what size fuse and wire
what size fuse and wire i currently have a 760w sony amp with a 60amp fuse right off my battery, i just a bought a 900w rockford amp that i am goint to add...what size fuse do i need running off the battery to be able to connect both amps with a total of 1660watts??my other question is can i use 4gauge power cable, then split it and run 8 gauge to my amps??
Ok, Im going to make ALOT of assumptions because I dont know the full details on your amps (Class A/D, peak power vs average power, etc).
I am going to assume that those amp ratings are peak for both amps, and Im going to assume they are both Class A amplifiers, so if they are not, ignore this, post back and I will redo this for ya.
I would place a 100 amp fuse straight off the battery with 4 gauge wire, and then run that all the way back to the amps. From there I would break off into 6 gauge wires, and put a 40 amp fuse on the wire going to the Sony and a 45 amp fuse on the wire going to the Rockford; however, if the amps themselves have different fuses on the actual amp, then use that exact same size instead of those I suggested.
Example: I said use a 45 amp fuse on the Rockford wire...if your Rockford amp has 2 25 amp fuses on the actual amp, then use a 50 on the 8 gauge wire instead of my suggested 45.
Let us know if you have any more questions.
Also! Make sure you dont exceed the fuse sizes of the manufacturer's specs.
I am going to assume that those amp ratings are peak for both amps, and Im going to assume they are both Class A amplifiers, so if they are not, ignore this, post back and I will redo this for ya.
I would place a 100 amp fuse straight off the battery with 4 gauge wire, and then run that all the way back to the amps. From there I would break off into 6 gauge wires, and put a 40 amp fuse on the wire going to the Sony and a 45 amp fuse on the wire going to the Rockford; however, if the amps themselves have different fuses on the actual amp, then use that exact same size instead of those I suggested.
Example: I said use a 45 amp fuse on the Rockford wire...if your Rockford amp has 2 25 amp fuses on the actual amp, then use a 50 on the 8 gauge wire instead of my suggested 45.
Let us know if you have any more questions.
Also! Make sure you dont exceed the fuse sizes of the manufacturer's specs.
Last edited by SidewayzOZ; Feb 5, 2004 at 09:20 PM. Reason: comment at end
Well I assume both those numbers are peak seeing as Sony and Rockford make some pretty outrages power claims. So lets say your Rockford amp is making 450 watts and your Sony is making 375 you have a total power of your system is 825 watts. I assume you are already running 4 gauge wire for your Sony amp. So change out your old 60 amp fuse with a 80 amp fuse. And see how it runs. If you notice your amps running extremely hot or shutting off you will probably need to upgrade to 2 gauge wire. I dont believe in fused distribution blocks for a system of your level of power. Just use a regular 4 gauge in 8 gauge out distribution block and use some 8 gauge wire but try to keep the 8 gauge wire runs under 10 feet.
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I would agree with Madboost, except another option than going to a 2 gauge wire would be to put a Stiffining cap close to your amps. That will also help with not killing your Alternator.
Just my opinion.
Just my opinion.
the sony has a 40amp fuse built in and the rockford has a 30amp fuse built in...doesnt make sense with the rockford having more total power, but at the same time the sony has a higher rms rating...hmm...any input??
Originally Posted by PewterNHRA2001
the sony has a 40amp fuse built in and the rockford has a 30amp fuse built in...doesnt make sense with the rockford having more total power, but at the same time the sony has a higher rms rating...hmm...any input??
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