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

[MediumRare]

Are you saying that when the amp is supplying, say, 100W at midband and 1W at 10kHz, then the distortion spectrum changes at high frequencies? Drastically?
Mind you, we are not talking about clipping the amp, hence why I said 100W.

That's the hypothesis that the 32 tone and IMD charts imply. And because it's grass, not necessarily HD, it would have a higher degree of audibility as noise. But we have no data to know, only the indication at 5w that all is not well and that (especially at 5k) it gets worse as output rises.

 

[gvl]

Can someone spec the best value build possible using these modules?

 

[TurtlePaul]

But we have no data to know, only the indication at 5w that all is not well and that (especially at 5k) it gets worse as output rises.

A chart at -100 dB across the audible range and “not all is well”?

Class D has higher noise at higher frequencies. It is well known. It is inaudible.

 

[daniboun]

I finally finished my 3E Audio Dual Mono project checkout amigos :

"Bamboo Project" : Dual Mono 3E Audio 480-1-29A Amplifier

Hi amigos, Following the ASR review of the 3E Audio 480-1-29A Module, I decided to roll up my sleeves and show you that with a little elbow grease, you can create a very beautiful amplifier based on these nice 3E Audio modules. I called this project, "Bamboo"> the pictures will speak for...

www.audiosciencereview.com

 

[noel_fs]

what the actual fuck, i mean i suspected the tpa 3255 was like solid decent but this is actually good lol, how much does that power supply go for? or similar

 

[charlielaub]

Can someone spec the best value build possible using these modules?

At a bare minimum for functionality you need a power supply, the amp board, and a heat sink. The amp board is about $100 (a bit less for the mono board, a bit more for the stereo version) and a 48V power supply ranges from about $35 (e.g. Meanwell LRS-350-48 = 350W, fan cooled) to $100 (e.g. Meanwell UHP-500-48 = 500W, silent convection cooled). 3eAudio offers a convection cooled 300W SMPS for $85, but IMO 300W is a little underpowered. A heat sink might cost around $20-$40 (check out https://www.heatsinkusa.com/)

That's it, unless you want to put in in a case and have fancy connectors, etc. and then the cost will go up by another $100 or more. If you can make your own case and provide the connectors you will save a bundle.

A mass-produced, custom chassis for the 3eAudio boards would be very welcome. Maybe someone will step up and come up with a open-source (free) design and then people can order it from some fabricator. Wishful thinking at this point...

 

[Joe Smith]

At a bare minimum for functionality you need a power supply, the amp board, and a heat sink. The amp board is about $100 (a bit less for the mono board, a bit more for the stereo version) and a 48V power supply ranges from about $35 (e.g. Meanwell LRS-350-48 = 350W, fan cooled) to $100 (e.g. Meanwell UHP-500-48 = 500W, silent convection cooled). 3eAudio offers a convection cooled 300W SMPS for $85, but IMO 300W is a little underpowered. A heat sink might cost around $20-$40 (check out https://www.heatsinkusa.com/)

That's it, unless you want to put in in a case and have fancy connectors, etc. and then the cost will go up by another $100 or more. If you can make your own case and provide the connectors you will save a bundle.

A mass-produced, custom chassis for the 3eAudio boards would be very welcome. Maybe someone will step up and come up with a open-source (free) design and then people can order it from some fabricator. Wishful thinking at this point...

I think someone could offer completed amps in simple cases for less than the Audiophonics build...either as monoblocks or a stereo version...

 

[antcollinet]

I think someone could offer completed amps in simple cases for less than the Audiophonics build...either as monoblocks or a stereo version...

I doubt they could undercut Audiophonics by much if they wanted it to be a sustainable business.

 

[olieb]

I doubt they could undercut Audiophonics by much if they wanted it to be a sustainable business.

That is true for building from 3eAudio modules in EU in a small series.
But Fosi V3 can be bought under 100€ for the whole (stereo) amp with 48V PS. And PFFB is not that big of a difference in cost.

 

[antcollinet]

That is true for building from 3eAudio modules

That is what we are talking about.

 

[olieb]

That is what we are talking about.

Well you left out the part with EU and small series.
In East Asia on a different scale it would be still possible to undercut Audiophonics price considerately.

 

[antcollinet]

Well you left out the part with EU and small series.
In East Asia on a different scale it would be still possible to undercut Audiophonics price considerately.

Perhaps - but not with the equivalent level of after sales support in EU.

 

[xschop]

Gents, can someone give the dimensions of the rear connections panel? I'm highly considering this board for my next custom case build. You guys did a great job implementing the PFFB. Thank you.

 

[3eaudio]

@xschop this one

 

[brunes]

When might you have the mono board back in stock

 

[xschop]

@xschop this one

Thank you!

 

[Punchy_Power_Cat]

How much power does it consume in idle/standby? I suspect the PFFB to be on the higher side. Probably 20W or even more.

 

[daniboun]

I think someone could offer completed amps in simple cases for less than the Audiophonics build...either as monoblocks or a stereo version...

Check my "Bamboo" project. Did my dual mono amp for less than $400

 

[antcollinet]

How much power does it consume in idle/standby? I suspect the PFFB to be on the higher side. Probably 20W or even more.

I can't imagine why PFFB would have any noticeable impact on power consumption whatsoever.

 

[restorer-john]

This graph tells me that the amp, behaves differently at different frequencies. What I see is that 32 tones, played at the same time, comes out differently.

It kinda shows the opposite. The amplifiers is dead flat in the bandwidth shown. Consider the amplifier only deals with one waveform, not 32. At any instant, there is only one voltage presented to the amplifier.