2x30V,225VA toroid in stock... what amp?

[child1]

Hi all!

I have a toroid (225VA,2x30V) in stock, and I want to build an subwoofer amplifier, but all the chipamps i can find is not able to withstand +/- 42(43)V supply....

Any thoughts on which amp i could build that could use this x-former?


Grats!

Mads, Denmark

[Mooly]

LM3886 (at its safe limit really) and the TDA 7293 come to mind. Its a high rail voltage though and lower is often better for reliability. Your better getting a more suitable transformer tbh

[aadrian]

You can also use TDA7294 without any problems

[Mooly]

The TDA 7294 is a rated 100 volts max under no signal conditions. For an 8 ohm load the data sheet specifies 80 volts total as an absolute maximum.

[JMFahey]

Go discrete for reliable 150W/4r or thereabouts.
An LM3886 won't cut it, and the TDA7294 is *just* on the edge, for an 8 ohms load.
I'm not a fan *at all* of parallel chipamps.
A subwoofer amp is an "easy" one.
Who needs 0.0001% distortion/high slew rate/500 KHz bandwith/class A/whatever there?
Any simple raw power amp will do.
Tons of projects, even here at DIY.

[Tekko]

TDA7293 parallel will work with this transformer.

[JMFahey]

The point of life is to build atleast one audio amplifier before you die.

Then I should have died 10000 times by now