alltattooed

Hey all,

I am adding a second amp to system to power my front speakers.

I currently have a Rockford amp running 150w at 4 ohms. This is fed by a 1 farad Rockford capacitor.

And i have a 40 amp fuse on the power line at the battery as per what the Rockford amp requires.

I am adding a second amp i will be running 2 channels at120watt at 2 ohms each . It is rated at 60amp for the fuse.

I would like to run this amp througt the same Rockford capacitor.

Since i will have both amps connected to 1 capacitor i will only run 1 power wire to the capacitor from the battery.

I plan on upgrading my wiring to handle the power load. that is not an issue.

My question is what size of a fuse will i put on the power line between the battery and Cap.

1 amp requires a 40 amp
1 amp requires a 60 amp

2nd since this amp will only be for the speakers, i will it even be of any benifit to connect it to the Cap?

Thanks Guys

mxyx

Generally you would add up the fuses of your amps (40 + 60) and use a large enough main power wire to support the current. In this case I would go with at least 4-gauge and use a 120-125 amp fuse. Remember, you would only have the potential to support 125 amps max, you won't be running anywhere near that much power unless you're maxing out the volume and gains 24/7. Even then, factors like amp efficiency and resistance come into play as well, not to mention the fact your stock alternator only puts out so much.

Some good reading here: http://www.bcae1.com/fuses.htm and http://www.bcae1.com/wire.htm

tanakasan

One 4ga run will definitely do it!

Remember the fuse at the battery protects the WIRE from a dead short and fire! The fuses at the amp protects the amps.

I have a Nine.2 (49A max current draw) and a Nine.2x (85A max current draw) on a single 4ga with a 100A fuse. Not running subs with them, but never blown the fuse.

mxyx hit it on the head! Good info.

Robert

alltattooed

Thanks guys.

That helps quite a bit.