Two 10s and a 12 off one amp??

[Koverbover]

As everyone else has already mentioned, if you properly port the 2 10s, you will probably be quite happy. My first system was 2 10" rockford punch or power, can't remember. 4 or 500rms each in a custom ported box and they would blur your vision in a trunk car with seats that don't fold down

 

[Koverbover]

I might port the 10s, but I like the sound from sealed boxes better for the music I listen to. I'd have to do way more research on how to properly port a sub as well lol. Tried my best on this box, but it's my first one.

 

[Koverbover]

I misread that. I thought they were 500w each.
If you're dead set on wanting to use 3 subs:

1000w is 1000w whether its from one amp or two. There's no risk to your alternator or any electrical, as long as you use cable that is "at least big enough".

Your alternator recharges the battery. If you draw more than it can recharge, then you're just going to watch your voltage gauge slowly drop, until it eventually kills the battery (which will take a while). All you have to do is turn the volume down. If you set it up as two amps, you just pull the fuse out of probably the 12" until you upgrade the alt.

WHAT I WOULD DO: Go ahead and set up both amps. Run it, see how it effects your electrical, and then disconnect the 12" and see how much of a difference it makes. THEN REEVALUATE whether or not a 3rd sub and an upgraded alt is worth it. You might barely notice the bump, and it's about 40 amps, which on a stock alt with where this is going, might be the difference in needing a new alt or not. Price out the alts, see if it's worth it. If you built the box, maybe you have spare wood, and want to try a different design with two, or maybe you can modify that one to add ports.

I

I misread that. I thought they were 500w each.
If you're dead set on wanting to use 3 subs:

1000w is 1000w whether its from one amp or two. There's no risk to your alternator or any electrical, as long as you use cable that is "at least big enough".

Your alternator recharges the battery. If you draw more than it can recharge, then you're just going to watch your voltage gauge slowly drop, until it eventually kills the battery (which will take a while). All you have to do is turn the volume down. If you set it up as two amps, you just pull the fuse out of probably the 12" until you upgrade the alt.

WHAT I WOULD DO: Go ahead and set up both amps. Run it, see how it effects your electrical, and then disconnect the 12" and see how much of a difference it makes. THEN REEVALUATE whether or not a 3rd sub and an upgraded alt is worth it. You might barely notice the bump, and it's about 40 amps, which on a stock alt with where this is going, might be the difference in needing a new alt or not. Price out the alts, see if it's worth it. If you built the box, maybe you have spare wood, and want to try a different design with two, or maybe you can modify that one to add ports.

I

Good explanation, thanks. I'll try installing that other amp soon.
I have a stinger cap that shows my volts. It's reading 15v at max volume with the 12" running through channels 3/4 of my 4 channel, bridged (the 12s nearly scrapped, there's a metallic rattle) at half gain probably getting 200w rms Topps. It still pushes good air though. I'll need a new one. Where can I go to look for good deals? I live in Canada and most things are overpriced af. Thanks buddy, I appreciate it.