sakic19

I have an almost embarrasing question...I keep reading all this 'into 2 ohm' and into 4 ohm stuff, i know ohms is resistance so obviously 2 ohm is better, I just want to know when your wiring it how do u wire it for 2 or 4? Is it the speakers that decide that or the wires or what?

Also are their any draw backs to going with 2 ohm?

Thanks

DesolataX

iTrader: (1)

The magnet determines the impedance load, the magnet inside of the sub has resistance. If your sub has 2 voice coils, it can be wired into 8 ohm (lots of resistance) or 2 ohm (not much resistance). Amps can create more power at a lower resistance because their is less resistance, thus letting it push power easier. There are no disadvantages of going to 2ohms, you pretty much want to go as low as you can, as long as your amp supports it.

If I am wrong, please correct me.

zinger002

iTrader: (1)

i thought the resistance came from what the power flows through thus the voice coil and the windings itself determins the resistance.

also resistance changes as a factor of heat generated by the coil. the same principle as a light bulb kinda...

Starterwiz

Consider yourself corrected....now get to your room! lol
The voice coil determines the resistance, not the magnet.
The resistance (impedance) must be matched to the amp or you will waste power.
Any impedance will work best if the amp is matched, and it's the combination of amp/box/sub that is important.
Dual voice coils can be any impedance....and can be bought to wire in lot's of combinations, but each part affects the others, so the entire system must be designed as a whole. That is what adds the "art" to the "science".

Weston

iTrader: (1)

The resistance is the resistance of the voice coil.

sakic19

So say I have a sub that has 2 ohm and an amp with 2 ohm or 4 ohm, is there anything i have to do to make it go 2 ohm? or will it automatically detect the resistance and sort it self out?

Basically, can I just hook it up as long as the resistance matches up and it will go to the lowest resistanceo n its own? thanks

Starterwiz

the resistance of your sub or speaker is what it is.
it will go up if you add another speaker in series, or go down if you add another in parallel.
The amps power will go up if the resistance is lower, to a point. Below that point, the amp will see a resistance too close to zero (short circuit), and will shut down or fry.
So to achieve maximum output, you want your amp running a quarter Ohm before it blows.
If your amp is 2 or 4 Ohms, and your sub is 2, then your amp will see a 2 Ohm load and you will be fine.

zinger002

iTrader: (1)

Holey sheet i effing know 1 thing about car audio!!! woo... 130 db's here i come...!!!!

sakic19

Alright so basically if im buying subs and amp, i wanna make sure that the amp can do the resistance that the sub requires, and when i hook it up I dont need to do any adjustments on the amp or sub or anything...?

Starterwiz

No...you want to make sure that the guy selling you the subs and amp knows his stuff...then all you have to worry about is what tunes to play.