In Reply to: What do you make of this? (Impedance curves) posted by pix on March 4, 2017 at 07:44:06:
the cabinet type and woofer/subwoofer characteristics need to be stated. the rise at 20Hz could be the lower impedance peak of a large vented cabinet with low Fs woofer tuned a bit "high" (~32Hz) - if so, Z should drop towards Re as it goes down below 20Hz.A 10 ohm resistor could be compared with the meter at each frequency of interest to correct any non linearity in the meter and allow even cheap meters to work. Just adjust so it reads "10" with the resistor in place, then measure the speaker. Something is flattening or appearing to flatten out the impedance. It takes a function meter or sine generator with fine increments to do it by "hand".
Karlson Evangelist
Edits: 03/04/17
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: What do you make of this? (Impedance curves) - freddyi 14:48:25 03/04/17 (2)
- RE: What do you make of this? - kitch29 05:43:32 03/07/17 (0)
- Woofer characteristics - pix 23:20:35 03/05/17 (0)