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September 2007

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Subject:
From:
"Creswick, Steven" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Creswick, Steven
Date:
Thu, 20 Sep 2007 06:47:42 -0400
Content-Type:
text/plain
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text/plain (67 lines)
Inge,

She is probably afraid you will have too much 'energy'.



Sorry, could not resist.  Can not believe I beat Dewey to an 
opportunity ta-do-it

Steve

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Hernefjord Ingemar
Sent: Thursday, September 20, 2007 2:01 AM
To: [log in to unmask]
Subject: Re: [TN] NTC:subwoofer

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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