ohm load question

[chris96camaro 10+ year member]

If a sub is dual 4ohm can it be wired to a 2ohm load, because the sub i am loooking at runs 900 rms to 2ohms but the sub is a dual 4ohm? Thanks in advance

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[JimJ 5,000+ posts]

If you wire the VC's in parallel, you'll get a two ohm impedance.

 

[chris96camaro 10+ year member]

and that can be done to any sub?

 

[Deamonicus 10+ year member]

That can be done to any sub that has 2-4 ohm voice coils.

 

[JimJ 5,000+ posts]

Wiring two voice coils in parallel will always halve the impedances, series wiring will double it...

 

[Bigrick31 10+ year member]

here is the forumlas to figure out vc comfigs

Parallel wiring=lower resistance

Rt= (R1 X R2)/(R1 + R2) (note / means divide)

RT= Total speaker resistance (or Ohms)

R1= Resistance in speaker 1 (or Ohms)

R2= Resistance in speaker 2 (or Ohms)

example if you have 2 8 ohm subwoofers and want to wire them in parallel

(8 X 8)/ (8 + 8) = 64/16

RT= 64/16 simplified

RT= 4 so wired in parallel 2 8 ohm subs would yeild 4 ohms of resistance

Series= Higher resistance

RT= (R1 + R2)

Example again with 2 8 ohm subwoofers

RT=8+8

RT=16

if your using dual vc speakers you add the vc resistance of each sub together.

example using 2 dvc 2 ohm speakers

R1= 2+2 (each vc is 2 ohm)

so R1=4 and the same for R2 then plug that into the formula

 

[jsloan10 10+ year member]

//content.invisioncic.com/y282845/emoticons/word.gif.64b12e39f936af3b4fff38a1c0bd0244.gif beat me to it..

I use (one divided by ohms) plus (one divided by ohms) = one divided by answer

(the one is constant)

Example- 4- 4ohm woofers parrellel

(1/4+1/4+1/4+1/4)=1/answer

(.25+.25+.25+.25)=1/answer

(1)=1/1

=1ohm

3-4ohm woofers parrallel

(1/4+1/4+1/4)=1/answer

(.25+.25+.25)=1/answer

(.75)=1/.75

=1.3333...ohm

Parrallel is A+B+C+D

4+4+4+4

16ohms

Same stuff as above just simplified abit.

 

[Raffi 10+ year member]

http://www.crutchfieldadvisor.com/learningcenter/car/subwoofers_wiring.html?subs=1&impedance=DVC4x2

Should help!

 

[saywhat? 5,000+ posts]

u said u got two rl-p 12's right? they only come in dual 4 right now.....you will run the eD nine.1 i take is he 900 rms at 1 ohm so you will ACTAULLY get 1200

 

[dopey 10+ year member]

you can also use the formula Rt= R/n

where R is the common resistance. in this case 4 ohms

and n is the #of resistors. in this case 2

Rt=4/2

Rt=2 ohms.