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Old Today, 05:44 PM   #1
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anguskilminster's Avatar
Join Date: Dec 2006
Ohmage question

I'm rewiring my 4x12 cab with different speakers. I had a mish mash of 8ohm speakers & got a reading of just over 7ohms when wired with 2 in-series pairs running in parallel. I'm fitting 4 vintage G12H30's, which are 16ohms, so I've fitted an impedance selector, just a 5amp DPDT rocker switch, so I can change between 4 & 16 ohms.

When on low setting, it reads about 4.5ohms, but on the high setting it reads just over 21ohms! All the speakers individually read around 14.7ohms, so is this 21ohm reading average, or have I got a problem somewhere? Been checking the wiring for the last 2 hours & can't find why this should be

Please help!!!! Thanks in advance
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Old Today, 06:37 PM   #2
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Join Date: Jan 2012
You sure you don't have one of the speakers wired wonky?

You should be getting pretty close to 15 ohms if you have the four wired two each series and then the combination of the two sides parallel (or vice versa).
You should be getting around 3.5 ohms if you've got them all four wired in parallel.

ONE speaker is wired bassackwards.

Last edited by dspellman : Today at 06:39 PM.
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