3e Audio TPA3251 TPA3255 Finished Amplifier with PFFB is coming!

[amarsicola]

No additional features, no sub out, no nothing. No power supply options to save 10$ - just offer the biggest one that really supports the specifications - and these should be honest. Overall, a simple product that focuses on quality and power for an affordable price, and just works

Fully agree. Please spend your money and effort in testing performance and testing the quality of manufacturing process. A couple of vocal customers unhappy for quality issues can ruin your sales.
Just give us a stereo version, with the best chip, balanced, a powerful power supply but with proper heat dissipation, decent connectors, and one feature only: the on/off button. And zero defects

 

[Guddu]

Sometimes an opportunity delayed could end up with opportunity missed, I hope it doesn’t happen with someone like 3e seeing the efforts.
But truth is that many ships have already sailed in last 6-10 months with the great show of advertising put up by Fosi with v3, ZA3 and then v3 mono.
Let’s hope enthusiasm carries over to this new 3e amplifier.

 

[harkpabst]

Sometimes an opportunity delayed could end up with opportunity missed, I hope it doesn’t happen with someone like 3e seeing the efforts.
But truth is that many ships have already sailed in last 6-10 months with the great show of advertising put up by Fosi with v3, ZA3 and then v3 mono.
Let’s hope enthusiasm carries over to this new 3e amplifier.

Why would you think that anybody interested in the quality level of 3e Audio would even consider the V3 or ZA3? Both are lacking PFFB, so they are not even formally on the same level.

The V3 Mono does feature PFFB, but at least according to Amir's measurements still can't touch the performance of the 3e Audio 480-1-29A kit. The stereo kit version 3e Audio 260-2-29A is absolutely on par as far as quality goes. I have all reason to believe that the finished amp will at least meet this performance.

Putting the "great show of advertising" into the perspective of actual sales: I received a marketing email from Fosi on Thursday, literally saying: "The first batch of 1,500 pre-sale units on our official website is completely sold out!" That leaves room for competitors aiming at even higher quality, I think. I'm looking forward to the TPA3251 based design in particular.

 

[Guddu]

@harkpabst Let me agree with you, and my best wished to 3e for their efforts and these new products.
No debate to your words but still worth clarifying or adding:

Why would you think that anybody interested in the quality level of 3e Audio would even consider the V3 or ZA3? Both are lacking PFFB, so they are not even formally on the same level.

I was implying this but something different, and certainly not about future buyers.

The V3 Mono does feature PFFB, but at least according to Amir's measurements still can't touch the performance of the 3e Audio 480-1-29A kit. The stereo kit version 3e Audio 260-2-29A is absolutely on par as far as quality goes. I have all reason to believe that the finished amp will at least meet this performance.

Agreed, but can you help with a quick list down of those performance parameters that can't touch the performance of 3e kit. I (and many others) would appreciate it, please.

Putting the "great show of advertising" into the perspective of actual sales: I received a marketing email from Fosi on Thursday, literally saying: "The first batch of 1,500 pre-sale units on our official website is completely sold out!"

This is true and gear result for Fosi for their efforts, and shows how many potential buys did go to v3 mono for a PFFB finished amplifier. I was relating this to the 1st point of yours I quoted in this post.

That leaves room for competitors aiming at even higher quality,

nothing more than a sarcasm.

Anyways, this thread is dedicated to 3e products and I would avoid mentioning another manufacturer product here.

 

[harkpabst]

Agreed, but can you help with a quick list down of those performance parameters that can't touch the performance of 3e kit. I (and many others) would appreciate it, please.

I linked to Amir's reviews. Everyone is free to follow these links and decide on their own what they feel is important. I won't even try to summarize or rate the results in any way.

But still, the raw measurement data is better for pretty much every single measurement, don't you agree?

nothing more than a sarcasm.

???
No sarcasm to be found in my words.

Anyways, this thread is dedicated to 3e products and I would avoid mentioning another manufacturer product here.

???
You explicitly named three different products made by another manufacturer. My response was just why I believe the 3e Audio products to be superior.

 

[Guddu]

I linked to Amir's reviews. Everyone is free to follow these links and decide on their own what they feel is important. I won't even try to summarize or rate the results in any way.

But still, the raw measurement data is better for pretty much every single measurement, don't you agree?

I already agreed it’s better, don’t see what you said like “can’t touch the performance of this one”.
Example, 2dB difference in SINAD in same potentially inaudible range doesn’t match to what you said…. but you might be referring other parameters which is why I asked you to list down… on your wish of course.

???

No sarcasm to be found in my words.

Not in your words, I meant the vendor’s statement you shared.

???
You explicitly named three different products made by another manufacturer. My response was just why I believe the 3e Audio products to be superior.

Correct, but only to that post to clarify my point. Else I have no interest in doing so.

Anyway, thanks.

 

[harkpabst]

I already agreed it’s better, don’t see what you said like “can’t touch the performance of this one”.
Example, 2dB difference in SINAD in same potentially inaudible range doesn’t match to what you said…. but you might be referring other parameters which is why I asked you to list down… on your wish of course.

OK, now I understand. My statement ("can't touch the performance") was not intended to imply the V3 Mono was miles behind, but I see how it could be read like this. I just wanted to point out that the 3e Audio amps are ahead in every single measurement performed by Amir. I didn't intend to comment on how meaningful the differences are regarding perceived SQ.

Not in your words, I meant the vendor’s statement you shared.

That clarifies everything for me. But I don't agree that this statement was intended to be cynical in any way. These devices are simply not sold in millions. They really seem to be happy with the outcome of the Kickstarter campaign.

The only reason I am posting anything in this thread is because I'm excited to see the 3e Audio products coming.

 

[Guddu]

The only reason I am posting anything in this thread is because I'm excited to see the 3e Audio products coming.

+1

 

[Ropeburn]

Guys, guys. Can we agree that, at least in the context of comparing them to 3e products, other brands and products in comparable price and performance ranges are perfectly fine to talk about, and that a discussion like that may even be useful for 3e to evaluate customer expectations etc.?

 

[SMen]

3e audio have an opportunity to improve on key areas over the Fosi models.

Firstly they can beat Fosi to the stereo PFFB version.
Secondly they can set improved measurements ... hopefully not by reducing gain
Thirdly, they can make them run cooler

and keep them truly balanced all the way through, including controlling the volume. I think they said the volume control would be switchable (I have a thing about volume controls because I think they are so influential).

But I too hope 3e don't take too long ... the mono "bird" sure has been flying with the PFFB V3 monos ... and will soon with 3255 stereo I suspect.

 

[Emiyanez]

@3eaudio looking forward to the PA version. A well implemented TPA-based stereo amp with an internal power supply for a decent price will sell like hot cakes!

 

[Totemis]

Is it coming soon the 3e Audio TPA3251 TPA3255 Finished Amplifier with PFFB ????

 

[SMen]

@3eaudio

Just following some 'asks' you made here about op amps, and following my experience with Fosi V3 mono - I think it is really important that if you have optimized PFFB using a particular opamp - if it is only one, then stipulate 1 opamp.
If it is 3 alternatives then stipulate 3 alternatives, ideally with some measurements.
That would be revolutionary on this forum ... and to provide balance on comments on any threads regarding your new products that will hopefully appear here soon on ASR.

 

[3eaudio]

@3eaudio

Just following some 'asks' you made here about op amps, and following my experience with Fosi V3 mono - I think it is really important that if you have optimized PFFB using a particular opamp - if it is only one, then stipulate 1 opamp.
If it is 3 alternatives then stipulate 3 alternatives, ideally with some measurements.
That would be revolutionary on this forum ... and to provide balance on comments on any threads regarding your new products that will hopefully appear here soon on ASR.

@SMen great suggestion, we can share op-amp test data as much as we can, like opa16xx series we used ,others will depend on availability,also member's testing are welcome.

 

[SMen]

@SMen great suggestion, we can share op-amp test data as much as we can, like opa16xx series we used ,others will depend on availability,also member's testing are welcome.

Thank you ... you have made my day ! Many / (most ?) users here don't have the equipment, but if you do this with measurements, it would be fantastic.
I am looking forward to reading about your new optimized product range with PFFB.

 

[3eaudio]

1. some op-amp sweep test on 1st A5 sample
2. Opa16xx are almost at the same level
3. NE5532(P) has less headroom when output swing close to rail supply
4. MUSES02 close to NE5532 and clipping a little bit faster
5. LM4562 very close to OPA16xx even it is a little bit older

FYI @SMen @daniboun @Guddu

 

[3eaudio]

first A5 sample,hope @amirm can test it soon.

 

[SMen]

This is extemely

1. some op-amp sweep test on 1st A5 sample
2. Opa16xx are almost at the same level
3. NE5532(P) has less headroom when output swing close to rail supply
4. MUSES02 close to NE5532 and clipping a little bit faster
5. LM4562 very close to OPA16xx even it is a little bit older

FYI @SMen @daniboun @Guddu
View attachment 394312

This is great thank you! I'll let those more expert than me comment, but for me this is excellent from a designer manufacturer!

 

[Guddu]

1. some op-amp sweep test on 1st A5 sample
2. Opa16xx are almost at the same level
3. NE5532(P) has less headroom when output swing close to rail supply
4. MUSES02 close to NE5532 and clipping a little bit faster
5. LM4562 very close to OPA16xx even it is a little bit older

FYI @SMen @daniboun @Guddu
View attachment 394312

Simply superb....... Thanks for the time and efforts with different opamp measurement data

first A5 sample,hope @amirm can test it soon.
View attachment 394314

Congrats @3eaudio
Looking really really good overall..... build quality looks robust as well.
would be great if you post back side pics of the amplifier.

P.E. After seeing 8-9 different TPA3255 finished amplifier on my desk (where some look funky, you might have seen those in my "Owners & user Impressions" threads), this simple case work reiterates elegance has unbeatable attraction.
Also, seeing some measurements with different opamps here makes me say every manufacturer should have this (or similar) data available for cusromers for clarify than
just claims before making it a sales pitch.

 

[SMen]

first A5 sample,hope @amirm can test it soon.
View attachment 394314

Yes I hope so also regarding the review ... don't forget the back view if you can!

And some final design decisions if any. Is the volume control bypassable or is it just set to maximum for this purpose (a very minor question for example)?

U+1F44D (that is the unicode for thumbs up)!