|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
|
|
Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
|
In Reply to: then another question on zobels posted by klaus on November 2, 1999 at 04:08:13:
Yeah, that's the problem with Zobels. Basically the impedance of a dynamic driver at high frequencies is the VC resistance plus a coil impedance. If the coil were in air, that impedance would be an inductance. But in the presence of the iron and magnet, all the magnetic properties come into play. It winds up approximately halfway between a resistance and an inductance. A real Zobel, to counter that, would need a resistor in series with something halfway between a capacitor and a resistor. You can approximate this with a combination of resistors and capacitors, more of them giving a better approximation.I usually figure that you want a resistive total impedance at and around the crossover frequency; then I design a simple RC Zobel there. The coil impedance at that frequency has a resistive part, so the Zobel resistance is more than the DC coil resistance. To work it out, you need to know both the real and the imaginary impedance of the speaker at the design frequency. It's a pain, and not really satisfactory.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Re: then another question on zobels - Paul Joppa 21:20:02 11/02/99 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
