Go Back   Home > Forums > >

XKi - X's ab initio Karlson 6th Order Bandpass
XKi - X's ab initio Karlson 6th Order Bandpass
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
Old 10th November 2020, 07:44 PM   #1181
freddi is offline freddi  United States
diyAudio Member
 
freddi's Avatar
 
Join Date: Aug 2005
you could ask XRK971 for a punchy alignment in akabak with the little Eminence 8 specs


Def_Driver ‘Parts Express 290-4007’ | Eminence 8 inch Buyout woofer, 5.1mm xmax
Sd=214.2cm2
Fs=37Hz
Mms=22.3g
Qms=8.34
Qes=0.34
Re=5.19ohm
Le=0.87mH
Vas=53.525L


Or if you have Windows, get David McBean's wonderful hornresp program and make estimates as a series bandpass. I would do that for you if I still had access to hornresp.

You could probably make a decent guesstimate treating it as a bass reflex but shortening the vent somewhat as the front aperture acts partly as the vent.

Using an online reflex calculator that 8 inch Eminence should do 50Hz in 25 liters so one cubic foot is enough for the rear chamber and driver. The front chamber's volum might be chosen to be 1/3 that of the rear chamber. The vent's area needs to be made larger than in the example below. There should be online vent calculators for a given volume and Fb.

XRK971's original Beta8cx XKi is probably pretty close to what you could use


Click the image to open in full size.

Last edited by freddi; 10th November 2020 at 08:07 PM.
  Reply With Quote
Old 12th November 2020, 09:16 AM   #1182
freddi is offline freddi  United States
diyAudio Member
 
freddi's Avatar
 
Join Date: Aug 2005
Is there an updated - "final" drawing available for the XRK971 Beta 8CX XKi cabinet ?
  Reply With Quote
Old 12th November 2020, 11:17 AM   #1183
xrk971 is offline xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC (Virginia)
XKi - X's ab initio Karlson 6th Order Bandpass
No, whatever is posted already is it.
__________________
XRKaudio https://www.etsy.com/shop/XRKAudio
  Reply With Quote
Old 14th November 2020, 03:44 AM   #1184
freddi is offline freddi  United States
diyAudio Member
 
freddi's Avatar
 
Join Date: Aug 2005
Thanks X. - - I'll have to look at these two XKi and suggested vent mod to one. Seems to me Beta8CX would not be too untuned if in the B&C CX cabinet


Click the image to open in full size.
Click the image to open in full size.
  Reply With Quote
Old 16th November 2020, 01:00 AM   #1185
freddi is offline freddi  United States
diyAudio Member
 
freddi's Avatar
 
Join Date: Aug 2005
hey X - - regarding your suggestions of an XKi for my P-Audio SN10C does this sketch look close enough?

The suggestion was 12"x12"x16" internal

I think there's about 23 liters in the rear chamber after driver displacement so a bit undersized vs 25.5 liter. The front is about right.'

How far would you gap the front edge of the vent to the inside of the aperture?


Click the image to open in full size.
  Reply With Quote
Old 23rd November 2020, 11:57 PM   #1186
EddieT is offline EddieT  United States
diyAudio Member
 
Join Date: Apr 2014
Location: Mountains of WNC
Finally completed my little K5 cabs modified to add an XKi style duct feeding the shelf vent already in the cabs. The drivers are PA130-8s fed from a 50w x2 Chinese Bluetooth amp. I am sitting here listening to Amy Levere who accompanies herself with a contra bass. The bass is incredible for a 5" speaker in a small cab. Evaluation is subjective as I don't have windows or test software.
  Reply With Quote
Old 24th November 2020, 01:01 PM   #1187
xrk971 is offline xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC (Virginia)
XKi - X's ab initio Karlson 6th Order Bandpass
Nice work, EddieT!
__________________
XRKaudio https://www.etsy.com/shop/XRKAudio
  Reply With Quote
Old 24th November 2020, 05:38 PM   #1188
EddieT is offline EddieT  United States
diyAudio Member
 
Join Date: Apr 2014
Location: Mountains of WNC
I experienced an interesting illusion. Anxious to hear the K5s I just had them sitting near my feet and was listening as I read a book on-line. It seemed that the sound was coming from across the room and I really had to concentrate to place its origin at my feet.
  Reply With Quote
Old 25th November 2020, 12:23 AM   #1189
freddi is offline freddi  United States
diyAudio Member
 
freddi's Avatar
 
Join Date: Aug 2005
- anyone here game to make improvement suggestions on these two K-type?

larger one is for Delta10a but assume would work also for my Tymphany10

little one is for midrange only with an eight inch B&C.


Click the image to open in full size.

Click the image to open in full size.
  Reply With Quote
Old 26th November 2020, 12:33 AM   #1190
EddieT is offline EddieT  United States
diyAudio Member
 
Join Date: Apr 2014
Location: Mountains of WNC
The only short screws I had on hand were " flat head #4, not the best for easy driving or removal. I will pick up some " Phiilips or square drive pan head #6 so that I can easily remove the rear panels for padding experimentation. I only lined the speaker chamber with felt (laminate floor underlay)for starters.
  Reply With Quote

Reply


XKi - X's ab initio Karlson 6th Order BandpassHide this!Advertise here!
Thread Tools

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
6th order bandpass question tinitus Subwoofers 13 8th March 2009 07:01 PM
6th order bandpass Chris8sirhC Subwoofers 1 13th September 2008 08:09 PM
6th order bandpass subwoofer Ilianh Subwoofers 50 25th January 2003 02:40 AM
6th-order Bandpass BAM Subwoofers 1 24th September 2001 06:51 PM
6th order bandpass design? SubNut Subwoofers 3 22nd September 2001 09:48 PM


New To Site? Need Help?

All times are GMT. The time now is 11:12 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki