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Posted by Toby Meyer on September 05, 2001 at 08:15:59:
In Reply to: Re: Simple question: 2 4-Ohm cabinets equal... posted by splatbass on September 04, 2001 at 23:07:01:
: : It depends how they are hooked up. If you plug 2 4-ohm cabs into 2 jacks on the back of your amp its going to be wired in parallel which would make it 2 ohms, and most amps cant hanldle that. If you connected the cabs in series it would be 8 ohms, but thats different.
: I believe connecting the speakers in a daisy chain would still be parallel, same as connecting to the back of your amp. To connect them in series you would have to change the wiring inside the speaker cabinet.
There's a formula to calculate the impendance of a speaker/cabinet:
Z = 1 / ( 1/A + 1/B )
Z is the impendance of both speakers, A is the impendance of the first speaker, B the impendance of the second speaker
Wired in series:
Z = A + B
If you wire two 4-Ohm speakers parallel:
Z = 1 / ( 1/4 + 1/4 ) = 1 / ( 1/2 ) = 2
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