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Old 09-25-2004, 10:55 AM   #1
Will98RS
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Default turn on gauge for two amps

quick question. for two amps (500bd and 500x both from rockford fosgate) what gauge turn on lead do i need? right now i have a really tiny one designed for one amp. do i need to take out the HU to run a thicker gauge?

thanks
will
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Old 09-25-2004, 11:03 AM   #2
Mulder
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Don't worry. The amount of current used for turn-on is very low, on the order of a few milliamps. Whatever wire you have now is fine. If you really want to be sure you're not exceeding any ratings, there should be an indication in the specs for each amp for what the turn-on circuit current is, and in the HU specs for the max current that can be drawn from its turn-on output. Most HUs have more than enough current available for two or more amps.
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Old 09-25-2004, 02:19 PM   #3
Will98RS
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thanks, i didnt even think about the HU current, i was thinking about the current capacity of the wire
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Old 09-25-2004, 05:49 PM   #4
the suicidal eggroll
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even if you had 20 gauge it would be fine, what you have to worry about with multiple amps is the headunit's ability to supply enough current. Most headunits don't have a problem with 2-3 devices, but more than that and you should really get a relay.
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Old 09-26-2004, 03:57 PM   #5
V6TurboTA
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I am impressed. I think this is the first thread on NASIOC I have read with ALL good info... granted theres only 2 reply's.. but they are both pretty much spot on. Bravo!!!

~v6
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Old 09-26-2004, 09:03 PM   #6
tdxflex
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The largest amp turn-on wire recommended gauge I've seen is 16ga, old Xtant 1001dx amp. I think most amp install kits use 18ga.
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Old 09-26-2004, 09:23 PM   #7
11SECWRX
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the best thing to do is use a relay after the headunit turn on wire if your are worried about current.
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Old 09-26-2004, 09:42 PM   #8
Will98RS
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i saw a website that recomended the relay but if i can get away with splicing one wire for both amps that would be much much easier
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Old 09-27-2004, 12:56 AM   #9
locosti04
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you don't need a relay... splice the 1 wire and send it to the other amp. if you are using more than 2 amplifiers then it might not be a bad idea to use a relay.
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Old 09-27-2004, 06:32 PM   #10
Will98RS
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i got it set up, thanks guys...i would consider using a relay except my power line are all pretty now and i dont want to mess with that
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