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<blockquote data-quote="smoka" data-source="post: 5708382" data-attributes="member: 606721">What size wire did you use for the big 3 and to connect the two batts. Did you run a seperate wire for both pos and neg?Has this been dimming since you first upgraded the audio or is it something thats grown worse over time?FYI the reason why your HU doesn&#039;t dim is because its probably digital (led) and will just turn off when the voltage gets too low. Same with your amps, they probably go into protect mode when the voltage drops too low.Your batteries should be fine for car audio, you just have to realize that they are not ment to be deep cycled so everytime you have to jumpstart your car it means less life out of your batts.It wouldn&#039;t hurt to check the batts. If one has a defect then both will have problems if you don&#039;t have an isolator. Try disconnecting them and let us know the voltage you read across the terminals. Also what voltage does your car idle at?</blockquote>

[QUOTE="smoka, post: 5708382, member: 606721"] What size wire did you use for the big 3 and to connect the two batts. Did you run a seperate wire for both pos and neg? Has this been dimming since you first upgraded the audio or is it something thats grown worse over time? FYI the reason why your HU doesn't dim is because its probably digital (led) and will just turn off when the voltage gets too low. Same with your amps, they probably go into protect mode when the voltage drops too low. Your batteries should be fine for car audio, you just have to realize that they are not ment to be deep cycled so everytime you have to jumpstart your car it means less life out of your batts. It wouldn't hurt to check the batts. If one has a defect then both will have problems if you don't have an isolator. Try disconnecting them and let us know the voltage you read across the terminals. Also what voltage does your car idle at? [/QUOTE]

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