What are the best GaN Amplifiers available today?

I trust you for sure...And the ears of your friends...

You are right there is no simple absolute solution wrapped in one box...

I will go the road of opting out of the grid.... 😊

the cheapest upgrade is this 700 bucks gisandel...

my audio system is so perfect now for my ears i sense the only big elephant is the noise floor...

Going from the house i sold to the other i bought was illuminating ... It was an improvement...

but i must go off the grid....Your solution is the cheapest i had seen...

By the way look the battery i discovered... A deal i think 500 canadian dollars ...

https://www.amazon.ca/dp/B0BX8S2VJ5/?coliid=IKXADUV0BL4GC&colid=1BP2ARF9W3KAX&ref_=list_c_wl_lv_ov_lig_dp_it&th=1

I own a Sansui alpha 607i i think the consumption is 380 watts 460 VA rated 720 watts maxinmum ...

What do you think ? I use a small battery dac .... I like it... Then only my amplifier will be on the Gisandel+ battery...

On your site you suggested a more powerful inverter 5,000 watts  than the one you suggested here, 2000 watts,  my question is : with my amplifier Sansui would i have enought hours of music  between battery charge ?

The 5000 watt Giandel Inverter ($900) does its job well fed by LifePo4 batteries.  If you are using digital amps then one $800 battery will give you sound for 8 hours straight without charging .

I am not an electrical engineer , i apologize for the simplistic question ...😊

I understand.... but did you use it yourself?

I recommend that particular 2000 watt Giandel inverter because it is FCC approved so may have lower noise.

It seems a problem to buy one with a low noise floor...

using an inverter in audio ask for a really low noise floor if not where is the advantage ?

Did you have one inverter in your own audio system ?

I decided to go this road instead of upgrading my Sansui alpha amplifier...

now it seems not a so evident solution...😁

I had no idea about an inverter dedicated for audio use...

@mahgister this is the inverter Ric was referencing Amazon is $20 more than buying from Giandel directly.

I am not sure the inverter recommended by ricevs has a low noise floor and  is good for an audio system...

https://www.amazon.com/GIANDEL-Inverter-Outlets-Controller-Emergency/dp/B092QS7NWJ/ref=asc_df_B092QS7NWJ?tag=bingshoppinga-20&amp=undefined&linkCode=df0&hvadid=79920877695300&hvnetw=o&hvqmt=e&hvbmt=be&hvdev=m&hvlocint=&hvlocphy=&hvtargid=pla-4583520399131091&th=1

One reviewer say this :

Reviewed in the United States on May 14, 2023

Thanks very much...

Very useful....

i did not have the right one i take note of the right one...

Did you use them in your audio system ?

@mahgister  this is the inverter Ric was referencing Amazon is $20 more than buying from Giandel directly.

https://www.amazon.com/GIANDEL-Inverter-Outlets-Controller-Emergency/dp/B092QS7NWJ/ref=asc_df_B092QS7NWJ?tag=bingshoppinga-20&linkCode=df0&hvadid=79920877695300&hvnetw=o&hvqmt=e&hvbmt=be&hvdev=m&hvlocint=&hvlocphy=&hvtargid=pla-4583520399131091&psc=1

https://www.giandel.com/collections/for-usa/products/usa-ca-ps-2000sar-12v?spm=..collection_1420e790-75ee-4215-9a9b-b1784d20dde5.collection_1.27&spm_prev=..index.header_1.1

 

The Giandel PS2000SAR...2000 watt pure sine wave inverter is on sale right now for $289 delivered. 

is it the one you mentionned ?

https://www.amazon.ca/GIANDEL-2200-12-120-port/dp/B07CKBJ9KP?ref_=ast_sto_dp&th=1&language=en_CA

If i pick this one do i need 12 volt or 24 volt for my Sansui 607i alpha  amplifier ?

is this battery will do the job ?

https://www.amazon.ca/dp/B08LD7PP8N/?coliid=I3A2B81EMULYS8&colid=1BP2ARF9W3KAX&ref_=list_c_wl_lv_ov_lig_dp_it&th=1

Can i use it without battery directly from the wall connected to my amplifier ?

Will i see an improvement even without the battery ?

Can i bought the battery later or it is necessary to go with the battery too ?

The Giandel PS2000SAR...2000 watt pure sine wave inverter is on sale right now for $289 delivered.  Buy a $300 100 amp hour LifePo 4 battery and a 20 amp charger and for around $700 total....you will be mind blown. 

For design and for synergy measures are fundamental...

Psycho-acoustic is based on measures not only electronical but physiological etc...

To tune a room and to refine a system we need to learn how to listen...

Our ears are also a tool...

Dr. Choueri will approve Atmasphere observation for sure...😊

For me the advise of two experts is enough...

The problem we have now is almost as bad: most people including those that make the measurements, fail to understand their significance WRT how the ear/brain system perceives sound.

Neutral is good for details and realism...

My Sansui Au 7700 so good it was , sounded less neutral than my Sansui alpha , it was not so less sensible in my speakers/room , but with headphone i even change my french TDA 1543 Dac NOS which was more than good , for a more neutral Hidizs dac and the Sansui more neutral amplifier , because my headphone asked for  the highest possible cleanliness and neutrality... They are way more refined than my speakers were so good they were in my room ..

Then ideally we need neutrality as an end goal...

Great post! thanks...

The two are interesting and competent...

But between people sometimes discssion may be "heated" a bit...

Anyway  these two makes great contributions very few of us can match...

i respect the two person in the utmost possible way...

Mr Ralph is a good engineer and I often find his posts interesting and useful. A very effective marketing tool as well.

Mr Charles Hanson, another good engineer, before he passed (RIP), stated on one of these forums that Mr Ric is one of the most knowledgeable digital engineers in the county.

So just because Mr Ric is primarily a mod guy with an unconventional personality, don't discount what he has to say. He certainly has better ears than most of us. I've used him several times over the last decade or so. He's a straight shooter and an honest guy. He stands behind his work. I've always been pleased with the results. Very reasonably priced, I might add. He's also interesting in other regards.

In a word:

The designer in his plea is right...

The tweaker in his plea is right too...

 In a general way...

All the rest is case by case specific undesirable or desirable modifications...

A new design must be made with a complete set of measures in mind...This set of measures are trade-off choices...

No design is perfect...

But designer dont tweak by definition...If they do they must integrated their tweak in the design... With or without set of measures but more often then not designer are engineer and physicist in some case  as for my headphone, they dont tweak, they use well known scientific principle and they apply it ...

But this headphone for example so innovating and amazing it was designed needed some modifications FOR ME : I throw off the protective plastic thick grid, i changed the volume of the shell chamber by using other pads than the original one, I put inside it two products to damp its vibration... After that and some other rectification their design was IMPROVED for my ears...So much so that upgrading it appear preposterous to me...

I respect a lot Dr. Gorike the physicist who design this marvel... But any design can be improved... But i will  not play with amplifier electronics components by lack of competence and it seems to me less necessary  But i even tweak my Sansui Alpha for the better with various minerals OUTSIDE of his body 😊... No serious designer will do that or advise such a "ridiculous thing" ...

Designing is a serious enterprise with his own ethic and secrets...

Tweaking a component if the user like to experiment is always possible...

Anyway any system must be embedded mechanically , electrically and acoustically ... These controls can be methodically applied or applied discretely and called "a tweak"...

I already own a Sansui alpha...

It work well out of the box and is not a bad S.S. design at all...

But i "helped it" not because it need it... But because my ears are not yours...And i like experimenting and i could do it anyway...

Our hearing work non linearly , this means that a little well chosen specific  level of " noise" can increase the signals/ noise ratio for MY EARS ... Differently for yours... It is called tweaking for this reason...

Also some design dont need this helping hand, because the amplifier will be immersed in a specific mechanical,electrical and acoustic environment which can be already optimal without need for "help" and each one of our ears structure and internal filters and biases are different...

Audio is the art of trade-off ... There is NO PERFECT DESIGN...There is no perfect environment for all and every component... For example some speakers need some type of room , some amplifier work better with some speakers or dac etc ...

😁

Just buy a certified good quality amp to start with and no need to tweak.

Proposing a "tweak" is not the same as designing an amplifier..

For example i had a better experiment to propose about for sure what cannot be measured BUT could be heard :

Put a 250 gram of quartz on your amplifier...

Put a 250 gram of shungite on your amplifier...

Put the two together now...

You will hear a difference...

I fine tune my S. S. amplifier with these minerals tweaks... Really for the best...

But tweaking is not designing... No more than walking with better crutches are like installing an up to date prosthetic legs or growing a new one ..

And an improvement by design is always better than tweaking a design... So good the tweaks will be ... And they will if you know what you do with your ears...😊

But all of what we can learn from a component  and hearing if  we learn how to modify or tweaks it  are not all  measurable...If we tweak...

But if we design , all that we made MUST BE measurable, by defintion of a good design... And it is better if the designer as atamasphere know about harmonics for sure... And i will trust him precisely because of that...

And he knows that objectivist as subjectivist are deluded focussing on the gear but forgetting about psycho-acoustic basic ...

Perhaps amplifier designer must be preoccupied by the way their design produce Harmonic spectra... 😊

He’s got a lot of company in that regard- many solid state amplifier designers don’t really care what sort of harmonic spectra their amps make.

III.
CONCLUSIONS
ß For fundamental frequencies of up to about 1400 Hz,
the pitch of a complex tone is determined by the second
and higher harmonics and not by the fundamental,
whereas beyond this frequency the opposite holds;
this is the case both for tones with harmonics of equal
amplitude and for tones with harmonics of which the
amplitudes fall by 6 dB/oct.
ß For fundamental frequencies
of up to about 700 Hz,
the pitch is determined by the third and higher har-
monics; for frequencies up to about 350 Hz, by the
fourth and higher harmonics.
ß The experimental results strongly suggest that the
pitch of complex tones is based on periodicity rather
than on frequency; it is reasonable
that this also holds
for simple tones.
 

Pitch of complex tones -Plomp- 1967 

«Both speech and music occupy similar, albeit slightly different frequency ranges. The lowest frequency element of speech is the fundamental frequency, which for a male voice is on the order of 100-125 Hz. (Johnson, 2003). In the human vocal tract, the vibration of the vocal cords for voiced sounds defines the fundamental frequency and its higher-frequency harmonic content and this limits the low-frequency end of the vocal output. There is simply no speech energy below the frequency of the fundamental. In contrast, musical instruments can generate significantly lower frequency with fundamental energy on the order of 40-50 Hz for bass instruments. Figure 1 shows a treble clef showing several musical notes and the frequency of their fundamentals. Middle C (just below the treble clef) is 262 Hz, and a typical male’s fundamental frequency is an octave below that (approximately 125 Hz).

However music, like speech, is slightly more complicated than just a rendition of any frequency components available or audible. In turns out that in music, like speech, it is not the fundamental frequency that defines the “pitch” of the note but the difference between any two successive harmonics. This is called the missing fundamental and explains why one only needs to hear the higher-frequency harmonics to define the pitch, which in some cases is below the bandwidth of the transmitter.»

https://journals.sagepub.com/doi/full/10.1177/1084713812468512