S15: Econowave DSP - a Constant Directivity vs Dipole study - Page 15 - 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 21st March 2011, 10:53 AM   #141
diyAudio Member
 
The Space Egg Corp's Avatar
 
Join Date: Sep 2010
Location: London & Miami
Blog Entries: 13
Quote:
Originally Posted by gainphile View Post
High:
High pass filter: 1khz LR4
Horn Notch: 1900hz, -4db, Q=1.4
Gain: -11db
Delay: 0.1ms
Tweeter protect: 68uF non-polar capacitor

Low:
Low pass filter: 1khz LR4
Driver notch 1 : 704hz, -3db, Q=3
Driver notch 2 : 1037hz, -3db, Q=6
Hi gainphile

Just saw your speakers on the site.

I am looking to enjoy highish frequencys from a large dia. LF driver, and cross over a compression driver at a 'low' frequency also.

My bets are that this is totaly possible, although there seems to be a lot of 'conventional' opinion out there that this is not possible.

I was very pleased to see that you have ignored the 'conventional' and done just that.

I'm sure that it is 'conventional' dogma that puts people off trying this more often than seems the case.

Good to hear they sound to your ears a winner.

Cheers

Simon

P.S. I am wanting to use the square 90x90 version of the waveguide you have used, which also some have speculated won't work that low.
Tear up the rule book and just listen.
Nice work gainphile.

Last edited by The Space Egg Corp; 21st March 2011 at 10:56 AM.
  Reply With Quote
Old 21st March 2011, 03:24 PM   #142
Sheldon is offline Sheldon  United States
diyAudio Member
 
Join Date: Dec 2003
Location: San Diego
Now put some reticulated foam in those waveguides, ala Geddes, and tell us what you think.

Sheldon
  Reply With Quote
Old 21st March 2011, 03:50 PM   #143
badman is offline badman  United States
diyAudio Member
 
badman's Avatar
 
Join Date: Sep 2003
Location: Sunny Tustin, SoCal
Quote:
Originally Posted by Sheldon View Post
Now put some reticulated foam in those waveguides, ala Geddes, and tell us what you think.

Sheldon
And some foam projecting forward from the front baffle, around the mouth- softens that edge termination, makes it act partially like a much bigger horn.
__________________
I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!
  Reply With Quote
Old 22nd March 2011, 06:08 AM   #144
diyAudio Member
 
gainphile's Avatar
 
Join Date: Dec 2007
Location: Melbourne the sunny city!
The Econowaves are not gedlee clones ... but yes I'll try the foam one day. I've had good reports with non-gedlee speakers too and they're not too expensive.
__________________
http://gainphile.blogspot.com
  Reply With Quote
Old 22nd March 2011, 06:21 AM   #145
diyAudio Member
 
The Space Egg Corp's Avatar
 
Join Date: Sep 2010
Location: London & Miami
Blog Entries: 13
Quote:
Originally Posted by Sheldon View Post
Now put some reticulated foam in those waveguides, ala Geddes, and tell us what you think.

Sheldon
Just use some decent grill cloth.
If you must have 'foam'...
Try a slice of saucepan scourer.
Thats quite good for getting an acceptable sound from any over-active metal tweeters.

Cheers

Simon

Last edited by The Space Egg Corp; 22nd March 2011 at 06:24 AM.
  Reply With Quote
Old 22nd March 2011, 03:13 PM   #146
Sheldon is offline Sheldon  United States
diyAudio Member
 
Join Date: Dec 2003
Location: San Diego
Quote:
Originally Posted by gainphile View Post
The Econowaves are not gedlee clones ... but yes I'll try the foam one day. I've had good reports with non-gedlee speakers too and they're not too expensive.
Nor are my Unity's.


Quote:
Originally Posted by The Space Egg Corp View Post
Just use some decent grill cloth.
If you must have 'foam'...
Try a slice of saucepan scourer.
Thats quite good for getting an acceptable sound from any over-active metal tweeters.
The issue here, is not excessive highs, but internal reflections in the horn - the things that make it sound like a horn. The foam attenuates those reflections, and requires some depth. I fill all the way to the phasing plug of the compression driver. If the horn is fairly shallow, you can fill the the front. If it's deeper, a partial fill is nearly as effective. In my hands, a depth of 10cm or so does most of the work.

Sheldon

Last edited by Sheldon; 22nd March 2011 at 03:17 PM.
  Reply With Quote
Old 24th March 2011, 11:04 PM   #147
diyAudio Member
 
gainphile's Avatar
 
Join Date: Dec 2007
Location: Melbourne the sunny city!
Instinctively I don't like anything blocking the HF range.

But I'm open to ideas. I've placed orders for the foam.

I will post measurements and listening impression once they arrive.
__________________
http://gainphile.blogspot.com
  Reply With Quote
Old 28th March 2011, 03:04 PM   #148
diyAudio Member
 
gainphile's Avatar
 
Join Date: Dec 2007
Location: Melbourne the sunny city!
Default ewave + foam

This is my eWave *with* foam

Click the image to open in full size.

The foam causes attenuation of -2db.

blue: original
black: with foam insert
Click the image to open in full size.

The attenuation is quite uniform, as shown by compensated graph below. It tracks very identical to no-foam. So this is good. Only in extreme highs that it deviates.

blue: original
black: with foam insert and +2 db.
Click the image to open in full size.

The changes to the sound is subjectively subtle, and that is consistent with the above plots. I thought horn coloration is reduced, but at the expense of airy-ness. It's a good tradeoff.
__________________
http://gainphile.blogspot.com
  Reply With Quote
Old 28th March 2011, 03:45 PM   #149
pos is offline pos  Europe
diyAudio Member
 
pos's Avatar
 
Join Date: Feb 2008
Location: Paris
Nice!
Would you have a side view of your foam plug?
  Reply With Quote
Old 15th December 2011, 07:49 PM   #150
diyAudio Member
 
Join Date: Jul 2005
Location: Uitgeest
Hi Gainphile,
Respect for your work! One question, did you try Econowave and a 15" woofer in OB?

Can boxed low - mid be the reason for wins to dipole?

I'm using Econowave DE250 with AE speaker LO15 in OB.

BR,
Jeroen

Last edited by Jeroenkv; 15th December 2011 at 07:51 PM.
  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
Constant Directivity Horn EQ Horizons Multi-Way 4 19th December 2008 11:41 AM
Constant directivity EQ Saurav Multi-Way 11 19th May 2008 02:41 AM
Constant directivity horn - or waveguide? hasselbaink Multi-Way 6 1st April 2008 01:24 PM


New To Site? Need Help?

All times are GMT. The time now is 05:57 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