Infineon MA12070 Class D

[theAnonymous1]

Did a discharge capacity test on the battery. It still had 2.3Ah (38% capacity) left. I find that pretty impressive and way better than I expected.

 

[Radian]

Yes very impressive.
At the moment I power mine with latest generation 4ah 20v Tool Battery for testing purposes. Very convenient to recharge and swap out. Only minor audible difference to linear supply.

 

[domician]

The car battery for a month with 6-7 hours of daily listening subsides to 12.5V. Configuration 2.1.

 

[Radian]

My unit does not work below 14v.
What brand do you use?

 

[domician]

My unit does not work below 14v.
What brand do you use?

Modified https://www.aliexpress.com/item/1005003472910959.html

 

[douede]

@ domician: IMHO, low quality; bad solder joints...

 

[domician]

douede, I bought back in 2021 from another seller, everything is fine with the quality.

 

[Solve]

@ domician: IMHO, low quality; bad solder joints...
View attachment 1222336

Strange, that bridge going to pin 31.

 

[gnat_leader]

Nice find. Double MA12070.
Would you post a pic of the internals once you get it?

https://www.diyaudio.com/community/...mp-to-get-from-aliexpress.379676/post-7480882

 

[Radian]

Thanks

 

[Solve]

Thanks

Sorry I forgot that and have not opened it.
It sounds good, pretty much the same as Topping Pa3s.
But I know there was some discussion about uneven volume pot with Topping.
But an A-B test confirm that it's not even with Topping but O-Noorus it's right with full volume.

Anyway I got back to TPA3255 with the new 3e audio boards.
Sounds very good!
Same, better, 3D sound as MA12070.
BUT I use the O-Noorus at HF in my two-way active.
Very good combination!Never had better sound!

 

[gnat_leader]

I had several TPA3255 and prefer MA12070.

which what speakers do you prefer the MA?

 

[Solve]

which what speakers do you prefer the MA?

Anything that sounds good...

 

[gnat_leader]

Anything that sounds good...

ah interesting, I thought you were going to say anything that's not low sensitivity.

 

[Solve]

Then you knowed the answer your self.

 

[gnat_leader]

Then you knowed the answer your self.

Well I was hoping you'd provide details - like what db/1w rated speakers you're using - to get a better understanding of the amp's ability/sound-quality.

 

[Solve]

My Purifi have 88.7dB and it's just to little for MA12070 I just heard when I bought the new TPA3255.
So maybe 90dB could be a good start.

 

[gnat_leader]

So maybe 90dB could be a good start.

thanks for the info. Yeah, not a problem for me as the two speakers I have are 93db and 96db.

 

[ValoWaking]

there is some new board with inbuild MCU

https://www.aliexpress.com/item/100...5481ed962!12000035374345665!rec!UA!141635678!

 

[Radian]

Solve, was that you?