8 x TDA7293(HS) PARALLEL DIY

[Kay Pirinha]

Sorry, I have to stand corrected, as the TDA7293 datsheet by ST really doesn't show an application for two chips in BTL .
Hence, PBTL in this case would demand for a phase inverter that drives two identical setups of four paralleled chips, i.e. two virtually individual power amplifiers with the same characteristics. Sorry, I don't get the issues you mentioned for such a configuration?
Best regards!

 

[chermann]

Thanks Kay for your explanation. i just starting with chip amps...


chris

 

[AmokRun]

Hi
Congratulations to this build

real TDA - moster
would be interesting how you handled the parts for each TDA chip + the "correction" for paralleling..... i guess its under the pcb?


chris

Here some closer pictures from the pcb. Hope they give you some information about leg connection.

 

[blai]

Congratulations on an incredible build.

And I bet yours is the largest TDA729x related power supply on the PLANET.

Which definitely must contribute to smooth and solid sound.

Better than other, very expensive amps?
I can agree with that.
Famous Tech Enzo often says: "the amplifier? ... it´s that thingie between the supply and the speaker"

Since the amp is the "faucet" between supply and speaker, having a HUGE "water tank" and HUGE "faucet and pipes" will definitely help to get smoooth clear sound.

Congratulations again.

Only problem I have is ith the 400W into 8 ohm rating, it does not work that way since peak to peak voltage stays the same, whether you use 1, 8, or 64 chipamps in parallel.

But again, the build is IMPRESSIVE.

Guys... Here is my tda7293 5x parallel pcb. I ll use one each side. Creator gives 410 watt real power at 4ohm. So you can't reach 400w with 4x at 8ohms. It's Maths.
Can you suggest me if I should use a preamp or add only balanced input pcb to use as power Amp?

 

[blai]

Some more pics!

 

[Kay Pirinha]

I'd not expect to get 410 watts of »real« power into 4 ohms even out of five chips. The reason has yet been detailled in this thread.
Best regards!

 

[danielwritesbac2]

...When i play my aelite 3 looks like the speaker will come in my face and smash me on the wall....

I was very surprised when my parallel TDA79293 came to life, my chair got blown over straightway, and then I knew I had too many watts.
The audio was beautiful, but it was too big for indoors.