Cardioid Bass.... yes, very good!! - Page 7 - 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 9th February 2013, 01:06 PM   #61
kees52 is offline kees52  Netherlands
diyAudio Member
 
Join Date: May 2009
Location: Sprang-capelle Holland.
Hi Roflynn

Thanks for the story, interesting, I have made also H frames and U frames, (leaking box version and normal version) the H frames did sound the best from all except the leanking box has more spl watt, (6dB) so it is worth to test further later on but try to make it cardioid is not easy below 40 hz you need a delay line and extra speaker then, oke what you sy about localise the bass always keep crossover below 100 Hz say 90 Hz will do because every ob can easely do 90 Hz without to much loss, and so you can put the subs on other places but fase can go troubling.

H frame

second test of H frame dipole speaker. - YouTube

and low tone with a dipole cardioid who has very small openings on the cones to lift up the qts, it did give serieus output but needs power and heavy cones so this one has not
much power need before going out of xmax..

20Hz bas tone trough dipole box - YouTube

it came from here.

http://www.kirchner-elektronik.de/~k...L-CARDIOID.pdf
  Reply With Quote
Old 9th February 2013, 03:18 PM   #62
kees52 is offline kees52  Netherlands
diyAudio Member
 
Join Date: May 2009
Location: Sprang-capelle Holland.
I did some measurement on the linkwitz w dipole, here are the results of a shelf filter in the amp and 120 hz low pass, on 260 Hz you see a rest of the dipole peak plus 4 dB so we need a notch here, I think make the box bigger, or longer bigger baffle when not folded we get a peak lower then the 260 Hz, I think the notch technic can alowed for a bigger folded open baffle W frame, even one with a slot two woofers and folding with notch give a higher efficienty what is oke. Even we go to 50 Hz or lower but it get a pipe and need maybe even more notch, I don,t now or notching wil have effect on the sound, never tryed.
Attached Images
File Type: jpg dipole measurement.jpg (142.6 KB, 421 views)
  Reply With Quote
Old 14th February 2013, 01:00 PM   #63
diyAudio Member
 
otto88's Avatar
 
Join Date: Dec 2007
Quote:
Originally Posted by john k... View Post
I will . . Thus will be a littler different because I will be using digital eq and delays to make things absolutely identical.

If we get a couple of rainy days I may be able to throw the old CRAW together and see if it still works. I don't have the drivers it is supposed to be used but some that are pretty similar.
When you get to it, I'm Very interested, I'll keep my eye out - what might you call the thread
  Reply With Quote
Old 14th February 2013, 01:15 PM   #64
diyAudio Member
 
otto88's Avatar
 
Join Date: Dec 2007
Quote:
Originally Posted by Elias View Post
In theory I like cardioids too. They have the potential of allowing them placed very close to the room front wall
Elias/ JohnK

Do you have a link or reference, re allowing them to be placed very close to the room's front wall?

Thanks
  Reply With Quote
Old 14th February 2013, 01:45 PM   #65
diyAudio Member
 
john k...'s Avatar
 
Join Date: Aug 2004
Location: US
Quote:
Originally Posted by otto88 View Post
Elias/ JohnK

Do you have a link or reference, re allowing them to be placed very close to the room's front wall?

Thanks
I did some simulations here.
__________________
John k.... Music and Design NaO Dipole Loudspeakers.
  Reply With Quote
Old 14th February 2013, 01:52 PM   #66
kees52 is offline kees52  Netherlands
diyAudio Member
 
Join Date: May 2009
Location: Sprang-capelle Holland.
If u use a bessel delay line it is most precise for some octaves.
  Reply With Quote
Old 14th February 2013, 02:07 PM   #67
Juhazi is offline Juhazi  Finland
diyAudio Member
 
Juhazi's Avatar
 
Join Date: Mar 2007
Location: Jyväskylä
We must remember the room and it's modes and nodes, if we consider bass output and reflections. They always create a resonant system (It is practically impossible to kill those) As we know music contains many frequencies and harmonics of them. It is a very heavy task to manage all this.

I think that a multisub approach is the most practical solution, it gives remarkable results even without dsp.

This is valid for bass region 20-90 (150)Hz. Above this early and late reflections are important. How do you control all this - I don't believe in making a well behaving (in a room) single speaker that goes 20-25000Hz.

The AV amplifiers have a subwoofer xo around 80Hz for a reason. This always gives me better bass than full range speakers (at home). And using this feature makes it easier to choose good main speakers and good sub(s) And I can place mains and subs to their optimal positions. (which are never same)

I have also a "pure 2ch" set. It is very hard to get bass right with it. The practical solution is to use it when playing vinyl records, speakers are 9 liter closed box that fail to go very low! They can however exite my room mode at 45Hz
__________________
AES Associate Member / My DIY speaker history: -74 Philips 3-way, -82 Hifi 85B, -07 Zaph L18, XLS10+PR/Hypex, -08 CSS125FR, -08 Hifitalo AW-7, -08 TangBand FR, -09 MarkK ER18DXT, -13 PPSL470, -13 AINOgradient

Last edited by Juhazi; 14th February 2013 at 02:22 PM.
  Reply With Quote
Old 12th March 2013, 04:55 PM   #68
boris81 is offline boris81  United States
diyAudio Member
 
Join Date: Oct 2009
Location: white plains, ny
Gainphile, did you pursue this idea further?
Did you get to take freefield measurements in 360 degrees?
  Reply With Quote
Old 5th May 2013, 05:54 AM   #69
Face is offline Face  United States
diyAudio Member
 
Face's Avatar
 
Join Date: May 2007
Quote:
Originally Posted by boris81 View Post
Gainphile, did you pursue this idea further?
Did you get to take freefield measurements in 360 degrees?
TTT...
__________________
"He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
  Reply With Quote
Old 6th May 2013, 11:32 AM   #70
diyAudio Member
 
gainphile's Avatar
 
Join Date: Dec 2007
Location: Melbourne the sunny city!
It's winter man ... 2 deg outside

__________________
http://gainphile.blogspot.com
  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
2-way: Waveguide + Cardioid-like keyser Multi-Way 147 11th August 2014 12:13 AM
Adventures in cardioid MBK Multi-Way 121 15th October 2012 12:44 PM
Cardioid Bass CLS Multi-Way 312 4th May 2012 08:46 PM
Cardioid with a TH sub FlipC Subwoofers 23 4th February 2012 08:03 PM


New To Site? Need Help?

All times are GMT. The time now is 02:02 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