- Nov 5, 2014
- Reaction score
And if you have a mystery speaker cab and you don't know the ohms, use a multi-meter and plug-in a speaker cord to the speaker cab and get a reading on the 1/4" mono jack to know for sure. If you run a 4 ohms cab on the 16 ohms Head setting, well it will not be good if you dime the amp for a while. We have jacks with a small 12" pigtail and alligator clips to test speaker cabs. Some cabs have a bad speaker and measure as low as 2 ohms sometimes. If you don't know what's in the cab, find out.
After you lose an OT on a good amp it wakes you up.
This is why most cabs are stenciled or labeled on the rear in a touring band.
not exactly...impedance and resistance are not the same thing, although both are measured in ohms..
A 4 ohm speaker will not read 4 ohms...
You are measuring passive or real resistance with a multi-meter.
The speaker is rated as an impedance which includes reactive (capacitance/inductive) as well as real resistance.
Typically...a speaker measured with a multi-meter will read lower than the rated impedance.