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Convert 12 volts to4.5/9 volts

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=39026
Printed Date: July 18, 2025 at 5:13 AM


Topic: Convert 12 volts to4.5/9 volts

Posted By: j9_ls1
Subject: Convert 12 volts to4.5/9 volts
Date Posted: September 12, 2004 at 1:32 PM

I am working on a project where I have a 12volt sealed battery, I am trying to run a portable cd player (4.5v) and a set of speakers (9v) off of this small battery.  Do you all know of a good way to do this?  I have noticed that I could just buy some universal adapters, and they should work ok, but I wanted to see your opinions.  Also, what would be a good way to charge this battery?




Replies:

Posted By: Wiseguy
Date Posted: September 12, 2004 at 2:28 PM
if you have the money u might wanna get your hands on a vicor dc/dc convertor https://www.vicorpower.com im using one in my car to make 40 volts from 12 volt to power a preamp, they are pricey tho



Posted By: Wiseguy
Date Posted: September 12, 2004 at 2:31 PM
other than that there is always those universal adapters  that u just plug into your cigarette lighter



Posted By: jeffchilcott
Date Posted: September 12, 2004 at 3:53 PM
or just buy speakers for $20 to $40 that run off 12 volt and a $100 deck for the car if money is a issue

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