3e Audio TPA3255 Amplifier Kit 480-1-29A Review

[CamRector]

Let s see what Bruno Putzeys thinks about this

UCD180 questions

mains filtering with regards to a power supply for the UcD modules, what is the done thing in terms of mains filtering. a design posted earlier by paradigm used an X-Cap across the active/neutral mains lines. other designs ive seen use a varistor. ive also seen IEC sockets with mains...

www.diyaudio.com

I don’t doubt what he says is true for most. Especially 20 years ago lol
My system ground is completely seperate from my home. Each component chassis is connected to the Puritan route/ground master then to 2 seperate exterior 8ft grounding rods.
The Puritan 156 is has its own isolated direct circuit.

 

[daniboun]

I don’t doubt what he says is true for most. Especially 20 years ago lol
My system ground is completely seperate from my home. Each component chassis is connected to the Puritan route/ground master then to 2 seperate exterior 8ft grounding rods.
The Puritan 156 is has its own isolated direct circuit.

Anyway have fun with your project and share final results asap ---))

 

[CamRector]

Anyway have fun with your project and share final results asap ---))

For sure.
Every hypex and Purifi VTV amplifier has a IEC emi filter. Those amps seem to get a lot of love around here.

 

[lazerharp]

Would be nice to have a dual mono from Audiophonics. I asked and got this answer

"At the time we speak it's not planned ... but why not if there's enough demand ."

 

[mike70]

Would be nice to have a dual mono from Audiophonics. I asked and got this answer

"At the time we speak it's not planned ... but why not if there's enough demand ."

if the price goes next to Hypex / Purifi dual mono ... i don't know
The actual audiophonics 3e is close to the Hypex integrated modules (amplifier + power supply + buffer) price tag, so the 3e amplifiers have their arguments, but if the price goes close to the internally separated components ... is another thing. 3e needs more miles in the highway to compete (i think).

 

[welwynnick]

I don't know. The premium amplifiers - specifically NCx, Nilai and Pufiri - still have quite a significant price premium.

The older Hypex technologies like NCore sit somewhere in between 3E and the premium amps - both in performance and in pricing.

The 3E amps are a few dB better than the NCore amps with integrated amp and PSU (502, 252), though the latter are quite powerful.

 

[mike70]

I don't know. The premium amplifiers - specifically NCx, Nilai and Pufiri - still have quite a significant price premium.

The older Hypex technologies like NCore sit somewhere in between 3E and the premium amps - both in performance and in pricing.

The 3E amps are a few dB better than the NCore amps with integrated amp and PSU (502, 252), though the latter are quite powerful.

the differences between ncore and nilai are for bat ears, and "older" is what? 5 years? i know we're in the "tik tok" times ... but, please
i don't say that buy nilai isn't worth it, but i say that TODAY i'll prefer a ncore implementation over 3e if they are in the same price tag.

3e is good and if they're cheaper is something to try, in other case i prefer the solid options. It happens with everything in life, higher risk must be cheaper or with better profit.

 

[charlielaub]

Even the "older" UcD line of amplifier modules from Hypex are quite good by today's standards and you can still purchase them because they are still in production and used in commercial products.

 

[welwynnick]

I agree about the bat's ears, and I agree about reliability. I trust Hypex.
However I don't think you need bat's ears to exclude ICE and UcD, and I have a slight nagging doubt about NCore.
There are few good tests (though plenty of Purifi etc) but the ones I've seen have significantly rising distortion at high power. Fine to 5 or 10 watts, but increasing after that.
I think the 3E amps are better at keeping low distortion at high power. Not just low at the headline 5W level, but carries on getting lower.

 

[mike70]

I agree about the bat's ears, and I agree about reliability. I trust Hypex.
However I don't think you need bat's ears to exclude ICE and UcD, and I have a slight nagging doubt about NCore.
There are few good tests (though plenty of Purifi etc) but the ones I've seen have significantly rising distortion at high power. Fine to 5 or 10 watts, but increasing after that.
I think the 3E amps are better at keeping low distortion at high power. Not just low at the headline 5W level, but carries on getting lower.

Interesting.
How that correlates to Amir tests?

 

[welwynnick]

I've owned several amplifiers that fall in the middle of Amir's ranking order. For me, those that measure 80dB SINAD or worse sound poor, and that includes a few ICE amps.

 

[maty]

About RF/EMI filters..

Inlet filter + Micro Audio SMPS1K2-SKU at Orchard Starkrimson Stereo Ultra DIY kit, class D

Starkrimson Stereo Ultra DIY Kit 2.0

Starkrimson Stereo Ultra DIY Kit - DIY Stereo Amp Kit

Starkrimson Stereo Ultra DIY kit that includes all parts to assemble the amplifier in the desired configuration.

orchardaudio.com

 

[daniboun]

About RF/EMI filters..

Inlet filter + Micro Audio SMPS1K2-SKU at Orchard Starkrimson Stereo Ultra DIY kit, class D


Starkrimson Stereo Ultra DIY Kit 2.0

Starkrimson Stereo Ultra DIY Kit - DIY Stereo Amp Kit

Starkrimson Stereo Ultra DIY kit that includes all parts to assemble the amplifier in the desired configuration.

orchardaudio.com

I only see here a standard IEC / EMI filter ....
This is a $2000 amplifier BTW

 

[SonicSleuth]

Some bits of mine arrived, 'Poo'chicon caps booo and only 3.75A air-cooled.

 

[brunes]

You are ahead of me, just the SMPS so far.. 3e tomorrow case next week.

 

[daniboun]

You are ahead of me, just the SMPS so far.. 3e tomorrow case next week.
View attachment 345014

Interesting. Seems we got a different revision of the PSU. Mine is using 4700uf Elna output caps and yours 3900uf Nichicon caps.
I also see that the transformer for aux. out is different. The last revision seems to have son Meanwell IRM 03-5 Encapsulated power supply

 

[brunes]

I went with +51v , I think you went with 48, perhaps thays why? No idea to be honest.

 

[daniboun]

I went with +51v , I think you went with 48, perhaps thays why? No idea to be honest.

This not related to this. Aux outs have the same spec. We just have a different revision.
Moreover the output caps are rated @63v should be the same with the Nichicon but I cant see in the picture.

 

[maty]

I can see a white Electel MKTX84 470 nF 275 Vac polyester capacitor

Home

Electronic-Bauteile Görlitz GmbH

www.electel.de

 

[SonicSleuth]

What's the "SE" mode of this module?