|
|||||||
| Home | Forums | Rules | Articles | Store | Gallery | Blogs | Register | Donations | FAQ | Calendar | Search | Today's Posts | Mark Forums Read | Search |
| Multi-Way Conventional loudspeakers with crossovers |
  |
|
|
|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving |
 |
|
|
Thread Tools | Search this Thread |
8th May 2005, 06:22 PM
|
#1 |
|
diyAudio Member
Join Date: Dec 2004
Location: .........
|
Butterworth question
If a 1st order Butterworth filter has a minus 3db point at 140Hz and a minus 9db point one octave lower at 70Hz how does one calculate the minus 6db point?
Presumably this will be around 100Hz? Is there a formula? Forever mathematically challenged but trying.. 
|
|
|
8th May 2005, 06:35 PM
|
#3 |
|
diyAudio Member
|
A(dB) = 10 log[1+(wx/wc)^2n]
A =attenuation at wx; wx/wc is ratio of freq where att is wanted to 3dB filter cutoff freq wc; n = filter order Jan Didden
__________________
/Another new issue: Linear Audio Volume 3! |
|
|
|
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
| Thread Tools | Search this Thread |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Crossover Debate: Bessel vs. Butterworth | MarcMTL | Multi-Way | 41 | 23rd September 2008 05:47 PM |
| Butterworth or Bessel | metal | Chip Amps | 1 | 26th June 2004 08:48 PM |
| butterworth filters design | p2mine | Chip Amps | 30 | 24th June 2004 06:34 PM |
| Butterworth vs. Bessel vs. 2nd order... | squidbait | Multi-Way | 7 | 7th April 2004 04:18 PM |
| what's the formula for 3rd order Butterworth ??? | bbaker6212 | Multi-Way | 2 | 9th August 2002 12:47 AM |
| New To Site? | Need Help? |
| Page generated in 0.06352 seconds (67.32% PHP - 32.68% MySQL) with 10 queries |
