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Which TPA3255 amp do you recommend?

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Deleted member 9685

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If you search aliexpress.com for TPA3255, you get various TPA3255 amp boards with capacitors which can take 48V voltage input.
However, the sellers usually don't tell me about voltage regulator.

This TPA3255 amp uses LM2575T-12 voltage regulator on the product pictures although its working voltage is 48V.
According to digikey, its maximum voltage input is 40V which doesn't seem safe for use with a 48V power supply.

Do you know any affordable TPA3255 amp that you can use with 48V power supply?

Do you also know any affordable 48V power supply that produces clean power and doesn't run its fan when it is not hot?
 
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Affordable is a relative term - better to give an upper limit for price.

3E - ebay shows 2 available still, not much more than the generic one you linked and appears to perform around TI's spec which the generic one doesn't. Their matching PSU is fanless but seems not to be available any more. Connex and Meanwell should have something suitable available.
 
Affordable is a relative term - better to give an upper limit for price.

3E - ebay shows 2 available still, not much more than the generic one you linked and appears to perform around TI's spec which the generic one doesn't. Their matching PSU is fanless but seems not to be available any more. Connex and Meanwell should have something suitable available.

  • 3E EAUMT-0260-2-A doesn't ship to my location. It doesn't ship to many locations. I don't really think 3E wants to sell many TPA3255 amps. If they are not interested in selling, I'm not going to pursue their products, either. I also don't know how I would control volume with 3E EAUMT-0260-2-A.
  • It seems ICE2QS03G 200W-36V Quasi-Resonant Power Supply is the only power supply 3E sells.
  • If allo.com released a TPA3255 amp, I might be interested.
  • Mean Well LRS-350-48 Power Supply(48V 350W) looks promising since it turns its fan on and off, depending on its temperature.
    According to customers on amazon.com, a 100W class-D amp is not powerful enough to engage its fan.
    It turns on the fan when its temperature is higher than 50 degrees celcius and turns it off if the temperature goes below 40 degrees celcius.
 
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I'm using a 3E 3255 with the LRS-350-36 currently, although I have the 48V supply that I'll switch to when I change cases. From my reading of the diyaudio threads at the time, the 3E was clearly the preferred off-the-shelf alternative to the TI EVM itself. If 3E absolutely won't ship to your location, I'd probably suggest looking into the EVM availability. None of the ebay alternatives ever seemed to generate much consistent positive feedback. This was a year ago though, so it's possible there are some new players.

The 3255 amp is ok - I used it full-range until I got my Neurochrome Mod-86, and my subjective impression is that the Mod-86 is a clear step ahead (unvalidated through formal testing though). I ran the 3255 in a prototype setup driving the woofers in a bi-amped speaker (Dayton RSS210-HF with the NHT Xd monitors on top) and the overall system sounded fantastic and so my plan is to keep it on woofer duty once I get the new system set up with the MiniDSP SHD.
 
3E doesn't ship to my location. I cannot find TI TPA3255 EVM.
According to diyaudio, TI TPA3255 EVM died because it couldn't endure 48V.
Plus, they don't have a volume knob.

Currently, I'm considering
  • TPA3116/TPA3118 (It has just enough power to drive my speakers at 97dB with THD+N of 0.1%)
    • SMSL SA100
    • Allo Volt+ with Stepped Attenuator
  • TPA3255 (Haven't been tested much by people)
    • Generic chinese TPA3255 amp + a 32V 5~6A adaptor.
      • This is the most hassle-free option for TPA3255 at this moment.
    • Generic chinese TPA3255 amp + LRS-350-36 (36V 350W)
      • I don't know whether any chinese TPA3255 amp has a 12V voltage regulator that is safe with 36V power.
    • Generic chinese TPA3255 amp + LRS-350-48 (48V 350W)
      • I don't know if any generic TPA3255 amp is safe with 48V voltage input.
  • ...
 
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I think TPA3251 amps sold on aliexpress.com are more polished than TPA3255 amps for now.
TPA3251 amps do not have bluetooth connectivity which tends to degrade audio quality even when bluetooth is not used.

I will probably review a TPA3251 amp from AIYIMA with a 32V 5A adapter in a few weeks.
 
Today, xrk971 with the TPA3255 class-D chip and very clean power.

https://www.diyaudio.com/forums/gro...eference-design-class-amp-gb-post5928468.html

xrk971-TPA3255-rev0b-Silmic-Caps-01.jpg



H2 dominant

index.php
 
@maty I understand your passion. But, I am looking for an end product that works out of the box.
 
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The problem is that cheap Asians implementations, for now, are not worth it, at least to feed the tweeters, where the class D usually have problems.

I am always thinking about music and excellent recordings. Modern commercial music and films are other world.
 
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I am always thinking about music and excellent recordings. Modern commercial music and films are other world.

They are one and the same in my point of view. They are all audio.

The problem is that cheap Asians implementations, for now, are not worth it, at least to feed the tweeters, where the class D usually have problems.

What problems? Perhaps, should I just wait for Allo Volt TPA3255?

Can you toss your thoughts on my thread about TPA3251?
 
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I decided to stick with chinese generic TPA3251/TPA3255 amps for now.... They work fine.

Indeed they all work fine, I have the TI EVM boards, cheap chinese boards, 3 eaudio stereo and monos...
They all sound good, but my favorite is the 3eaudio monos with 3eaudio smps.
But I could live with all of them...
Still would love to see all these boards measured here :)
 
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I'm also interested at those amp's.
Can you share maybe some opinions about:
3e audio PS vs. Meanwell PS and 3e audio stereoboard vs. 3e audio monoboard.

Would really appreciate :)
 
I am happy with this combo.
Cannot say its a big difference with the stereo and meanwell power supply...
Only thing I know is that it sounds wonderfull.
And I have had a chance to hear a lot of poweramps...
In short: nothing left to be desired.
 
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Looks like you can get 3e boards again. May have to try one and make another DIY amp with it. I think the Meanwell might limit peak power due to it's current capability, but have never measured it with my EVM board.
 
3E doesn't ship to my location. I cannot find TI TPA3255 EVM.
According to diyaudio, TI TPA3255 EVM died because it couldn't endure 48V.
Plus, they don't have a volume knob.

Currently, I'm considering
  • TPA3116/TPA3118 (It has just enough power to drive my speakers at 97dB with THD+N of 0.1%)
    • SMSL SA100
    • Allo Volt+ with Stepped Attenuator
  • TPA3255 (Haven't been tested much by people)
    • Generic chinese TPA3255 amp + a 32V 5~6A adaptor.
      • This is the most hassle-free option for TPA3255 at this moment.
    • Generic chinese TPA3255 amp + LRS-350-36 (36V 350W)
      • I don't know whether any chinese TPA3255 amp has a 12V voltage regulator that is safe with 36V power.
    • Generic chinese TPA3255 amp + LRS-350-48 (48V 350W)
      • I don't know if any generic TPA3255 amp is safe with 48V voltage input.
  • ...
I built year ago tpa3255 Chinese but ELNA capacitors (50$) with power supply 48v DC 800w (80$).
case 3 D printed for a total 140$ include all connectors.
coupled with minidsp ddrc24 as preamp
never needed full power.
it has been compared with very high price AB power amps. No one distinguished in blind testing. I have REW distortion comparison charts
worth the price to me.
best
 
Built another one...keeps me busy during this corona lockdown.
 

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