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September 2007

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Subject:
From:
John Burke <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, John Burke <[log in to unmask]>
Date:
Wed, 19 Sep 2007 15:08:23 -0700
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text/plain
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Can only recommend not standingin front of it when you power it on or off.

John

 
 
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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