ohm rise? testing?

[Kush Killer]

Ttt

[Lynbo]

Ok now I'm gettin confused lol

Let see if I can help or make it really confusing.

Is it really impedance rise or a impedance curve? Does the impedance rise and stay at that value there during system playback or does it fluctuate based on frequency played? In theory it is impedance curve as the motor travels through it range of motion to reproduce the signal sent to the speaker its value will change as the frequency changes. With the resonant frequency being the highest of this curve in a free air measurement.

In a daily system the impedance curve comes with the music playback territory and the different alignments you place your speaker into will have its own effect. Sealed, ported, bandpass enclosures all try to reproduce the music signal into sound waves for us to enjoy and whatever levels we choose, lol. But like others have said a good enclosure designer/builder can take all the variables for your install and come up with a good solution.

Impedance curve can not be viewed with a single meter it will take at least two meters and a disk of test tones. Take some readings at different frequencies (20- 80 hz.) and calculate the actual impedance. If you have easy access to your amp that is powering your subs and a DMM set it for AC voltage and read your output voltage (+ & -) from your amp during some music and you will see a glimpse of your sub working to produce different frequencies as the voltage fluctuates.

Edited August 9, 2011 by Lynbo

[David]

That's why the rockford constant powers are so freaking badass, they make the same power even with rise :-)