question

injunjoe · 16th July 2011, 01:02 AM

is it possible that you can power a 200 watts mosfet amplifier with a switching mode power supply even without battery?

wintermute · 01:28 AM

I assume you are asking because often switch mode power supplies are used in car audio applications running off a 12V battery. There is no reason a switch mode supply running off mains cannot be used to power a 200W amp provided the power supply is designed to provide the required voltage and current.

edit: not being experienced in such things I would add the caveat that noise might need to be considered and would probably be more or less of an issue depending on the PSRR of the particular amp.

Tony.

djk · 16th July 2011, 07:46 AM

pyramid 12v power supply | eBay

I recommend buying twice the number of watts the amplifier is rated at.

16th July 2011, 01:02 AM	#1
injunjoe diyAudio Member Join Date: Jul 2011	question is it possible that you can power a 200 watts mosfet amplifier with a switching mode power supply even without battery?

16th July 2011, 01:26 AM	#2
wintermute just another diyAudio Moderator Join Date: Aug 2003 Location: Sydney Blog Entries: 22	I assume you are asking because often switch mode power supplies are used in car audio applications running off a 12V battery. There is no reason a switch mode supply running off mains cannot be used to power a 200W amp provided the power supply is designed to provide the required voltage and current. edit: not being experienced in such things I would add the caveat that noise might need to be considered and would probably be more or less of an issue depending on the PSRR of the particular amp. Tony. __________________ Any intelligence I may appear to have is purely artificial! Some of my photos Last edited by wintermute; 16th July 2011 at 01:28 AM. Reason: add psrr comment

16th July 2011, 07:46 AM	#3
djk diyAudio Member Join Date: Feb 2001 Location: USA	pyramid 12v power supply \| eBay I recommend buying twice the number of watts the amplifier is rated at. __________________ Candidates for the Darwin Award should not read this author.

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