Tweaker's Asylum

• Re: Measuring speaker impedence? Rod B 17:50:04 06/09/01 (0)
  In Reply to: Measuring speaker impedence? posted by rameish on June 06, 2001 at 00:30:15:

  See our page, Tips and Tricks section for a how-to on the proper way to measure the impedance of a speaker.

  Rod
  

  • Hifi Audio Labs

  
  

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• Re: Measuring speaker impedence? bobwire 20:18:06 06/06/01 (0)
  In Reply to: Measuring speaker impedence? posted by rameish on June 06, 2001 at 00:30:15:

  Speaker Impedance

  What your DMM is telling you is the DC resistance of the voice coil. To do it right you will need an audio generator set to one volt and a series resistor of EXACTLY 1K ohms. The generator is set to F and its output is kept at one volt. This is fed to the speaker terminals. Measure the offset caused by the speaker impedance directly across the speaker terminals on the DMM in milivolts; it reads as if it were ohms. SO, 6.8 milivolts is 6.8 ohms! Easy! Change F and be sure you still have one volt and read the speaker again. I plot mine on log/linear plotting paper. Four cycles to do the full range from 20 to 20. bobwire
  
  
  

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