Diffence between 2ohms and 4 ohms?

Question

Whats the diffrence between having 2 ohms and 4 ohms??
Please tell me if this is worth it, i could get 900 watts with a 2ohm, or i could get 550 watts with 4 ohms.
This is for an amp and a speaker, cant decide which version to choose
as the speaker goes, its a kciker l7 1500 peak power. RMS 750 Watts. The same specs for both exept one is 2 ohms and the other is 4.

OH YEAH AND IM GETTING TWO SUBS AND TWO AMPS..

Answer 1

So you best understand, think of this.... should I kink the garden hose 25%(4 ohms) or 75%(2 ohms). 100% would be 0 ohms or a dead short.


When loading an amp, the lower the ohms the harder it must work and the hotter it'll get. Likewise the higher the distortion.

The different speaker ohms just allows you to choose wiring methods to get the right ohms.

For instance, if you want to load an amp at 4 ohms with two subs, then you would get two 2 ohm and wire them in series. This adds the ohms together.

-or-

if you want to load an amp at 2 ohms with two subs, then you would get two 4 ohm and wire them in parallel. This divides the ohms only if both values are the same. The fomula for parallel is:

Where Z = total ohms and sub# is sub (or coil in a multi-coiled sub):

Z = 1 / (1/sub1 + 1/sub2 + 1/sub3 + ...) as many as you have.

E-mail me if you want more detail on this

[e-mail]

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Well Mark B,

It's not that I don't know ohms law. You explained resistance very well, however I was explaining the concept of a load on a power source which you failed to recognize.

You also failed to realize he had posted another question with specific equipment in mind. This was what I was going on.

http://answers.yahoo.com/question/index;_ylt=Alv9xucVgCBSN4gHomhARoXsy6IX?qid=20061218141529AA6jFml

Oh, and "The lower the resistance, the higher the power output will be with less work required from the amp,...BLAH BLAH BLAH....meaning the amp will not get as hot as the 4-Ohm load.
" is wrong. Put a 100 ohm load on a battery and a 500 ohm load on another battery. Which one will die first? The 100 ohm. Why? Because it has to WORK HARDER!!!

Answer 2

Holey smokes is that dude wrong about Ohms!

Ohms are a measure of resistance, the lower the ohm rating, the lower the resistance. 2 Ohms is a lower resistance than 4 Ohms, 0 Ohms is no resistance at all (not gonna happen, the wires cause a resistance so there will always be some resistance).

Amplifiers require a certain resistance to function properly, some are 2-ohm stable, some are 4-ohm stable (some are even 1-Ohm stable). Meaning they're stable and provide constant power at the selected resistance. They will not function properly and will likely burn up at lower resistance loads than their rating, the rating should be listed in the amplifier's specs.

The lower the resistance, the higher the power output will be with less work required from the amp, therefore, if you can wire a 2-Ohm speaker to the amp, you can get more power than if you wired a 4-Ohm speaker to it. This means you can get a 2-Ohm speaker as loud as the 4-Ohm speaker while using less power and putting a lower load on the amp, meaning the amp will not get as hot as the 4-Ohm load.

The series and parallel wiring part is correct, though.