RF distribution block: wire size?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=61964
Printed Date: May 09, 2025 at 7:09 PM

Topic: RF distribution block: wire size?

Posted By: Jeffal
Subject: RF distribution block: wire size?
Date Posted: August 24, 2005 at 11:36 AM

Hey you guys,
Just picked up a rockford fosgate dual amp wiring kit (CP4DCKS), and it includes a fused distribution block, and it looks like it has one 4AWG input and two 8AWG outputs, because the two output terminals have a smaller diameter than the input, and I'm pretty sure that that's what the dude I bought it from at best buy said too. My problem is that one of my amps, infinity ref611a, recommends using a minimum 6AWG, so I was planning on running 4AWG all the way to it. I went to a few best buy's and circuit city's, and the consensus among most of them seems to be that if you use 8AWG from the D-block to the amp and keep it as short as possible, it shouldn't be a problem. What do you guys think? Also, what fuse sizes should I use on the D-block?

Replies:

Posted By: godblessdremil
Date Posted: August 24, 2005 at 12:39 PM

I agree if you keep it short it shouldn't be a problem.

Posted By: stevdart
Date Posted: August 25, 2005 at 12:58 AM

Yes, note the text under the gauge box. The longer runs result in some voltage drop, whereas the short run from the distro wouldn't.

posted_image

If the distro didn't come with fuses, you can use up to 100 amps for each 8 ga. wire, but at least match the total fuse rating of each amplifier.

BTW, notice some discrepencies in Infinity's wire gauge chart?

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Posted By: Jeffal
Date Posted: August 25, 2005 at 9:07 AM

stevdart thanks man, I think I understand what you mean. anywhwere between 100 and the total fuse rating of the amp should be safe. One more thing: I have 4AWG from the D-block to the battery terminal, so what would be a good fuse size for that one?