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palesha 27th January 2006 04:11 PM

200W @8 ohms circuit
I want to make one 200W @ 8ohms Class AB for 2 way active PA speaker system. I want to use another 50W@8ohms for tweeter. The amplifier must be rugged. Suggest some good circuits.

lineup 27th January 2006 04:51 PM

200 Watt in 8 Ohm = +-56.6 Volt peak
(gives >7A peak currents, 56.6V/8 Ohm)

For one channel, mono:
Power Supply = 2x 60-65 Volt DC with 15-20 Ampere bridge rectifier.

Suitable transformers, you need two of these, can be: 2x45V and 500VA

CornelisJ 27th January 2006 11:05 PM

For the 200W@8Ohms amplifier have a look at the Ampslab C300:

AndrewT 28th January 2006 12:29 PM

I would go for the ESP 300W design and reduce the transformer voltage to match your power requirement.
I think it's P101 you need not the sub-bass amp;

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