processes at play. No magic.

 

[voodooless]

A suggestion of conjecture without substance (at this point, just Babyl)

Yeah, right back at ya

but perhaps you (both) can scientifically substantiate your nonsense, it is up to you.

While some electronics do need a short startup time to become stable (notably some amps), this is a process that takes seconds up to minutes at best. Certainly not hours, days, or weeks.

Burn-in as you describe it simply isn't a thing. There is zero scientific evidence that would support this. There are plenty of topics on this:

Audiolab 6000CDT, bright sounding, burn in time?

I have recently decided to buy a new Audiolab 6000CDT based on all the rave review online & YouTube. Connected it up & disappointed with its bright, slightly artificial, very digital sound signature so I left on playing repeat for over a week to burn in. Still, not much more improvement so my...

www.audiosciencereview.com

Burn-in testing - real or imaginary?

Has there been any testing here to confirm if it takes 100s of hours of burn-in before an audio component "sounds" its best? I'm a bit skeptical, especially for solid-state devices, but prove me wrong with data.

www.audiosciencereview.com

DAC burn-in/break-in? My Gustard X16 measurements

This is a post copied from my other thread at https://www.audiosciencereview.com/forum/index.php?threads/phase-shift-and-echo-trails-length-illusion.20618/post-684254. When I first got my X16 into my stereo setup, my first impression was E30 have better highs. Because I did voltages...

www.audiosciencereview.com

Equipment burn-in: am I deluded?

Hi all, I recently received a Topping D3 DAC/amp. At first it seemed quite tilted up in the high frequencies and lacking in deep bass. After a few days, though, that seems resolved. Did I acclimate to the Topping, or did it change in sound? I’ve never believed in burn-in, aside from perhaps...

www.audiosciencereview.com

Danny Richie Audio Myths on “Electrical Burn In”

I was going to post this video in “Speakers, Headphones, & Room Acoustics” but he goes into other audio myths midway through and towards the end of the video. A “flat earther” that calls others “flat earthers.”

www.audiosciencereview.com

Nothing or no one likes to be abused or stressed, do they....

Sorry to say this, but if you think these phenomena are real, you've been abused and indoctrinated by the industry.

 

[KL....]

You are probably very far off the mark on this point and I wouldn't bet a cent that they will bring out a successor to the A30a, apart from the fact that the A30a is just the cheap Sabaj offshoot of the SMSL VMV A2.

We don't even need to talk about software and firmware, it's no secret that this is not one of their core competencies, to put it nicely .
SMSL (and also Loxjie and Sabaj) are the manufacturers who often only stick to circuits from the data sheets/white papers and then optimize them for testing. I have rarely seen independent solutions and innovations.
In that respect, the A30a and A2 are the highlights of their range for me, but they could also have come from an external developer, which is not unusual.
Topping has often attracted attention with independent solutions and innovative solutions.

And this is exactly where I see the general problem with this company. VMV A2 and A30a were not developed with what was technically feasible and possible, but only with the options that were available at this company. And that is a very big difference. However, the price is also moderate.
But that is a long way from what would be possible with the Axign AX5689.

But nevertheless, for me the A30a remains one of the best amplifiers on the market, not just for the price.

Thank you, it would appear that you have compared the A30a to many other units or combination of units. Would you mind writing about a few of the units or combination of units that you have compared it to and why you like the A30a more or not more? If not comparison to other units or combination of units what would you suggest (perhaps measurements or comparison or both or other) provides you with the decision/conclusion that the A30a remains one of the best amplifiers on the market, not just for the price.

 

[KL....]

Yeah, right back at ya

While some electronics do need a short startup time to become stable (notably some amps), this is a process that takes seconds up to minutes at best. Certainly not hours, days, or weeks.

Burn-in as you describe it simply isn't a thing. There is zero scientific evidence that would support this. There are plenty of topics on this:

Audiolab 6000CDT, bright sounding, burn in time?

I have recently decided to buy a new Audiolab 6000CDT based on all the rave review online & YouTube. Connected it up & disappointed with its bright, slightly artificial, very digital sound signature so I left on playing repeat for over a week to burn in. Still, not much more improvement so my...

www.audiosciencereview.com

Burn-in testing - real or imaginary?

Has there been any testing here to confirm if it takes 100s of hours of burn-in before an audio component "sounds" its best? I'm a bit skeptical, especially for solid-state devices, but prove me wrong with data.

www.audiosciencereview.com

DAC burn-in/break-in? My Gustard X16 measurements

This is a post copied from my other thread at https://www.audiosciencereview.com/forum/index.php?threads/phase-shift-and-echo-trails-length-illusion.20618/post-684254. When I first got my X16 into my stereo setup, my first impression was E30 have better highs. Because I did voltages...

www.audiosciencereview.com

Equipment burn-in: am I deluded?

Hi all, I recently received a Topping D3 DAC/amp. At first it seemed quite tilted up in the high frequencies and lacking in deep bass. After a few days, though, that seems resolved. Did I acclimate to the Topping, or did it change in sound? I’ve never believed in burn-in, aside from perhaps...

www.audiosciencereview.com

Danny Richie Audio Myths on “Electrical Burn In”

I was going to post this video in “Speakers, Headphones, & Room Acoustics” but he goes into other audio myths midway through and towards the end of the video. A “flat earther” that calls others “flat earthers.”

www.audiosciencereview.com

Sorry to say this, but if you think these phenomena are real, you've been abused and indoctrinated by the industry.

Thank you, these would appear to be your focus, it will take some time to read through them to assess the focus/point of view. It will also allow others to have a read of them.

Yes, there are a lot of secret sauces out there, mostly in an endeavour to protect their IP from being copyed and used competitively against them which (perhaps/hopefully) will allow future R&D to continue. Although sometimes only to protect their market position which us not helpful. In these many, many, many cases/situations, it could be suggested, that you will not be informed correctly, (less than the Truth, sometimes alot less or even no Truth) of anything that could deter any from purchasing their products or (easyly) allow copying of their products (which is reasonable if it is helpful but not if it hinders). Unfortunately, as a result, Dogma (such as marketing/etc Dogma) can result/occur and the real Truth may not/never be known/revealed and Babyl/Conjecture/Propaganda persists/rises (usually for a long time). Babyl/Conjecture/Propaganda is very corrupting/deceiving, as such we need to always assess everything (as best we can), best done with an open mind (perhaps Schrodinger's Cat Observation is a reasonable example of an open mind).

Yes, nothing or no one likes to be abused or stressed, but it could be suggested, do not mind being utilised with respect.

 

[Roland68]

Thank you, it would appear that you have compared the A30a to many other units or combination of units. Would you mind writing about a few of the units or combination of units that you have compared it to and why you like the A30a more or not more? If not comparison to other units or combination of units what would you suggest (perhaps measurements or comparison or both or other) provides you with the decision/conclusion that the A30a remains one of the best amplifiers on the market, not just for the price.

This is my personal opinion and experience about and with the A30a, which no one has to share.
The A30a has no analog circuits in the digital path up to the output of the power transistors, where the signal is output in analog via PWM.
This completely eliminates a lot of influences in the analog area, potentiometers, active and passive components such as OP amps, transistors, resistors, etc., relays, conductor tracks, etc.

In addition, there is a compact design, the housing is like a small tank, low heat generation, high performance, continuous load resistance (extensively tested) and no audible problems with impedance-critical loudspeakers.
The digital inputs also allow a DSP/FIR convolver/PC with EQ to be connected upstream, so that a completely digital path is maintained here too, without having to convert to analog and back again.

Did I already say that no DAC is needed with the A30a ?
This also makes many considerations and discussions obsolete.

As far as the comparisons are concerned, I can only say this much: the A30a delivers a level of transparency, cleanliness and bass control that I have only found in a few amplifiers, and then in much higher price ranges. Some users in this thread and friends of mine have also had this experience.
But everyone should have their own experiences.

 

[KL....]

This is my personal opinion and experience about and with the A30a, which no one has to share.
The A30a has no analog circuits in the digital path up to the output of the power transistors, where the signal is output in analog via PWM.
This completely eliminates a lot of influences in the analog area, potentiometers, active and passive components such as OP amps, transistors, resistors, etc., relays, conductor tracks, etc.

In addition, there is a compact design, the housing is like a small tank, low heat generation, high performance, continuous load resistance (extensively tested) and no audible problems with impedance-critical loudspeakers.
The digital inputs also allow a DSP/FIR convolver/PC with EQ to be connected upstream, so that a completely digital path is maintained here too, without having to convert to analog and back again.

Did I already say that no DAC is needed with the A30a ?
This also makes many considerations and discussions obsolete.

As far as the comparisons are concerned, I can only say this much: the A30a delivers a level of transparency, cleanliness and bass control that I have only found in a few amplifiers, and then in much higher price ranges. Some users in this thread and friends of mine have also had this experience.
But everyone should have their own experiences.Where

Thank you for your thoughts and impressions :=)
Yes, the chassis/housing is like a small tank, especially when I compare to the Laser brand DVD unit which feels like a biscuit tin.
Yes, to everything you have indicated....

• compact design, the housing is like a small tank, low heat generation, high performance, continuous load resistance (extensively tested) and no audible problems with impedance-critical loudspeakers. The digital inputs also allow a DSP/FIR convolver/PC with EQ to be connected upstream, so that a completely digital path is maintained here too, without having to convert to analog and back again. Did I already say that no DAC is needed with the A30a? This also makes many considerations and discussions obsolete.

Yes, the A30a....

• delivers a level of transparency, cleanlyness, and bass control that I have only found in a few amplifiers, and then in much higher price ranges
• An aspect that has really, really surprised me is that I am experiencing this with a $30 Laser brand DVD unit via SPDIF/Coax, as Source.... truly fabulous and completely unexpected.

The following could be due to the Laser brand DVD unit but initial observations have been....

• a little unresolved congestion in the 750/900~1200/1500hz area but with playtime that is becoming less and less and virtually now resolved/nonexistent (nolonger an issue). This is particularly noticeable with Choral, Orchestral, even mass Clapping. The leading edge attack (stop/stop with continueing decay) has also improved and continueing to improve.
• slightly light Bass but the weight/character is also improving with playtime. Better than the Pathos Classic One/II Integrated Amplifyer (even lightly modded)
• the mids could have slightly more weight/character (some use the term Fuller) but that also is improving with playtime.
• I tried the SPDIF/Coax Jitter is set to 1 but noticed (occasional) locking issues, so back to 2 and will try 1 again after more playtime.
• Note that the A30a SMPS is a MORNSUN LOF350-20B48 but perhaps we need to be aware of Where'd Mornsun go?. To ask, would a MORNSUN LOF450-20B48 or LOF550-20B48 be even better in the A30a, especially as they are the same size/dimensions?

It would nice if the A30a accepted (perhaps, 1pr/XLR and 3 or 4pr/RCA) of selectable analogue inputs, like the Pathos Classic One/II or III Integrated Amplifyer.

So and Btw, I purchased another one, why!.... because I am enjoying it very much, even with the $30 Laser brand DVD unit as Source, via SPDIF.... fabulous :=)

 

[Roland68]

• Note that the A30a SMPS is a MORNSUN LOF350-20B48 but perhaps we need to be aware of Where'd Mornsun go?. To ask, would a MORNSUN LOF450-20B48 or LOF550-20B48 be even better in the A30a, especially as they are the same size/dimensions?

It would nice if the A30a accepted (perhaps, 1pr/XLR and 3 or 4pr/RCA) of selectable analogue inputs, like the Pathos Classic One/II or III Integrated Amplifyer.

So and Btw, I purchased another one, why!.... because I am enjoying it very much, even with the $30 Laser brand DVD unit as Source, via SPDIF.... fabulous :=)

The larger power supplies are of no use as long as there is no power limitation. And I couldn't notice anything like that even at high volumes, with bass-heavy music and inefficient speakers.
If so, then it would make sense to try Mean Well HRP N3 power supplies, as they are much better suited for this due to their ability to deliver up to 350% more power in the short term (up to 5 seconds).

The housing would be much too small for additional connections.
I use an external box, e.g. AUDIOPHONICS RCA Input Selector 4 to 1, but there are more options.
With your DIY skills, you can also build a box to match the A30a that does everything.
- XLR and RCA inputs
- Balanced board -> RCA
- Phono board, if desired
- 1 or 2 EIZZ EZ-4003-800 switches
- RCA analog output -> A30a analog input
= Any number of analog RCA and balanced inputs

Or
- XLR and RCA inputs
- RCA board -> Balanced
- Phono board, if desired
- 1 or 2 EIZZ EZ-4003-800 switches
- Cosmos ADC with XLR input and SPDIF output
- SPDIF switch
- Digital output -> A30a digital input
= Any number of digital, analog RCA and balanced inputs
With relay or reed relay switches you could even control the whole thing remotely.
The possibilities are only limited by your imagination.

I originally bought one to play around with it and try out a few things. The big Yamaha amp was actually on the agenda last year.
I now have one in my system and one at my workplace.

 

[voodooless]

The following could be due to the Laser brand DVD unit but initial observations have been....

• a little unresolved congestion in the 750/900~1200/1500hz area but with playtime that is becoming less and less and virtually now resolved/nonexistent (nolonger an issue). This is particularly noticeable with Choral, Orchestral, even mass Clapping. The leading edge attack (stop/stop with continueing decay) has also improved and continueing to improve.
• slightly light Bass but the weight/character is also improving with playtime. Better than the Pathos Classic One/II Integrated Amplifyer (even lightly modded)
• the mids could have slightly more weight/character (some use the term Fuller) but that also is improving with playtime.

 

[KL....]

The larger power supplies are of no use as long as there is no power limitation. And I couldn't notice anything like that even at high volumes, with bass-heavy music and inefficient speakers.
If so, then it would make sense to try Mean Well HRP N3 power supplies, as they are much better suited for this due to their ability to deliver up to 350% more power in the short term (up to 5 seconds).

The housing would be much too small for additional connections.
I use an external box, e.g. AUDIOPHONICS RCA Input Selector 4 to 1, but there are more options.
With your DIY skills, you can also build a box to match the A30a that does everything.
- XLR and RCA inputs
- Balanced board -> RCA
- Phono board, if desired
- 1 or 2 EIZZ EZ-4003-800 switches
- RCA analog output -> A30a analog input
= Any number of analog RCA and balanced inputs

Or
- XLR and RCA inputs
- RCA board -> Balanced
- Phono board, if desired
- 1 or 2 EIZZ EZ-4003-800 switches
- Cosmos ADC with XLR input and SPDIF output
- SPDIF switch
- Digital output -> A30a digital input
= Any number of digital, analog RCA and balanced inputs
With relay or reed relay switches you could even control the whole thing remotely.
The possibilities are only limited by your imagination.

I originally bought one to play around with it and try out a few things. The big Yamaha amp was actually on the agenda last year.
I now have one in my system and one at my workplace.

Thank you for the update and options. Nice to know that the Mean Well HRP N3 SMPS is a good option. I will look into the mentioned external box options :=)

I have an impressions update of the A30a....

• the unresolved congestion in the 750/900~1200/1500hz area is now nearly resolved. Just a little hardness in the 900~1200hz area. I would suggest unresolved harmonics, a bell like beamyness, some call it shoutyness . This is particularly noticeable on a womans voice (especially at little higher volume level) when they crescendo/rise sharply in pitch or are straining to reach the higher pitch. With more playtime let’s see if that becomes more resolved/nonexistent (nolonger an issue).
• the Bass is now displaying more weight/impact/character, much tighter with fullness.... very nicely resolved
• the Mids are now displaying more weight/character (some use the term Fullness)…. very nicely resolved
• overall, the A30a, even with being fed with a $30 Laser brand DVD unit as Source via SPDIF, is now better than the Pathos Classic One/II Integrated Amplifyer (even lightly modded) being fed with an Audiolab 8200CDQ CDP/Pre.
• I always need to remind myself that the source is a $30 Laser brand DVD unit, using SPDIF output. I can say the result was completely unsuspected but I am very much enjoying the unsuspected surprise/result. I wonder how the A30a will perform when the repaired Audiolab 8200CDQ CDP/Pre is fixed and returns for me to utilise.
• The odd thing is that the $30 Laser brand DVD unit is reading the discs better than the Audiolab 8200CDQ CDP. I am a little surprised by this. Do you have any ideas, why?

Thank you, I am enjoying the A30a very muchly, now even more, enjoy….

 

[KL....]

Thank you, I will add this link to list, for myself and others to read.

To ask, what is your intent of the link/article that you have posted because we really need to know your focus and be able to assess it from your focus/point of view, especially as you posted the link (with reply/in part) without being concise, by providing context, nor precise. Although you did post the link example, without your concise context, what are you being precise about?

Is your post about the A30a which is the title of the thread? It could be suggested that the thread would like such posts as measured specifications, impressions, observations, I purchased one, etc? If no, re measured specifications, it has been often suggested that they are the same as the SMSL VMV A2, but as has also been mentioned, the CB is a different layout, the chassis/housing are different, there are possibly other differences, and the implementation, more than the Chip, is paramount.

To be helpful, we really need to know your focus and be able to assess it from your focus/point of view otherwise it is a suggestion of conjecture without substance. At this point, just Babyl/Conjecture with no conciseness/context from your focus/point of view but perhaps you (both) can, from your focus/point of view, scientifically substantiate the link (to a 3rd party), to be concise and precise, to be (hopefully) helpful, which is up to you. Intent/Context is always very important, isn’t it?

To ask, have you purchased an A30a? If yes, what are your impressions/observations of it in your audio system? If no, then it needs to asked, ‘would you prefer others to not purchase the A30a?’

 

[KL....]

I originally bought one to play around with it and try out a few things. The big Yamaha amp was actually on the agenda last year.
I now have one in my system and one at my workplace.

Forgot to ask, have you played around with the A30a and tryed out a few things? If yes and you do not mind my asking, what did you workout and decide to do?

Also which big Yamaha amp were you considering?

 

[Roland68]

If no, re measured specifications, it has been often suggested that they are the same as the SMSL VMV A2, but as has also been mentioned, the CB is a different layout, the chassis/housing are different, there are possibly other differences, and the implementation, more than the Chip, is paramount.

According to current knowledge, there are no differences in the digital area and amplifier circuit between the SMSL VMV A2 and Sabaj A30a.
The power supply is definitely the same, as are all the ICs and output transistors used.
As I now know that the entire installation in the A2 is upside down, we can also assume that the same layout was used. Perhaps with slight spatial adjustments and apart from the different connections for digital inputs and SUB output, which only affects the direct conductor tracks to the ICs.
So the entire implementation will also be the same.