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What is polarity? & help with hooking up mp3 player to car?!

I just bought a hookup for my car to play my mp3 player in it. it's a Philips CD-to-Cassette Adapter Kit. it's the kind that you plug into the cigarette lighter, because i don't have a tape player. on the hookup, it says you have to switch it to match the polarity number for your mp3 player. i have NO idea what this means, and i couldn't find it in the manual. I cannot get the hookup to play my mp3 player, and when i plug it into the mp3 player, it shuts off sometimes. i need help please ???


i'm using a creative zen mp3 player .

and here's a link for the cassette adapter:

http://www.walmart.com/catalog/product.do?product_id=7959086

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POLARITY MEANS +/- AND NOT TO REVERSE. FOR EXAMPLE ON A SERIES WIRING SPEAKER SYSTEM YOU REVERSE POLARITY EVERY OTHER SPEAKER SO THE OHM LOAD DOUBLES. OR ON ELECTRIC CARS SERIES WIRING DOUBLES VOLTAGE OUT PUT AFTER EACH BATTERY IS HOOKED UP.... BASICLY POLARITY IS POSITIVE ONE SIDE NEGATIVE THE OTHER MOST CASES YOU DONT WANT TO GET IT BACKWARDS POSITIVE TO NEGATIVE ONLY CONECT SAME+ TO OTHER + UN LESS YOU KNOW WHAT YOUR DOING. WHAT POLAITY HAS TO DO WITH AN MP3 ADAPTER I HAVE NO IDEA...WAIT... DOES IT CHARGE THE MP3 PLAYER??? DOES IT HAVE AN ADJUSTABLE VOLTAGE OUTPUT SWITCH?? THATY YOU PLUG IN TO MP3 PLAYER??

Posted on Feb 13, 2009

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