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

[FanatNsk]

Is it possible to disable the automatic shutdown function?
What is the scenario for this function:
1. If the DAC is off, will the amplifier automatically power off?
2. If the DAC is on but there is no audio signal coming from it, will the amplifier automatically power off?

 

[astamixa]

anyone fill in will get extra discount.

@3eaudio What way and when will the discount be provided?

 

[SMen]

Is it possible to disable the automatic shutdown function?
What is the scenario for this function:
1. If the DAC is off, will the amplifier automatically power off?
2. If the DAC is on but there is no audio signal coming from it, will the amplifier automatically power off?

To disable leave it on or off. Auto is just the middle option out of three.
The DAC does not need to be off, if there is no signal for 10 or so minutes they switch to standby when in auto mode.
Sometimes other electronics depending on your electrics, can make them switch on temporarily. Presumably something causes a signal. I'm in an old house so a light switch can make them sense a signal and switch on! But it is not a problem for me.

 

[harkpabst]

To disable leave it on or off. Auto is just the middle option out of three.

That's how it works with the Fosi V3 mono. There's no 3-way switch on the A5/A7 range, just the central push button/volume dial.

As far as I understand it there's no way to disable automatic power off after 5 minutes.

 

[SMen]

That's how it works with the Fosi V3 mono. There's no 3-way switch on the A5/A7 range, just the central push button/volume dial.

As far as I understand it there's no way to disable automatic power off after 5 minutes.

I got confused as to which forum I was on lol
Thank you, you are quite right, apologies @FanatNsk - good question.

 

[ICIETDIYEUR]

Hello 3eAudio

It seems that for the cooling of TPA325X chips, you have anticipated my idea for the 'upsidedown' implementation of the PCB in your case

This does not surprise me about you and it corresponds well with the type of reflections we were able to have together in your early days.

With 'film' type capacitors instead of chemical ones for audio links (even if they are ELNA SILMIC II since we know that a capacitor of this type does not work in these conditions as it should), you were close to perfection but the WIMA MKS210μF/50V are way too expensive

In any case, 'BRAVO' for these jewels

Kind regards.

 

[Piotr]

So, it's tomorrow? A big release?

Does anyone know if it'll be available in Europe or have an estimated shipping time from China to Europe, if released only in China?

 

[Inertiaman]

So, it's tomorrow? A big release?

Does anyone know if it'll be available in Europe or have an estimated shipping time from China to Europe, if released only in China?

My perception is all sales will be only thru Aliexpress, at least initially, so "available" to anyone/anywhere willing/able to use Aliexpress. Current shipping times to U.S. are 8-18 days, fwiw.

 

[3eaudio]

still a little bit delay than expected,too many procedure in factory,today just finished first sample assembly,it just look awesome
should be ready to order 12.12 (double discount? LOL)

 

[SMen]

still a little bit delay than expected,too many procedure in factory,today just finished first sample assembly,it just look awesome
should be ready to order 12.12 (double discount? LOL)

It would be good to know what the discount (that might be doubled) is??

I still can't make my mind up. Maybe @Archimago will get his part 2 up v. soon to help with this.

 

[Piotr]

still a little bit delay than expected,too many procedure in factory,today just finished first sample assembly,it just look awesome
should be ready to order 12.12 (double discount? LOL)

on 12.12 also on amazon? Or only aliexpress?

 

[harkpabst]

I still can't make my mind up. Maybe @Archimago will get his part 2 up v. soon to help with this.

I'm checking his blog like 24 times a day ... ... only to be disappointed again.

 

[PlasticDoc]

still a little bit delay than expected,too many procedure in factory,today just finished first sample assembly,it just look awesome
should be ready to order 12.12 (double discount? LOL)

You should take the time to do quality control. At this point, things like capacitors soldered with reverse polarity or thermal interfaces without thermal grease would be fatal.
Especially with the 3e Audio A7se (with a 48V/10A PSU)... which has the potential to be your most successful model.

 

[Tofffsy]

@3eaudio Are those specs opamps compatible with some of your amplifiers line?

Bipolar Input Operational Amplifier

Ultralow Distortion: 0.000015% at 1 kHz

High Slew Rate: 27 V/μs

Voltage supply +- 5V to +-18V

Work Temperature - 70*C

Thanks a lot

 

[Inertiaman]

@3eaudio Are those specs opamps compatible with some of your amplifiers line?

In my opinion, those op amps are incompatible with this forum.

 

[phoenixdogfan]

I'm checking his blog like 24 times a day ... ... only to be disappointed again.

Just let him know you're holding up his pay until he delivers the completed review.

 

[Tofffsy]

In my opinion, those op amps are incompatible with this forum.

Hahaha you should measure it maybe? No Idea what the result could be.
They sound better than anything I Heard before and I have a bunch of opamps here.
I was more than sceptical but they are return free for 30 days so I tried and they will stay here
My goal is not to create a controversy, I only want to know if they are compatible with the @3eaudio amplifiers boards because I think they will replace my Aiyima A07 Max

 

[harkpabst]

@3eaudio Are those specs opamps compatible with some of your amplifiers line?

Bipolar Input Operational Amplifier

Ultralow Distortion: 0.000015% at 1 kHz

High Slew Rate: 27 V/μs

Voltage supply +- 5V to +-18V

Work Temperature - 70*C

I think that these heat sinks won't fit the A5/A7 case opening, to start with. The depth might fit with these (contrary to Akliam LC5), but the width and height will not.

If you are looking into the 3e Audio DIY boards, the opamps are non-replaceable, as far as I know.

Generally speaking, the "technical data" you could provide is by no means sufficient to judge their compatibility. But just the fact that they will draw 170 mA of current would rule them out for me, sorry. Also remember: Without exception, any manufacturer who files off the type designations of ICs is dubious. Period. This explicitly includes Virtual HiFi. Some other guy who does so (he usually goes by the name of "Honest Tom" Evans) is into some kind of trouble with the community right now:

Repairing The Questionable £25,000 Tom Evans Audiophile Pre-Amp

This is a classic, perhaps the most entertaining of his videos that I've seen, and of particular interest to the ASR membership, so I hope the mods won't remove this thread. I laughed at the rubbed-out markings on the internal components, a practice that many other high-end audio...

www.audiosciencereview.com

The £25,000 Pre-Amp that went Wrong - Tom Evans Mastergroove SR mkIII

mirror of video mend It Mark that was taken down elsewhere for reference Repairing The Questionable £25,000 Tom Evans Audiophile Pre-Amp

odysee.com

At least back in June @3eaudio suggested that the default opamp will be OPA1656.

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

Hi Amigos: It has been for around 2 years after we release TPA3251 and TPA3255 series amplifier DIY kits with post filter feedback design that improve the overall performance of the single chip itself. With many buyers(diyer) enjoyed our diy kits and having so many fun from their own diy...

audiosciencereview.com

OPA1656 is not even in the official compatibility list of the Hypersonic. Better ask them first.

They sound better than anything I Heard before and I have a bunch of opamps here.

I am sure that you are sure of what you heard. Please, still ask yourself these questions: How did you evaluate those opamps? Why and how would the "sound" a certain opamp "generates" always be the same, regardless of the circuit it is used in?

You might be a victim of confirmation bias. Spending 170 bucks on an amplifier expected to be sold for less then 300 bucks doesn't sound very economic.

Just let him know you're holding up his pay until he delivers the completed review.

Why didn't I think of that myself so far? Sometimes it's so easy!

 

[Guddu]

3e-Audio A7 amplifier User Impressions & Owner's Thread:

3e Audio A7 [TPA3255 PFFB Stereo] Finished Amplifier - User Impressions | Owner's Thread

Dear FMs, This thread is dedicated to 3e's TPA3255 finished stereo amplifier - A7 User Impressions, feedback & observations. There are already few active threads which has loads of good discussion and information on development of this amplifier, here: 3e announcing A5/A7 amplifier line 3e...

www.audiosciencereview.com

I hope A7 users chime in with their impressions, feedback and observations when they get it.

 

[Inertiaman]

@3eaudio , will the SE models be fine when paired with "nominal" 4 ohm speakers that have an actual minimum impedance of ~3.2 ohm?
In other words, are your 4 ohm specs also "nominal-ized" like most speaker manufacturers specs?