Quick question on impedance

[utherpen]

I should know this but don't... I have a PA head that on the back states at least 4 ohms. I have 2 cabinets that are rated 16 ohms (each) . Can I use these cabinets with this head, and what will the total impedance be ? Please help. Thanx

[The Late Great Libido]

I believe that if you have 2 speaker cabinets that you hook up in parallel (one cable to each cab input) it cuts the two 16 ohm cabs to 8 ohms overall. If they are hooked up in series (cable from head to cab 1 to cab 2) it will knock the impedance to 4 ohms.

Note from Brandon Drury: The last line is incorrect. if 2 16 ohm cabinets are run in series, the impedance is 32 ohms. Normally, I wouldn't edit a post like this, but the info on the forum MUST be as accurate as possible.

This is based on my knowledge of guitar speakers so if I'm wrong, someone call me out....

[utherpen]

Thanks mate, that helps

[.tom]

parallel connection of equal impedances will halve the impedance. series connection of equal impedances will double the impedance.


run those cabs in parallel -it'll be 8 ohms... more than mfr suggested 4 ohms.. may require knobs to be max'd -all good to do tho.

[utherpen]

Thanks for the responses, Libido & tom. I'm new to posting but have been here about a month, gleaning info. Great site !

[The Late Great Libido]

Good call, Brandon. Wasn't thinking straight on that one.