4Ohm Sub & 2Ohm Amp

[Jazack]

hey guys, just got a 15" kicker c15 sub and i am wanting to hook it up to an alpine mrp-m350 amp.

is there anyway with these two pieces of equipment that i can run the sub at 2-ohms without stufing it completely??

[253@7k]

sorry mate thats a bit much for me.... I would ask 12volt king, see if he replies....

[Tasmaniak]

Wire the two coils in parallel. That will give you a 2ohm load to present to the amp.

The only issue is that the speaker will be underpowered by a significant amount. This may well cause damage to the amplifier and speaker if pushed to ANY form of distortion level.

[StoneX]

Wire it like this: (image "borrowed" from JL Audio tutorials section)

[Tasmaniak]

thank christ for the photo there Stone. I contemplated putting one up...but then I got distracted and never came back. Gotta love the daughter for that... "Daddy look at me!"

[Jazack]

hi guys,

thanks for the replys. i should have been a little more precise but the boss was over my shoulder.

the 4ohm sub is single voice coil (2 connectors (1+ 1-)) will that make any impact.

i know a little bit about all facets of stereo systems - but this ohm business has got me stumped.

any help appreciated.

Jazack.

[Tasmaniak]

lol Jazack...the ohms business IS the facet of stereo systems. The sub decides how many ohms you are at. Not the amp. So, if it's a 4ohm sub then thats where you are at with it. From memory you are now rated well with the amp and sub matched nicely.

[Jazack]

lol i meant i know a l'il about install.

From memory you are now rated well with the amp and sub matched nicely.

sorry mate, i didn't understand what you meant.

do you mean that they are evenly matched??

would i be better off with a dual voice coil 4 ohm sub running parallell or with a dual voice coil 2-ohm sub?

[StoneX]

lol i meant i know a l'il about install.



sorry mate, i didn't understand what you meant.

do you mean that they are evenly matched??

would i be better off with a dual voice coil 4 ohm sub running parallell or with a dual voice coil 2-ohm sub?

You would be better off with a dual voice coil sub with 4 ohm voice coils. When you wire this as shown above, it becomes a 2 ohm load for the amp.

This explains series and parallel wiring: http://www.bcae1.com/srsparll.htm

[Jazack]

thanx mate. i think im going to do this the smart way and go get a 2ohm dvc sub.

question: if i connect a 2ohm dvc in parallell will it bring the ohms down to 1ohm

[StoneX]

Yep.

In series you add the resistances (impedences) together.

In parallel there is a formula, but if you have two of the same number in parallel it is just half. So dual two = 1. Dual 4 = 2, etc.