You pick up the phone, dial the companies customer support line, and ask them what fuse rating for that amp. Then you ask the fuse rating for the other amp. Then add the two together and buy the fuse closest to what they tell you.

Seems easy to me.

Civic Guy, while your method is based on electrical theory its not 100% reliable. It is a good rule of thumb but not 100%.
I didn't miss the point of what you were saying. I know that a lot of people don't want to spend the money on a fuse block plus additional fuses, so they use the inline fuse to protect their amplifers. I just didn't agree with your method of calculating power consumption. I don't agree with your method because it can be way off (see below).

The example I gave earlier about the 10,000 watt amplifer, the actual draw of that MTX amplifer is only around 400 Amps, but using your method I get 724 Amps which is way off.

Corvette Crazy, I agree with you. I would call the manufactuer of the amplifers and find out the specs. Just because they don't list them online doesn't mean that they don't still have them on record.

Dutch

Ok gang, I got what I wanted, and then some. I'll just get ahold of Rockford and talk to them.

Oh and by the way, I am using 4 gauge power wire.


Thanks again,

Tim

I'm just curious, that MTX amp, is that 10,000 watts peak or RMS? I'm running a Rockford Fosgate 2400 watt amp but thats peak output when bridged. But the RMS output is 400 watts at each of the two channels. Rockford recommends a 60 amp fuse and if you do the math it comes out to be 57.97 amps. And since you can't by a 58 amp fuse, the next best choice is 60 amps.

And yes can call up the manufactuer and get the specs. Sometimes they even list the the specs on the back of the amp. There are many ways to figure out current draw and my way was one of them. I'm not saying your way or any other way was wrong but some are easier then others.

Matt

I agree with your last post Civicguy

As far as that MTX amp I think it was RMS it was for competition use. It had 4 x 100 Amp fuses in the side.
To this day It is still the biggest dirtiest amp I've ever seen and heard in person. It was frigin insane like 5 x 2 feet in size and drowned out every other noise in the store. I was yelling at the top of my lungs to the sales guy standing next to me to turn it off and it sounded like I was wispering.
It looked like the old PG (Phoenix Gold) Outlaw amps that used to come in the huge wooden crates.
Though the Outlaws were way less power, but similar size to the MTX I was refering to.

Here is a pic of one of the Outlaws for anyone who is interested just to get an idea of size (top pic, the amp on the right)
http://www.phoenixgold.com/webfaq/M_Special.htm

Dutch

Do you know the best location to tap my remote wire from my amp into to power on and off my amp.. because currently I still have my Factory Radio...and didnt want to mess with pulling all that out...

Thanks

ha ya guys are funny.gettin to technical some times lol not saying anything though lol. both ended up bein on the same page for the most part anyways. as a guy who dont have any profesional experiance ive always added up the fuse ratings of the amp/amps and went from there. i suck at math but can add and has never failed on me yet remote wire can be hooked up to a togggle switch of some kind, just hook it up to 12v source, not sure what off the top though. in where the fuses are? might be a spot with no fuses but still has 12 power. check around with a DMM or test light.

JCM if you have a power antenna and your amp is in the trunck that would be the cleanest and shortest way to run your remote wire and alot of times GM ran a wire back to the antenna regardless if it had the power one or not