filler-driver crossovers--a question - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

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
Reply
 
Thread Tools Search this Thread
Old 17th November 2004, 03:34 PM   #1
diyAudio Member
 
Join Date: Oct 2004
Default filler-driver crossovers--a question

Hi all,

I recently read John Kreskovsky's interesting article about transient-perfect filler driver crossovers. If I understand correctly, he's crossing the high and low with 2nd-order Linkwitz-Riley slopes IN PHASE so there's a deep cancellation. Then he's filling in the cancellation with a filler driver with a narrow passband and 1st-order slopes.

Ok, so I got wondering if there would be any merit to using my 2-way pro audio electronic XO in a similar way. I would reverse the phase of one side, which would create a null between the bass and treble, then I'd cross in a filler driver passively with a series cap and coil.

The only catch is that my electronic XO has *4th-order* L/R slopes.

So I guess my question is how would the end result of the filler driver concept be different using 4th-order slopes on the bass/treble?
  Reply With Quote
Old 18th November 2004, 04:09 PM   #2
Bill F. is offline Bill F.  United States
diyAudio Member
 
Bill F.'s Avatar
 
Join Date: Nov 2001
Location: SW MI
*Bump*

I'm curious about this, too. Anyone?
  Reply With Quote
Old 18th November 2004, 04:20 PM   #3
diyAudio Member
 
Bill Fitzpatrick's Avatar
 
Join Date: Jun 2001
Location: Eugene, OR
As I recall, it was B&O that tried this about 30 years ago. I guess it looked good on paper but it didn't fly.
  Reply With Quote
Old 19th November 2004, 12:14 PM   #4
diyAudio Member
 
Join Date: Oct 2004
It seems to me that whatever the slopes of the high and low, they will be phase coherent since they're mirror image. But specifically I'm wondering what FR probs 24dB slopes might have compared to 12db slopes. I expect there may be some ripple? Can anyone sim this?
  Reply With Quote
Old 19th November 2004, 04:00 PM   #5
diyAudio Member
 
Join Date: Nov 2003
Location: flyover country
Mixing higher filter orders like this may give some narrowband notches and peaks that may detract from the listening experience.

I'm doing something a little similar with a 2 1/2 way system I designed using three 2226J woofers in a vertical array where the top one handles most of the signal from 300hz-700hz before crossing over to the HF unit (all quasi first order). Even though there's no significant response anomaly on the HF horn axis, the single source of the band limited information can occasionally call attention to itself a bit as you move up and down vertically due to differences in off axis radiation patterns at different frequencies.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Newform R30 ribbons, crossovers, and midbass driver cowanrg Swap Meet 13 19th December 2007 04:26 PM
"Filler" driver ala B&O augerpro Multi-Way 18 19th October 2006 12:47 PM
quick question about crossovers pocketcincos Multi-Way 6 21st July 2006 10:52 AM
question about crossovers Robertburchell Multi-Way 2 20th July 2006 10:03 PM
question on active crossovers ogp Everything Else 7 2nd November 2001 12:21 PM


New To Site? Need Help?

All times are GMT. The time now is 05:52 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2