Which TPA3255 amp do you recommend?

[Audiotone]

Those are superb capacitors for this system. Hard to find those vintage versions. Have you tried any other 10000uf caps that are currently available and sound just as good. I'm about to set up essentially the same system, but with a SMPS, same one you've shone in other posts.

Any good quality elco is fine + a solen mkp cap in parallel, I used the black gates because I had them...
Sounds already good without them

 

[Audiotone]

Hi,
I am about to build something just like this. I am waiting for the two 3e audio single channel TPA3255 and plan to use the Mean Well SMPS - I see you have two of the quasi-resonance power boards from 3e Audio - they said they are not going to make any more.
I was curious about those Vintage Rubicon Caps - those are rare. Do you have a suggestion for another good quality cap for the same purpose?
Also, do you have an on/off switch?
Thanks
Stephen

https://www.audiophonics.fr/en/capa...electrolytic-capacitor-63v-10000f-p-9633.html
But there are many so called high end caps out there...mundorf...never tried these.
Put a small solen mkp over the elco and that works fine.

I do not use a on/off switch but a remote controlled smart plug.

 

[nodigital]

Looking at what could be done with the 3e DSP in the SY-DAPx002 products I came across a description of using SigmaStudio with the 1701 DSP and REW for auto EQ. Might be of some use to gauge what's required to make use of the DSP functionality
https://ez.analog.com/dsp/sigmadsp/f/q-a/64304/adau1701-sigmastudio-rew-auto-eq/362660#362660

Having pondered about the product, what will change it from niche to mainstream is the ability for the average user to upload preset DSP configurations. Its the software and approachability that will make the difference. Done right, there's a big market place combined with enthusiastic support of a technically capable community. Imagine if it was possible for the more advanced to REW the amp and speakers, and saving configurations to a shared location. Those configs might be flat, some with bass boost, etc. Having an app with bluetooth connection that allowed a user to select one of those configs and upload to the amp would make it accessible for everyone, a sales opportunity to promote tuned combinations, etc. Cracking open a case, adding specialist USB connection, opening up DSP tooling, etc is at a level that is very, very niche. If the amp is currently tuned to a speaker combo, its tuned at a preset that might not be suitable for the listener (Too little base, too flat, etc), particularly in the listening position (Could be anywhere at this price point and unlikely to be optimally positioned). Without the easily accessible DSP configuration its potentially a niche amp sold to special enthusiasts - The difference of selling a few hundred or a hundred thousand.

For me, I'm in that niche from a software background so very much looking forward to trying one out.

 

[nodigital]

Taken a bleeding edge leap of faith and ordered a SY-DAP1002. 3e's usbi interface isn't yet available (a few weeks was mentioned), the regular Sigma ones look like £70+ and the Aliexpress versions are £35-45. So, to program the DSP adds 50-100% on the cost of the amp. Lets hope it adds 200% improvement

 

[somebodyelse]

https://freedsp.github.io/ - see the 'Programmer' section about half way down for a couple of alternatives. If the I2C interface is exposed you should be able to program via that too - that's how the HifiBerry boards do it IIRC.

 

[Lorenzo74]

Looking at what could be done with the 3e DSP in the SY-DAPx002 products I came across a description of using SigmaStudio with the 1701 DSP and REW for auto EQ. Might be of some use to gauge what's required to make use of the DSP functionality
https://ez.analog.com/dsp/sigmadsp/f/q-a/64304/adau1701-sigmastudio-rew-auto-eq/362660#362660

Having pondered about the product, what will change it from niche to mainstream is the ability for the average user to upload preset DSP configurations. Its the software and approachability that will make the difference. Done right, there's a big market place combined with enthusiastic support of a technically capable community. Imagine if it was possible for the more advanced to REW the amp and speakers, and saving configurations to a shared location. Those configs might be flat, some with bass boost, etc. Having an app with bluetooth connection that allowed a user to select one of those configs and upload to the amp would make it accessible for everyone, a sales opportunity to promote tuned combinations, etc. Cracking open a case, adding specialist USB connection, opening up DSP tooling, etc is at a level that is very, very niche. If the amp is currently tuned to a speaker combo, its tuned at a preset that might not be suitable for the listener (Too little base, too flat, etc), particularly in the listening position (Could be anywhere at this price point and unlikely to be optimally positioned). Without the easily accessible DSP configuration its potentially a niche amp sold to special enthusiasts - The difference of selling a few hundred or a hundred thousand.

For me, I'm in that niche from a software background so very much looking forward to trying one out.

Hi
what you described is what I have since few years now.

minidsp DDRC24 + WG FI adapter + Umik1 + minidsp app

I can record freq respons, tune it, time align drivers, digital crossover with my sub and choose among 4 options on the fly. The tune again the best By doing same process.
I believe many have spent X10 times more on dac, amp, speaker and Cables! But being far from my results. IMHO.
have a look at the SHD amp from minidsp. 1500$ and you get all you need.
my Best
L.

 

[nodigital]

https://freedsp.github.io/ - see the 'Programmer' section about half way down for a couple of alternatives. If the I2C interface is exposed you should be able to program via that too - that's how the HifiBerry boards do it IIRC.

That's very useful direction, thanks. Looks like a £5 USB board with an adaptor which presuming it adds a set of 2k2 resisters on the I2C lines and makes for easy pinout.

Also just come across a wifi version using a very cheap Wemos D1 mini (Of which I have a few...) which could be an interesting alternative. Having it permanently connected would open up some flexible interfacing options and use cases.
https://ez.analog.com/dsp/sigmadsp/...rface-for-sigma-studio-using-esp8266-or-esp32

 

[somebodyelse]

Nice find. Reminded me that the Auverdion Aurora uses an ESP for programming and control via web interface. Some alteration would be required, but the code is available:
https://github.com/freeDSP/freeDSP-aurora/tree/master/SOURCES/WEBAPP/ESP32
Following either route you might be able to have synchronised control of multiple amps...

What I still don't see is documentation that says which pins are exposed, so we could be getting ahead of ourselves here.

 

[nodigital]

Indeed a lot of assumption. The amp connector looks very much like the standard eval board connector so assuming similar arrangement for pinouts. 3e will confirm I presume when asked.

Wonder if its worth starting a new posting thread for this amp as its going well off topic for this one and there's probably a lot more to cover on it?

 

[somebodyelse]

New thread seems good to me - remind me if I don't spot it. I'm currently an interested bystander considering active crossover options.

 

[3eaudio]

Indeed a lot of assumption. The amp connector looks very much like the standard eval board connector so assuming similar arrangement for pinouts. 3e will confirm I presume when asked.

Wonder if its worth starting a new posting thread for this amp as its going well off topic for this one and there's probably a lot more to cover on it?

it is a standard USBi connector,
PIN1-SCL
PIN3-SDA
PIN10-GND

 

[m_g_s_g]

Thanks, @3eaudio!

Note that there’s a specific thread for your all-in-one dsp amplifier here.

Is this the complete USBi pinout?

 

[robertospeed]

bought the TPA3255 amplifier, do you recommend a power supply that can be combined? I understand very little about these things.

 

[somebodyelse]

bought the TPA3255 amplifier, do you recommend a power supply that can be combined? I understand very little about these things.

Which one is it? A link to wherever you bought it from would help as there are some variations. The ones I've seen have all included a suitable power supply I think. If the supplier doesn't give enough information you may have to open the amp and check the components installed, mainly for the voltage rating on capacitors and the exact part number of the regulator.

 

[robertospeed]

specificazione:

Chip amplificatore: TPA3255
Potenza di uscita: 300 W + 300 W.
Numero di canali: 2.0 canali / Stereo
Alimentazione: DC24-48V (diametro esterno 5,5 mm diametro interno 2,5 mm)
Consiglia alimentatore DC48V 5A
Impedenza: 4-8 Ohm
Dimensioni: 151 * 100 * 33MM

La confezione include:

Amplificatore audio digitale TPA3255 da 1 pezzo (senza alimentazione)

 

[scherbakov_al]

I got this:
https://aliexpress.ru/item/4000410819688.html?spm=a2g0s.9042311.0.0.5e1a33edOCM5EP

And the power supply:
https://aliexpress.ru/item/33053341453.html?spm=a2g0s.9042311.0.0.5e1a33edOCM5EP

I made a measurement using Steinberg UR12:

THD:


Impulse:


In general, I am satisfied ..
I burned my tweeters. (Not by this dimension, but earlier ..) Could I have damaged the amplifier? (I loaded the 18000Hz sine speakers at full volume.) (Fool)). Although the graphs do not seem to show problems ..

 

[robertospeed]

I bought one now 36V, 5A is good?

 

[somebodyelse]

Hmm...600W output from 240W input isn't going to be sustainable

I bought one now 36V, 5A is good?

That should be ok.

 

[robertospeed]

Which one is it? A link to wherever you bought it from would help as there are some variations. The ones I've seen have all included a suitable power supply I think. If the supplier doesn't give enough information you may have to open the amp and check the components installed, mainly for the voltage rating on capacitors and the exact part number of the regulator.

https://www.ebay.it/itm/TPA3255-Amp...952917?hash=item4218534915:g:xLwAAOSwoZpeurnb
I have focal chorus 726 speakers, which I play with a denon pma 1500ae, now I'm a little afraid to make them play with the TPA3255

 

[Toku]

https://www.ebay.it/itm/TPA3255-Amp...952917?hash=item4218534915:g:xLwAAOSwoZpeurnb
I have focal chorus 726 speakers, which I play with a denon pma 1500ae, now I'm a little afraid to make them play with the TPA3255

I also bought this amplifier, but the pop noise when turning the power on and off is amazing. Testing with expensive speakers should be stopped.