Dual Batts

[EL-ORIGINAL 10+ year member]

Do i need a battery isolater when running a regular sarting batt and a dedicated audio batt

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[audiolife 5,000+ posts]

depends sometimes you do sometimes a relay is just needed and sometimes just parallel wiring can be used depends on the mix

 

[EL-ORIGINAL 10+ year member]

when would i need one?

 

[audiolife 5,000+ posts]

if the restences between the 2 batteries are not close to the same

 

[EL-ORIGINAL 10+ year member]

yellow up front yellow in the back would i need one?

 

[audiolife 5,000+ posts]

chargem both up you should be straight id still get a relay though about 40 bucks

 

[knukonceptz 10+ year member]

You need nothing but the batteries, isolators are not good for audio use while car is on. If you want extended play from your stereo with car off and not worry about draining your front battery - then you want an isolator. But the added reserve of the second battery negates some of this anyway - so there is no real benefit

Just wire them in parallel and you'll be fine

See this thread:

http://forums.caraudio.com/vb/showthread.php?t=139935