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Expert: - 5/23/2009


Question
I have a 1990 honda accord and need to hook up a second battery and isolator to my audio equipment.  I have 2- 12" subs and a 1500 watt amp.  If you could help or send a link for a diagram that would be great.  Thank you

Answer
You are better off getting a new, high capacity battery and high output alternator.   But, you can buy isolators for $50 and up.  Go to google shopping and you will find many to choose from.

http://www.google.com/products?q=battery+isolator&hl=en

Here is a nice tutorial on installing and wiring isolators.

http://www.bcae1.com/battiso.htm

Most isolators have a wiring diagram that comes with them.  The purpose is to keep the charge currents from overloading the alternator.   When one battery it charged it switches over to the other battery.  

Let me know if there is more to the story.  

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Cleggsan

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Audio Design Engineer; systems, loudspeakers, cd/dvd players, etc. I am knowledgeable in all high end audio equipment and installations. MAKE SURE YOU GIVE A MAKE AND MODEL NUMBER AND CAR IF IT IS AN AUTO QUESTION. Note: I am getting some who ask good questions that take a lot of time to research but then the questioner fails to read the answer. Please don't ask questions unless you are seriously looking for an answer. If you find an answer to your question otherwise then let me know with your reply. Thank you.

Experience

Have been associated with audio design, standards, testing and component systems for over 40 years.

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Life Fellow Member of Audio Engineering Society Life Senior Member of Institute of Electronic and Electrical Engineers

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Review technical manuscripts for IEEE Spectrum Write occasionally for high-end audio publications

Education/Credentials
BSEE/MSCS/MBA

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Past Employee/advisor to several well known audio products manufacturers

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