Gainclone with battery vs. A/C power

chuck55 · 2nd May 2007, 03:55 PM

Are there any benefits in a 3875 G-C to go with battery power instead of the A/C from the wall?
How many 12VDC batteries do I need?
Thanks

AndrewT · 2nd May 2007, 04:23 PM

Hi,
what is your proposed load?
What is your target power output? Maximum and average?

! · 3rd May 2007, 12:59 AM

No, use batteries only if you need it portable. A general comparison to what most people use for AC-DC would entail about 4 x 12V batteries (as 24-0-24) of over a dozen amps each else you could only listen for a short time before wearing down the plates and having the continual burden of frequent recharging (and added cost of the charger).

chuck55 · 3rd May 2007, 05:51 PM

I don't have a scope to measure power consumption. The speakers are 3 & 4" single driver 80-88dB efficient with 8 ohm load.
The 88 dB runs fine on my 22wpc Denon minisystem. Volume is set to 20 out of 34 max.

! · 3rd May 2007, 06:55 PM

When I wrote a dozen amps each above I'd mistyped, meant Ah, amper hours battery capacity.

AndrewT · 3rd May 2007, 11:54 PM

Quote:

Originally posted by chuck55
I don't have a scope to measure power consumption. The speakers are 3 & 4" single driver 80-88dB efficient with 8 ohm load.
The 88 dB runs fine on my 22wpc Denon minisystem. Volume is set to 20 out of 34 max.

Hi,
if 88db/W and 22W get on as partners then 80 db/W will need 160W or thereabouts to match the volume.

Both these are beyond what would be sensible for battery powered.

1 or 2W and 96db/W would better suit battery power and only if set up to require very low quiescent current.

2nd May 2007, 03:55 PM	#1
chuck55 diyAudio Member Join Date: Dec 2003 Location: New England	Gainclone with battery vs. A/C power Are there any benefits in a 3875 G-C to go with battery power instead of the A/C from the wall? How many 12VDC batteries do I need? Thanks

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2nd May 2007, 04:23 PM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, what is your proposed load? What is your target power output? Maximum and average?

3rd May 2007, 12:59 AM	#3
! diyAudio Member Join Date: Jun 2005 Location: Midwest	No, use batteries only if you need it portable. A general comparison to what most people use for AC-DC would entail about 4 x 12V batteries (as 24-0-24) of over a dozen amps each else you could only listen for a short time before wearing down the plates and having the continual burden of frequent recharging (and added cost of the charger).

3rd May 2007, 05:51 PM	#4
chuck55 diyAudio Member Join Date: Dec 2003 Location: New England	I don't have a scope to measure power consumption. The speakers are 3 & 4" single driver 80-88dB efficient with 8 ohm load. The 88 dB runs fine on my 22wpc Denon minisystem. Volume is set to 20 out of 34 max.

3rd May 2007, 06:55 PM	#5
! diyAudio Member Join Date: Jun 2005 Location: Midwest	When I wrote a dozen amps each above I'd mistyped, meant Ah, amper hours battery capacity.