positive grounded car radio?

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=74903
Printed Date: May 24, 2025 at 1:29 AM

Topic: positive grounded car radio?

Posted By: ellis82
Subject: positive grounded car radio?
Date Posted: March 22, 2006 at 10:40 AM

Hello..

I bought a 94 Laguna last month, but it has no car radio in it. The battery is positive (+) grounded. Does this mean i have to buy a positive grounded radio or can i insert any radio? Or do i need a transformer or converter or something to stop the radio blowing up if i put a normal radio inside, because i have got a couple of radios but they all have a negative (-) sign next to the grounding on the information panel?

Any help much appreciated..

Replies:

Posted By: kgerry
Date Posted: March 22, 2006 at 12:49 PM

you should be able to get a polarity inverter to do what you want... i used a few back in the early eighties on postive ground buses..... another way would simply be to totally isolate the radio from the chassis, mount it in a wooden box or panel and do not hook up the antenna and it should work fine as well if you simply invert the power wiring....

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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer

Owner/Installer
Classic Car Audio
since 1979

Posted By: stevdart
Date Posted: March 22, 2006 at 6:34 PM

...and I suppose that car drives on the left side of the road, too!

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Posted By: xscash
Date Posted: March 22, 2006 at 8:17 PM

you could also isolate the radio from the chassis and connect it....but remember the ant will have to be a glass mt or it will back feed the positv into the radio ground.

Posted By: kirktcashalini
Date Posted: March 22, 2006 at 8:20 PM

friend of mine has a sprite with the pos ground system.. he reversed the coil, and a couple other things, BAMMM no more problems with aftermarket fuel pumps/alternators(generators) whatever. wierd euros... haha GL

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99 Blazer LT. Yellow Top. Big 3. Infinity Kappa Speakers All Around. Jensen CD/DVD flip out. 2 Infinity Kappa Perfect 12DVQs powered by a Alpine PDX600.1 (in one custom box, building a FG box)