Question for Voltage On Amplifier

[rentner]

I came over a Circuit, I am pretty interested in, that says, that it cannot handle over 90V.
It is the following link.
http://hobbyelectronicsdri.blogspot.de/2011/06/600-watt-quasi-amplifier-with-mosfet.html


I see no reason, why anything over 90V can destroy parts, if capacitors are choosen correct. I want to make a few Changes on that circuit, to get an RMS Power of 1kW into 8 Ohms load. But 1kW into 8 Ohms means VRMS=90 -> Vpk=127 and additional it is good to have a few extra volts, to lower distortion. So I want to put 135VDC+/- to the Amplifier. Well, I am affrait, that it might not handle that Voltage, because the Circuit says, it only works for 90VDC+/-

Do I have to change anything else than the output mosfets and Capacitors? (Yeah, I want to change them to another type, which won't be a problem)

Thanks for Reply!

[Psi]

I cant see anywhere that he specifically says it wont work over 90V.
All i can see is the voltage range on the schematic 60-90V.

It's likely that's just the range it was designed it for.

Make sure you use mosfets that can handle both the peak current and the heat generated.

Also, depending on your new mosfet specs, you may have to adjust the 0.33R source resistors a little to keep the fets balanced.

[rentner]

So I hope, it will work for that Voltage...


What the hell do I need that crap for? Well...
I want to make a HiFi 7.1 reciever with 100WRMS max for each channel at 8 Ohms and 1kW into 8 Ohms for the sub. This will be definitely enough for me. The fun will be a Regulated Power Supply with 35V 1kW for the surround and 1.5kW +135V +10V / -135V. . When I start and make progress I definitely will post something on that in that Forum. I promise.
Hope I get that done under 300€. Good, that I already have a few parts.

It will, by the way, be a 100% analog Reciever.