Box help! Box/Port Volume and etc. Please help! (Advice)

[FeelDaBass]

i spy with my little eye the forming of a double post lol

http://www.stevemead...erent-ohm-subs/

so not only ru gonna do what pretty much everyone says not 2 do

but your going 2 build a box for them?

rofl why dont u take that box building money and get your expensive rockfords correct?

u keep asking what could happen...... FIRE (thats a good enough reason imo)

goodluck either way!

This one was originally before the other post, as I was full on with the idea in this post before I found out, but thanks for the luck.

[FeelDaBass]

The subs will not receive the same amount of power.

If you series the coils on each sub, and then parallel the two subs (I assume that is the plan for a 2.7 ohm load), and the amp makes 1200 watts, the d4 sub will get 400 watts, while the d2 sub gets 800.

Does not mater how you wire them unless you only run one coil on the d4, but that cuts the power handling in half.

Was originally thinking about wiring each in parallel and then series (1 ohm series with 2 ohm) to get 3 ohms, but I like that more.. If only it would work.

Just thought about this, how do systems with 30 subs in them wire theirs? They don't have that many amps so there would have to be parallel wiring and series wiring which would make some subs receive more/less power? Does that make sense? Or how do they do it?

[Torres]

no, because the coil configurations on the subs are all the same, thus all ending with the same configuration after all the wiring. one does not start out at a lower or higher configuration than another. they're all on equal ground so to speak.

wire a d2 in parallel gives you 1 ohm. wire a d4 in parallel gives you 2 ohms. wiring these together does not give you 1 ohm.

wire a d4 in parallel gives you 2 ohms. wire 2 d4's in parallel will give you 1 ohm.

see where i'm going with this?

[FeelDaBass]

no, because the coil configurations on the subs are all the same, thus all ending with the same configuration after all the wiring. one does not start out at a lower or higher configuration than another. they're all on equal ground so to speak.

wire a d2 in parallel gives you 1 ohm. wire a d4 in parallel gives you 2 ohms. wiring these together does not give you 1 ohm.

wire a d4 in parallel gives you 2 ohms. wire 2 d4's in parallel will give you 1 ohm.

see where i'm going with this?

I realize that, it would give you a final ohm load of .667 not 1 ohm, correct? The lowest impedance I was PLANNING on using was having the d2 wired for 4 ohms, the d4 wired to 2 ohms, and wiring those in parallel for a final ohm load of 1.333 ohms. I'm using http://www.the12volt.com/caraudio/boxcalcs.asp to get these ohm loads.

So with the same subs with d4s, for more efficiency of the amplifier, I could wire one to 8 ohms, and the other to 2 ohms and parallel them to get 1.6 ohms and that would be perfectly fine? (since they are the same coils & subs) Or would one receive more in that equation.

Sorry for all the questions, just trying to expand my knowledge of this topic.

[Torres]

you're overlooking the issue. one is already at a lower impedance than the other, so in the end result, one will still be at a lower impedance than the other. resulting it that speaker getting more power than the other. they must match. the impedances don't...blend, for lack of better word.

[FeelDaBass]

Alright, I have some swapping to do then. Thanks for all the info.

[Torres]

imo if you get 1 sub, get a d2 and wire in parellel, or 2 d4's to wire in parallel for 1 ohm at the amp and call it a day. i wouldn't try to do anything fancy.

[FeelDaBass]

That's the plan now. If 4 ohms works better, since pretty much stock electrical, then I'd do that just to avoid light dimming. Lights hardly dim the way it is right now, and I'm lovin' it. (d2 at 4 ohms).