anyone remember how to calculate resistance in a parallel circuit?

[ElFenix]

i've go an extra book shelf speaker and i was wondering what the resistance of the circuit is if i wire them in parallel. two identical 8 ohm speakers. thanks!

 

[Sukhoi]

1/r = 1/r1 + 1/r2

 

[Heisenberg]

Originally posted by: Sukhoi
1/r = 1/r1 + 1/r2

Yep. For more than two loads, just extend the formula. For your case, it would be 4 ohms. Anytime you have two equal resistances in parallel, the equivalent resistance is just half.

 

[ElFenix]

thought so. 4 ohms. i think i'd blow my amp with that. crappy aiwa.

 

[Howard]

Originally posted by: ElFenix
thought so. 4 ohms. i think i'd blow my amp with that. crappy aiwa.

4 ohms of resistance really isn't that low...

 

[hdeck]

i remember those days of physics from high school =]

 

[sharkeeper]

That's DC resistance NOT impedance. Dynamic loudspeakers are reactive and inductive. Their impedance also changes with frequency unless you have a fancy conjugate LZ network between the VC and amp.

-DAK-