Amp upgrade

[greatone99]

I have 4 gauge power and ground , for my current amp , down passenger side to rear wall , I would say 16 feet max . I’m switching to a audison 5.1k amp ,1650 watts
Is 4 gauge enough ? The amp is 75x2 250x2
1000x1 all at 2 ohms . The amp has a 100 amp fuse built in , so I assume it does not draw near that fuse rating .

 

[Shane361]

4 gauge, 2 gauge, 8 gauge, 0 gauge...What's right size power and ground wire for your amp? - Car Stereo Reviews & News + Tuning, Wiring, How to Guide's

What gauge wire you need? 4 gauge, 2 gauge, 8 gauge or 0 gauge? Learn how to determine the proper gauge wire for your amp installation.

carstereochick.com

 

[goblues38]

yes...you still are with in range of what 4 gauge can do.

the deciding factor is how reliable are those power specs.......how many amps will you really draw at 14 volts?

 

[The Car Stereo Company]

I have 4 gauge power and ground , for my current amp , down passenger side to rear wall , I would say 16 feet max . I’m switching to a audison 5.1k amp ,1650 watts
Is 4 gauge enough ? The amp is 75x2 250x2
1000x1 all at 2 ohms . The amp has a 100 amp fuse built in , so I assume it does not draw near that fuse rating .

i would upgrade. the relay rule also applies to wire. the smaller the wire, the more heat. heat is lost power. what size wire does the amp accept? that will be a good way to determine what gauge wire you need

 

[greatone99]

2 gauge

 

[greatone99]

I think if my math is correct 1600 divided by 0.75 , divided by 13.8 is 154 amps .

 

[The Car Stereo Company]

i think its watts ÷ volts gives you amps. which would be about 118 amps

 

[Hush Car Audio]

4 gauge is about at that limit where you might want to consider a large line. For such a small cost I would just upgrade it.

 

[greatone99]

yea I kinda figured .I might use the 4 gauge now then change it out in the spring .

 

[2022 Ruth]

What matters as much as gauge is the length of your run. If you are going to the back of the cab from the battery then you could probably get away with the 4 gauge. That amp has 2 gauge terminals and has a class AB a class A and a class D circuit in it so a lot going on. Amp has a 100 amp fuse so it is going to bump right up against what the 4 gauge of, say 17 feet, can handle. Of course the larger the gauge the better. 4 gauge would probably be fine unless you are running it at max volume for a long time. Remember high power class AB amps in the 90s all had little dinky 12 gauge wires coming out of them. I do think people get a little overkill any more as every one speaks in terms of 100% load 100% of the time.

Wire is easy enough to switch out if you dont mind the work/expense for piece of mind - if that is important to you . If it was mine, Id just use the 4 gauge. Not like you are running 10 gauge to a 5,000 watt amp that requires dual 1/0 gauge.