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Measuring AC Frequency and Impedance
The AMM-1 allows the user to measure impedance of a
speaker load at any frequency from 20Hz - 1kHz at any
power level (up to approx 15,000 Watts). This is very
powerful information to have when designing subwoofer
enclosures. For lots of information on impedance
sweeps and what they mean, please visit our website
www.DAmoreEngineering.com and visit our products
section. Here you will find our IM-SG tool. There is a
Free Download to the owner's manual for that tool there
that contains lots of useful info on this topic. Enjoy
How to measure AC Frequency
1. Power on the AMM-1 by pressing the ON button
2. Unit will power up, display internal battery condition,
and then land on the DC Voltage Screen.
3. Press the MODE button four times (or hold down) to
get to the AC Frequency and Impedance screen.
4. Connect the voltage harness to the banana jacks
and then to the amplifier speaker outputs (+) and (-)
or the AC source of interest. As long as the signal
input is over a few volts the frequency of the sine
wave will be displayed
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