Audio amplifier

[lineup]

This is the reason you should always
8 Ohm non-inductive non-capacitance LOAD Resistor
when you produce your simulations, graphs and specifications.

Amplifier will plain and simple work much better and
you will get good results and specs in your design
if you avoid loudspeakers.

Should be told in user manual of amplifier:
'Loudspeakers are not recommended,
because this amplifier was created without.
Best performance you get from using our highgrade 8 Ohm LOAD Power Resistors.'

Original signature by lineup

When you can tell sound from FFT Analyse Graph ... go sell your loudspeakers

[Darksog]

ok well i decide to use irfp250 200V 0.073 OHM 33A
and drop voltage + - 70v... and 6 fets and i think this is 2 ohm stabel i gointo bridge this amp and speager is 4ohm...

[Darksog]

now its lockked i use irfp250 Because i get it those from junked electroniks i have now 29 x irfp250 =)

[quasi]

Hi Darksog,

Please look at the chart here http://www.diyaudio.com/forums/showt...32#post794932. With 70v rails and a 2 ohm load 6 x IRFP250 (3 per rail) will quickly die.

Cheers

[Darksog]

Hi quasi
do you mean that i should use 4 fets per rail or drop voltage?
thanks

[Workhorse]

You need at least 12 IRFP250 Fets to Play Safe.........

K a n w a r

[quasi]

Hi Darksog,

You can choose whether to drop the rails or increase the FETS. The chart I posted can guide you. The chart shows you that for this amp PCB, 70 volt rails and 2 ohms is not recommended. If you can make them fit, go by Kanwar's suggestion and use 12.

Cheers