|
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: The 'filter point' is defined as the frequency that's half power = -3dB. posted by jeffreybehr on November 29, 2005 at 18:17:39:
I believe on 2nd order Butterworth filters (Q=0.5) the filter point is specified at -6db rather than standard -3db. The 30 Hz will be down about 13.6 db and the 15 Hz down 24db. I never quite understood why this the convention is changed, but with a symmetric 2nd order xo the crossover point is at -6db and the resulting output is flat (when phased-aligned).
I may be an egoist but at least I don't talk about other people.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Re: The 'filter point' is defined as the frequency that's half power = -3dB. - neolith 15:49:08 11/30/05 (2)
- Butterworth Q = .707 - Slider 16:49:59 11/30/05 (1)
- Re: Butterworth Q = .707 - neolith 14:59:56 12/01/05 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
