• These commercial threads are for private transactions. diyAudio.com provides these forums for the convenience of our members, but makes no warranty nor assumes any responsibility. We do not vet any members, use of this facility is at your own risk. Customers can post any issues in those threads as long as it is done in a civil manner. All diyAudio rules about conduct apply and will be enforced.

TPA3255, TPA3251 with Post Filter Feedback(PFFB)

A higher performing but less powerful would be welcome for some high efficiency speakers like cd etc .

So not in any near futureagre

Hello 3Eaudio,
I know you do not like to answer any direct questions.

Anyway, if you would nice to tell us why we can not see your Ali Express shop in Germany. You actively excluded my location.

Not expecting a honest answer, really just a try.
Germany(and France maybe?) has a special legal package application that need apply per-year,so far we hasn't do that yet but plan in 2023.
then you may try again.

thanks!
 
  • Like
Reactions: 1 user
same as previous one, depend on your setup, for me i won't set it.
think about puifi,hypex module.......
Sorry, not familiar with "previous one". Am I correct in interpreting your reply as:

(A) Yes, there are pins/plugs on the board for interconnecting/syncing the boards if desired...
(B) ... but I don't bother myself (in the right setup, e.g. low-medium power application), similar to how most people don't with the Hypex/Purifi modules
 
Sorry, not familiar with "previous one". Am I correct in interpreting your reply as:

(A) Yes, there are pins/plugs on the board for interconnecting/syncing the boards if desired...
(B) ... but I don't bother myself (in the right setup, e.g. low-medium power application), similar to how most people don't with the Hypex/Purifi modules
the previous one is the old one(no feedback) we made before,
if you can read the manual in a short minutes, you may found more info on setup the board.
 
the previous one is the old one(no feedback) we made before,
if you can read the manual in a short minutes, you may found more info on setup the board.
Hello!

*No more socket for Op-Amp change?
*Which Op-Amp comes with?
*What can be change for improvement?
*What does the feedback for sound quality?
Thanks in advance!

PS. I have the old one with OPA1656 + Meanwell 48V + SB Acoustics speakers and love the sound of my 3e amp, thanks for build one of the best TPA3255.

Gustavo.
 
Hello!

*No more socket for Op-Amp change?
*Which Op-Amp comes with?
*What can be change for improvement?
*What does the feedback for sound quality?
Thanks in advance!

PS. I have the old one with OPA1656 + Meanwell 48V + SB Acoustics speakers and love the sound of my 3e amp, thanks for build one of the best TPA3255.

Gustavo.
due to feedback design ,it is not allow to change op-amp as it will degrade the performance.
it use opa1612 for best low noise and distortion, so it is very limited chance to change some components for improvement in diy point of view.
 
  • Like
Reactions: 2 users
Got 2 amps delivered this morning. I can say that I’m positively surprised- assembly and attention to details is top notch. It’s a smaller amplifier compared to other versions with top heat sink. It’s built like a tank, relatively massive CNC machined aluminum heat sink. Soldered OPA1612 with high quality passives. Post soldering could be a bit cleaner, other than that no complaints. Beautiful piece of tech, shame it will be hidden in a case. Planning to run 2x amps, separate 48V, fed through a ADSP21489 with CS4398 DACs. Hoping to connect all pieces together in a month. Great job 3e!
B17A81C1-AA65-4FD2-ACC9-961C96F2FB6E.jpeg
 

Attachments

  • 5F2DF5D8-19C0-48D7-86A7-CD758B831514.jpeg
    5F2DF5D8-19C0-48D7-86A7-CD758B831514.jpeg
    483.4 KB · Views: 323
  • F3E0F004-4380-4DF5-9B81-5FA18E06B08D.jpeg
    F3E0F004-4380-4DF5-9B81-5FA18E06B08D.jpeg
    477.4 KB · Views: 321
  • 543158A2-5973-4A8B-820F-B507C5C797CA.jpeg
    543158A2-5973-4A8B-820F-B507C5C797CA.jpeg
    283.7 KB · Views: 309
  • C701A48F-C6E1-4614-B025-A05B60AEB227.jpeg
    C701A48F-C6E1-4614-B025-A05B60AEB227.jpeg
    333.6 KB · Views: 304
  • 4AEA3899-B8B8-461B-82D7-00947AA4AC4F.jpeg
    4AEA3899-B8B8-461B-82D7-00947AA4AC4F.jpeg
    391.4 KB · Views: 291
  • Like
Reactions: 3 users
Got 2 amps delivered this morning. I can say that I’m positively surprised- assembly and attention to details is top notch. It’s a smaller amplifier compared to other versions with top heat sink. It’s built like a tank, relatively massive CNC machined aluminum heat sink. Soldered OPA1612 with high quality passives. Post soldering could be a bit cleaner, other than that no complaints. Beautiful piece of tech, shame it will be hidden in a case. Planning to run 2x amps, separate 48V, fed through a ADSP21489 with CS4398 DACs. Hoping to connect all pieces together in a month. Great job 3e!
View attachment 1121651
Looks very nice, share your experience about sound quality when you test it please.
 
Got a surprise package at my front door this morning, 2x 3e Audio
Got 2 amps delivered this morning. I can say that I’m positively surprised- assembly and attention to details is top notch. It’s a smaller amplifier compared to other versions with top heat sink. It’s built like a tank, relatively massive CNC machined aluminum heat sink. Soldered OPA1612 with high quality passives. Post soldering could be a bit cleaner, other than that no complaints. Beautiful piece of tech, shame it will be hidden in a case. Planning to run 2x amps, separate 48V, fed through a ADSP21489 with CS4398 DACs. Hoping to connect all pieces together in a month. Great job 3e!
View attachment 1121651
Got mine this morning, 13 days to US and arrived earlier than expected. Very well packaged considering the weather right now, package was literally waterproof and sat outside in the rain a bit, no water got inside. I can concur, very well built and heavy with the coilcraft inductors and solid machined aluminum heatsink.


Might be a while before I get it running, still waiting for the PSU's from Micro Audio.

@3eaudio Audio, what is J5 and J6 used for?
 
Hi 3e audio,
Currently I have 2 units of non feedback 3255 from 3e audio. Can I add the new tpa3255 with feedback to make a 6 channel amp? Eg use 3255 with feedback for mid, the old ones for high and low frequencies.

The old non feedback amp is out of stock. Are you still making/selling them?
 
  • Like
Reactions: 1 user