Update 2019: The Elliot Sound Products page was updated in June of 2018, three months after I posted this video. It looks like the Qes formula was updated with the note, "While this is supposed to be the correct formula, many have found it gives Qes that's much too high." It also looks like he updated the formula for r0 as well. So the formulas used in this video are not accurate, but the methodology is. Please use the updated formulas.

Measuring the Thiele/Small Parameters of a speaker when the manufacturer's documentation cannot be found. Using a cellphone and multimeter. Timestamps below...

"That didn't take too long," he says at 18:58. HA!
Theory begins at 4:44
Actual measurements begin at 8:14
Calculations and results begin at 19:13
Summary begins at 27:25

Elliot Sound Products website: http://soundau.com/tsp.htm
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