RE: Car amps in the house

["Kevin Hawkins" <lists@xxxxxxx>]

You just need a 12V stabilised power supply - however the current drawn can be quite significant as the voltage is low,

 

current = watts / volts and you should probably cater for 50% efficiency so....

 

Taking a 24W per channel amp you get .....    

 

current =( (24 x 2) / 12 ) x 2 (50%) = 8 amps

 

 This is gonna be well beyond a wall wart and the stabilisation and smoothing on the wall warts would be questionable anyway causing hum and distortion. Decent 12V regulated power supplies are not very expensive anyway - and always useful.

 

To get down to the 1A or so that a meaty wall wart might supply you would only have 3 watts per channel.

 

Kevin

 

 -----Original Message-----
From: TAWN Jonathan [mailto:jonathan.tawn@xxxxxxx]
Sent: 22 August 2002 11:36
To: 'ukha_d@xxxxxxx'
Subject: RE: [ukha_d] Car amps in the house

AFAIK, you need a psu that will need to cope with a fair few watts (but I doubt you’ll be running some 6x9’s and a couple of 12” subs .. he he he)… a wall-wart wont cope with the current (IMO) ..

 

Perhaps something on the lines of the PSU’s that are found in such a shop as maplins for powering cb radio’s etc ???

 

Hope this helps somewhat

 

Jonathan

 

-----Original Message-----
From: Kenneth Watt [mailto:kennwatt@xxxxxxx]
Sent: 22 August 2002 11:33
To: ukha_d@xxxxxxxSubject: [ukha_d] Car amps in the house

 

What type of PSU do I need to run car amps in the house? Can you use a
standard wall-wart?

The plan being to use these for TTS and on a SliMP3.

K.

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