Need Wiring help

[benk016]

I would like to know the best option for wiring my subs. My mono alpine amp is 350 watts at 2ohms, and 200 watts at 4ohms. I have two subs, one is a Rockford Fosgate fast&furious dual voice coil 4ohm sub, the other is a kicker single voice coil 4ohm sub. Is there a way to wire this to get down to 2 ohms to get the full power from the sub? I'd like to not ditch the 2nd sub as I have a dual enclosure and it will be in there if its used or not. I've been trying to figure this out and just can't. Any help would be greatly appreciated.

[qguy]

Wire the subs in parallel while ditching the one of the voice coils of the dual voice coil subs.

[weltersys]

Originally Posted by benk016

I would like to know the best option for wiring my subs. My mono alpine amp is 350 watts at 2ohms, and 200 watts at 4ohms. I have two subs, one is a Rockford Fosgate fast&furious dual voice coil 4ohm sub, the other is a kicker single voice coil 4ohm sub. Is there a way to wire this to get down to 2 ohms to get the full power from the sub? I'd like to not ditch the 2nd sub as I have a dual enclosure and it will be in there if its used or not. I've been trying to figure this out and just can't. Any help would be greatly appreciated.

No way to get a 2 ohm load without not using one voice coil, which wastes power dragging around extra undriven weight.

I'd suggest wiring the Rockford Fosgate fast&furious dual voice coil 4ohm in series, then parallel it with the kicker single voice coil 4ohm sub.

The difference between 350 watts at 2ohms, and 200 watts at 4ohms is less than 3 dB, doubling cone area adds 3 dB, assuming the speakers have similar phase response.

Compare it to qguy's suggestion and see which produces more actual SPL, speakers have far different impedance at different frequencies, hard to say what will actually work best with your amp without testing.

[ßart West-VL.]

Originally Posted by weltersys

I'd suggest wiring the Rockford Fosgate fast&furious dual voice coil 4ohm in series, then parallel it with the kicker single voice coil 4ohm sub.

That gives your amp a 6Ω load, The amp will be grateful for it. This is how I would do it too.

[Inductor]

Originally Posted by ßart West-VL.

That gives your amp a 6Ω load, The amp will be grateful for it. This is how I would do it too.

Plus one.

[AndrewT]

8//4 = 2.33

Don't any of you get taught metal arithmetic at school?

[ßart West-VL.]

Originally Posted by AndrewT

8//4 = 2.33

Don't any of you get taught metal arithmetic at school?

Neither did you, the correct answer is 2,667Ω

[ßart West-VL.]

So I mistakenly gave the average value but it seems that even this 2.6666...7Ω load can be handled by the amp, give it a try.

[Inductor]

Originally Posted by ßart West-VL.

So I mistakenly gave the average value but it seems that even this 2.6666...7Ω load can be handled by the amp, give it a try.

Yes. (In the case amp+low impedance doesn't work) The other way, (6Ω) is to parallel the 2 voice coils (2Ω) in one sub and series with second woofer (4Ω).

[AndrewT]

Originally Posted by ßart West-VL.

Neither did you, the correct answer is 2,667Ω

well caught. thanks.