CompMan

iTrader: (1)

Let's just start by saying Ohms confuse the hell out of me!!

I have a Alpine PDX-1.1000 amplifier that I want to run at 4 ohms. I'm planning to buy 2 Alpine Type R 10" subs.

They come in 2 versions, one says 2ohm + 2ohm and one says 4ohm+4ohm. Now which one do I buy to run at 4ohm? With two of them in parallel.

Hoss

The dual 4 ohm flavor.

Wire each sub in parallel, and then tie the subs together in series.

nuke0907

iTrader: (2)

first off, you cant set your amp to run at a certain resistance. it is dependent on your load(the subs).

here's a link to some very good info to help you out.
http://www.crutchfield.com/learn/lea...amp_guide.html

Charles R. Hill

iTrader: (7)

Although some amps have selectable load, this Alpine does not. However, it will drive either 2 Ohm or 4 Ohm loads, according to Alpine.

http://www.alpine-usa.com/US-en/prod...del=PDX-1.1000

Hoss has the right idea as for wiring but I wonder why you want to use dual-coil subs only to play around with series/parallel wiring?

cornholio135

iTrader: (2)

I found this and it was very interesting on the advantage of dual voice coils...

seems more for flexibility than anything...

http://mobile.jlaudio.com/support_pages.php?page_id=163

Hoss

The subs he wants to use are only offered in the dual coil configuration.
The ONLY advantage multiple coil subs have is flexibility. I have worked with a lot of speaker design, and there is nothing else to gain from using more than one coil other than multiple wiring options. Most manufacturers aim to provide woofers that mate with their amps to work at an ideal impedance load.

firebirdude

iTrader: (3)

The only thing I could possibly see as an advantage to DVC subs versus SVC subs would be power compression. Dumping 2kWRMS on one coil versus 1kWRMS on two coils. Never really comes into play for the masses though.

Hoss

That isnt exactly how it works though, unfortunatly...

You are still putting 2kw into the same space, through most likely the same length of wire, and would still generate the same amount of heat...

firebirdude

iTrader: (3)

although I'm sure that's true, I just figured it'd be one less place for heat to build up.

CompMan

iTrader: (1)

So hoss has the answer?

Thank you very much, this stuff get confusing lol

firebirdude

iTrader: (3)

Yup. Dual 4 ohm and wire them just as Hoss said.

Hoss

Hoss has all the answers... lol :p