Mini-A Power question

chipco3434 · 9th December 2005, 01:42 PM

Would a 400VA (2x12V@200VA) run four channels of Mini-A?
Power supplies are 2x66,000uF CRC.

MikeW · 9th December 2005, 02:08 PM

It depends on the bias you want to run.

chipco3434 · 9th December 2005, 02:22 PM

er ah... standard...

I am using the Brian GT board and did not plan on upping the bias. I am not sure what the "standard" bias resistor was in the kit, but that's what I'm running.

I am planning on running this as a bi-amp four channel. I guess I could give something up to lower the bias on the HF amp if it was important.. close???

Or should I just buy another tranny?

MikeW · 9th December 2005, 06:48 PM

If you bias them at 1.5 amps with 14.5 volt rails it will be about 44 watts per channel. A 400VA or 2-200VA should do it.

Wuffwaff (William) has an Aleph power spreadsheet on this forum somewhere.

chipco3434 · 9th December 2005, 07:11 PM

Thanks... my feeling is that it's a little low... just approaching marginal. Sometimes you get clarity after you can sleep on it. I got the dough... I should just buy the second one (tranny) rather than kicking myself in the a$$ every *******' time I look at it for the next twenty years. Eh?

I will check wuffwaff's power calculator though. Thanks!

9th December 2005, 01:42 PM	#1
chipco3434 diyAudio Member Join Date: Feb 2004 Location: Racine, Wisconsin	Mini-A Power question Would a 400VA (2x12V@200VA) run four channels of Mini-A? Power supplies are 2x66,000uF CRC.

9th December 2005, 02:08 PM	#2
MikeW diyAudio Member Join Date: Sep 2002 Location: North of Boston	It depends on the bias you want to run. __________________ MikeW

9th December 2005, 06:48 PM	#4
MikeW diyAudio Member Join Date: Sep 2002 Location: North of Boston	If you bias them at 1.5 amps with 14.5 volt rails it will be about 44 watts per channel. A 400VA or 2-200VA should do it. Wuffwaff (William) has an Aleph power spreadsheet on this forum somewhere. __________________ MikeW

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9th December 2005, 02:22 PM	#3
chipco3434 diyAudio Member Join Date: Feb 2004 Location: Racine, Wisconsin	er ah... standard... I am using the Brian GT board and did not plan on upping the bias. I am not sure what the "standard" bias resistor was in the kit, but that's what I'm running. I am planning on running this as a bi-amp four channel. I guess I could give something up to lower the bias on the HF amp if it was important.. close??? Or should I just buy another tranny?

9th December 2005, 07:11 PM	#5
chipco3434 diyAudio Member Join Date: Feb 2004 Location: Racine, Wisconsin	Thanks... my feeling is that it's a little low... just approaching marginal. Sometimes you get clarity after you can sleep on it. I got the dough... I should just buy the second one (tranny) rather than kicking myself in the a$$ every *******' time I look at it for the next twenty years. Eh? I will check wuffwaff's power calculator though. Thanks!

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