RD Audio 3250 V2

[S Merlington]

This amp uses FDA24N40F's for the outputs with the driverboard that only has 2 ir21844's on it..


Is there a good replacement for the FDA24N40F's?

 

[Perry Babin]

Why do you want a sub when the originals are readily available?

 

[S Merlington]

I dont really wanna sub them ..

But the owner of the amp keeps clipping it or doing something wrong this will be the 3rd time i have to replace the outputs in the amp ..

Was just wondering if there was something better out there ..

I played the amp for a week in my truck with 0 problems then returned it to the owner and within 2 days he blows the outputs..

 

[Perry Babin]

Maybe you're missing something in the protection circuit that's preventing the amp from shutting down when it's abused. Have you been checking the small inductors that feed the protection circuit drive to the driver board?

I've found that it's difficult to pick subs for class D amps without thoroughly testing them. There are too many variables to be able to know which ones are important to reliable operation. This also applies to other classes of amps. Two examples...

The IRF540 works in Rockford class AB amps but the IRF540N are VERY likely to cause problems.

The IRF3710s produced years ago worked in the 4080 based amps but the ones that are currently available will not. The IRF3710Z has to be used to replace the older IRF3710 (non Z).