200W @8 ohms circuit

palesha · 27th January 2006, 03:11 PM

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, 03:51 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, 10:05 PM

For the 200W@8Ohms amplifier have a look at the Ampslab C300:
http://www.ampslab.com/c300.htm

AndrewT · 28th January 2006, 11:29 AM

Hi,
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; http://sound.westhost.com/projects.htm

27th January 2006, 03:11 PM	#1
palesha diyAudio Member Join Date: Nov 2001 Location: Pune India	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.

27th January 2006, 03:51 PM	#2
lineup diyAudio Member Join Date: Dec 2005 Location: the north	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 __________________ lineup

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27th January 2006, 10:05 PM	#3
CornelisJ diyAudio Member Join Date: Oct 2004	For the 200W@8Ohms amplifier have a look at the Ampslab C300: http://www.ampslab.com/c300.htm

28th January 2006, 11:29 AM	#4
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, 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; http://sound.westhost.com/projects.htm