I have one sub amp already wired. The power goes through a hole in the firewall insulated with a rubber grommet. A previous owner probably installed it, since there was an amp already wired.

I want to add another amp for my mids and highs. I got it already, its a cheap legacy 300w peak amp. Im pretty sure 10 gauge is the largest gauge wire that will fit (largest as in widest, smallest number). I am feeding my 500w rms alpine amp with a 8 gauge wire right now. There is a fuse near the battery, 200a. Since I have such a high fuse, cant I split the power wire after the engine bay, somewhere in my interior? Or is that still dangerous? Also how should I physically split the power? A distribution block? Dont those usually support the same size wire? So I should get one for a 8 gauge and maybe fold the 10 gauge wire over on itself?

Im sure Im better off splitting the power in the engine bay, but if its safe to split it somewhere in the interior, past that hole in the firewall, I rather do that.

 

could fuse it right where you split off from the main wire in the interior and it would still safe in event of a short,~10a fuse should be plenty if just used for mids/highs.Current spikes drawn by the sub amp could modulate the output of the mid/highs amp if power drawn from same line though.

 

I thought it was best to fuse close to the battery? Or are you saying add two fuses where I split the power inside, and keep the one near the battery? Also how should I physically split the power? I have a 8 gauge power cable and a 10 gauge power cable. Where can I find a terminal strip or distribution block that will fit both?

I don't want the sub amp to affect the other amp by drawing from the same line. Is it better to run another power wire then? Also attached to the battery terminal? Or get a terminal post and attach the two wires there. I don't see the difference between the terminal post and splitting it though.

 

All you need is a distribution block, and split the power source. Do your amps have built in fuses?
I would do this.

Run 4 gauge from the battery (with a fuse no more than 6 or so inches away from the battery). to the distribution block. Then split the power wire to the size that is required for each amp.

So if your sub amps requires an 8 gauge, run 8 gauge to it. And if the other amp needs 10 gauge, run 10 for it from the distribution block.

Now if either of the amps don't have an internal fuse, than you should get a fused distribution block.

Here are some different types of blocks
http://www.knukonceptz.com/productMa...0Fuse%20Blocks

Chris