Wife didn't like car batteries under the sofa. She's little grumpy.
/Inge

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of John Burke
Sent: den 20 september 2007 00:10
To: [log in to unmask]
Subject: Re: [TN] NTC:subwoofer


Actually Inge, any bigger than that you might want to start using car
batteries instead of caps...............8-)

 
 
John Burke
 
(408) 515 4992

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Hfjord
Sent: Wednesday, September 19, 2007 1:57 PM
To: [log in to unmask]
Subject: [TN] NTC:subwoofer

Audio techies,
I've built a subwoofer with a 15" 400 Watt loadspeaker (4 Ohms). Bought
a 200 Watt low frequency 12 V amplifier. For that one, I built a 12 VDC
power supply with 15 A toroid, regulator, OP amplifier and a backup
consisting of totally 100,000 uF on the output. What is your experience?
Will these caps be enough to take the short power tops in Space War or
the enormous sound effects in Matrix or Jurassic Park? Any thumb rules
or maths?
/Inge

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