3e audio TPA3255 260-2-29A Amplifier Review

[3eaudio]

Hi Amigos
want to share some info on Rev B released recently:

1. Input Opamp Change to OPA1556,this is due to part unified that we found it perform the same as OPA1612 in another project.
2. add a optional 12V connector (not populated) for some people that need for power LEDs,etc.
3. Buck cap change to 1500uF/80V/Nichicon due to 1800uF/63V/Rubycon not able to purchase.

share a test between OPA1612 and OPA1656

 

[Zek]

Input Opamp Change to OPA1556

You mean OPA1656...

 

[somebodyelse]

add a optional 12V connector (not populated) for some people that need for power LEDs,etc.

Current rating?

 

[3eaudio]

Current rating?

good question,from general usage case,below 100mA is safe.

 

[Overseas]

@3eaudio
Would you present the revision also for the 480 board ?

 

[daniboun]

@3eaudio
Would you present the revision also for the 480 board ?

They answered previsously. Yes Rev B is for both : Mono + Stereo modules )

 

[Overseas]

My 480 mono boards received yesterday from Audiophonics have Rubycon, so what version do I have ? Before ordering, Audiophonics confirmed to me it is the 'recently revised version'.
How does it work: initial version/ Rev A/ Rev B or just A / B ?

 

[Overseas]

Mistery solved.
Rev B, but Rubycons.

 

[jlx]

Hi Amigos
want to share some info on Rev B released recently:

1. Input Opamp Change to OPA1556,this is due to part unified that we found it perform the same as OPA1612 in another project.
2. add a optional 12V connector (not populated) for some people that need for power LEDs,etc.
3. Buck cap change to 1500uF/80V/Nichicon due to 1800uF/63V/Rubycon not able to purchase.

View attachment 362981

share a test between OPA1612 and OPA1656

As it appears the spec sheet has not yet been updated, can you provide the maximum current for the new 12V output connection?
Thank You

 

[daniboun]

As it appears the spec sheet has not yet been updated, can you provide the maximum current for the new 12V output connection?
Thank You

 

[Sokel]

View attachment 364277

After what I saw here I would check every single module and component,rule is that if it happens once,it happens again,so be cautious:

9 Channel 3E Audio Amp(s) project

My new amp modules just arrived! I will soon (after a 2 week trip) start building these into my home theater system - an Onkyo RZ50 in 5.2.4 configuration. This build is actually 2 separate but identically looking amps: - a chassis containing (3) mono amp modules powered by Mornsun LOF750-20B48...

www.audiosciencereview.com

 

[daniboun]

Après ce que j'ai vu ici, je vérifierais chaque module et composant, la règle est que si cela se produit une fois, cela se reproduit, alors soyez prudent :

9 Channel 3E Audio Amp(s) project

My new amp modules just arrived! I will soon (after a 2 week trip) start building these into my home theater system - an Onkyo RZ50 in 5.2.4 configuration. This build is actually 2 separate but identically looking amps: - a chassis containing (3) mono amp modules powered by Mornsun LOF750-20B48...

www.audiosciencereview.com

This can happen in "low volume" productions. I'm on my 4th 3E Audio project, I haven't had any problems.

 

[Sokel]

This can happen in "low volume" productions. I'm on my 4th 3E Audio project, I haven't had any problems.

The advantage of low volume should be the opposite as every single module is supposed to be tested.

On the other hand though I would expect the people who built amps out of them to be experienced and have the way to measure the outcome.
Even if in that specific case a quick look would be enough.

 

[daniboun]

The advantage of low volume should be the opposite as every single module is supposed to be tested.

On the other hand though I would expect the people who built amps out of them to be experienced and have the way to measure the outcome.
Even if in that specific case a quick look would be enough.

However, I confirm that 3E Audio should check their module more carefully.
@3eaudio > hope you read this....

 

[3eaudio]

thanks @daniboun
the solid cap has less leackage current and then the voltage output still maintain normal that we didn't capture during testing.
will keep in mind and improve build quality.

 

[daniboun]

For those who would like to read the complete test of the 3E Audio Rev B Module, it's here:

"Bamboo V2" project. 3E Audio 260-2-29A Stéréo Rev. B (OPA1656) + PFC/LLC PSU. APx555 Measurements )

Hi amigos, Before starting, I suspended the measurements of the first project "Micro Bamboo." I will come back to the quick measurements at the end of May finally, I still have to speak with Sami about his Micro Audio PSU... am focusing on this thread only on the measures of the "Bamboo V2"...

audiosciencereview.com

 

[Orosei]

Hallo, I would like to built a Amp using the 3e Audio modules but I only have RCA on hand. Is it possible to connect from RCA to XLR like Hypex mentioned in his paper, with a appropriate RCA to XLR cable? Or will this not work with this amp modules? I don't think I'm able to resolder the resistors on this PCB.

 

[3eaudio]

@Orosei it can,see this

9 Channel 3E Audio Amp(s) project

My new amp modules just arrived! I will soon (after a 2 week trip) start building these into my home theater system - an Onkyo RZ50 in 5.2.4 configuration. This build is actually 2 separate but identically looking amps: - a chassis containing (3) mono amp modules powered by Mornsun LOF750-20B48...

audiosciencereview.com

 

[3eaudio]

Hi Amigos

We are planning to make a finished amp(without integrated PSU) based on diy kits, is anyone will interesting?

@daniboun

 

[oldandintheway]

Sure, I'm interested. Finished or even having something like the Ghent case kits for Hypex amp's would be good.