TPA3255 - all about DIY, Discussion, Design etc

[saran008]

I only own Hypex Ncore nc500mp 250mp dual mono and 502.
Next step Gan amps )

Hahaha.. so waiting for Doc to finish and fine tune?

 

[chips666]

Hypex Nc400 or Purify?

//

Hi,

I owned NC400 and heard Purifi at a friends place
I also owned NC502MP and Icepower 1200AS2
Tried several TPA3255, dual mono, RCA, XLR and bypassed opamps

The differences are very small
and difficult or even impossible to determine in a proper AB blind test

Hypex,Icepower and TPA3255 they all sound good

I prefer drMordor TPA3255 with PFFB

Lets see what Gan amps will bring, looking forward

 

[daniboun]

Hi,

I owned NC400 and heard Purifi at a friends place
I also owned NC502MP and Icepower 1200AS2
Tried several TPA3255, dual mono, RCA, XLR and bypassed opamps

The differences are very small
and difficult or even impossible to determine in a proper AB blind test

Hypex,Icepower and TPA3255 they all sound good

I prefer drMordor TPA3255 with PFFB

Lets see what Gan amps will bring, looking forward

This confirms that DrMordor modules are great and everyone seems to have the same opinion. The new one with integradted LLC PSU is one of my best Class D amp.

Thanks to DrMordor who made a very very good job !

 

[cdsgames]

No)))
I did, my load is weak, but I got less than 0.003, 20 watts 20Hz-20kHz

Is this THD+N or THD ?

 

[drMordor]

Thd+n

 

[drMordor]

Thanks guys!

 

[cdsgames]

I am able to get 0.00012 at 10W , 8R 1Khz 20-20Khz THD+N

You did better than TI. Congrats.

 

[drMordor]

Show spectrum 3-9kHz?
I have a flat spectrum in full frequency 20-20
I added an integrator to the loopgain and smoothed out the peaks in the spectrum.

 

[drMordor]

If you add an active integrator to the gain loop, you can get even less distortion.

 

[drMordor]

I will use this in a GaN amplifier

 

[turion64]

This confirms that DrMordor modules are great and everyone seems to have the same opinion. The new one with integradted LLC PSU is one of my best Class D amp.

Thanks to DrMordor who made a very very good job !

Yes, I concur. Mine sounds fantastic. No need for any mods.

 

[cdsgames]

I am attaching the 1Khz 10W , 8R taken with AP (unweighted)


THD at 0.00012, THD+N 20 to 20Khz at 0.001 ( my mistake)




This result is taken with full buffer in front of inputs.

 

[drMordor]

Excellent measurements)))
I will repeat mine with a finer sound card setting
But even so I'm interested in your spectrum 3-9kHz

 

[cdsgames]

Yes its very good, I will get you the 6.67Khz FFT as well.


Meanwhile , I do not consider the THD+N as the only factor in SQ. In my personal opinion even noise on the output factors and I always try to minimize . (thats not something that most class d designers think about )


I am attaching the SA reading of the output .


And yes the inductor...for me that's very important in SQ. Simply I have designed my own with very low magnetic core.



I do not think that most of TPA3255 are done correctly including the one from other DR.
A well designed TPA3255 will be very close (or equal) to Purifi amps and equal (or better) than any GanFet I seen on the market. with the advantage to have a lot of protection



Yours looks the best in the field.

 

[daniboun]

Hi amigos,

new TPA3255 by BRZ with USB input :

and another one with BT QCC5125 with LDAC

 

[drMordor]

Hi! Ceramic input and output caps, garbage.

 

[daniboun]

Hi! Ceramic input and output caps, garbage.

Yo bro ! I confirm shame on those modules

 

[mamocel]

The last version 3e audio is very good with opa 1656,thanks Dany for the recommandation...sound very good and cheap for this level!!!

 

[zek]

The last version 3e audio is very good ...

Link please...

 

[mamocel]

this one ...TPA3255 amplificateur Audio 2x260W 2Ch classe D | AliExpress