Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

"Unitized" Image Control Waveguide
"Unitized" Image Control Waveguide
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 12th June 2019, 12:18 AM   #161
Patrick Bateman is offline Patrick Bateman  United States
diyAudio Member
 
Patrick Bateman's Avatar
 
Join Date: Oct 2006
Location: San Diego
True.

A low will come down to "what polar response can I live with?"

Because the midbasses that are on the outside will have a response that isn't 100% consistent with the ones on the face of the enclosure.

A lot of this will be mitigated by the low crossover frequency, which should be somewhere between 350 and 700Hz.
  Reply With Quote
Old 12th June 2019, 12:20 AM   #162
Patrick Bateman is offline Patrick Bateman  United States
diyAudio Member
 
Patrick Bateman's Avatar
 
Join Date: Oct 2006
Location: San Diego
Click the image to open in full size.

Click the image to open in full size.

It's starting to look like a speaker now

Click the image to open in full size.
This gives an idea of the size, compared to the Cosynes

Click the image to open in full size.
I laser cut the trim rings for the midbasses. Basically the wood turns the foam into a constrained layer damping composite. I can upload the SVG file for the trim ring if anyone wants it.

Click the image to open in full size.
Our cat thought I made her a fort
  Reply With Quote
Old 12th June 2019, 01:26 AM   #163
Brinkman is offline Brinkman  United States
diyAudio Member
 
Join Date: Aug 2007
Location: Oakland, CA
"Unitized" Image Control Waveguide
Default More progress

First coat of paint after priming. This is pretty damn close to the finish one gets from a DIYSG SEOS waveguide.
Attached Images
File Type: jpg F70E64CD-8665-443C-A7DB-E0320F051CF7.jpg (991.3 KB, 274 views)
File Type: jpg EF55DB19-E8A7-48BE-B39F-76308B9B6FE4.jpg (636.6 KB, 73 views)

Last edited by Brinkman; 12th June 2019 at 01:29 AM.
  Reply With Quote
Old 12th June 2019, 01:45 AM   #164
Patrick Bateman is offline Patrick Bateman  United States
diyAudio Member
 
Patrick Bateman's Avatar
 
Join Date: Oct 2006
Location: San Diego
Love it!

It reminds me of the Robin Christ waveguide that's one of the examples in ABEC:

Click the image to open in full size.
Robin Christ waveguide

"Unitized" Image Control Waveguide-f70e64cd-8665-443c-a7db-e0320f051cf7-jpg
Compact Unity Waveguide
  Reply With Quote
Old 12th June 2019, 06:10 PM   #165
Brinkman is offline Brinkman  United States
diyAudio Member
 
Join Date: Aug 2007
Location: Oakland, CA
"Unitized" Image Control Waveguide
What’s the intended -f3 for this project? It looks like the MCM 55-3669 might dig a little deeper...
  Reply With Quote
Old 12th June 2019, 06:17 PM   #166
LarryFunkster is offline LarryFunkster  Canada
diyAudio Member
 
Join Date: Jun 2019
Location: Manitoba
Quote:
Originally Posted by Brinkman View Post
First coat of paint after priming. This is pretty damn close to the finish one gets from a DIYSG SEOS waveguide.
Those look fantastic!!
  Reply With Quote
Old 12th June 2019, 07:33 PM   #167
Brinkman is offline Brinkman  United States
diyAudio Member
 
Join Date: Aug 2007
Location: Oakland, CA
"Unitized" Image Control Waveguide
Thank you! In my opinion, folks are a little too eager to go straight to bondo and HVLP without considering what can be accomplished with a bit of woodfiller and a some patience but then again, who am I to keep people from their toys?
  Reply With Quote
Old 14th June 2019, 12:12 AM   #168
Brinkman is offline Brinkman  United States
diyAudio Member
 
Join Date: Aug 2007
Location: Oakland, CA
"Unitized" Image Control Waveguide
Okay, finished painting the waveguides. This is after several light coats of nitrocellulose lacquer but before I get around to wet sanding this to level out the gloss:
Attached Images
File Type: jpg EA3B3487-DEF8-42D7-8A4A-CCF4423A7C62.jpg (1,008.3 KB, 97 views)
  Reply With Quote
Old Yesterday, 04:01 PM   #169
metzb1 is offline metzb1  United States
diyAudio Member
 
Join Date: Jul 2010
I've been wanting to build a Synergy or Unity project for quite some time, but the complexity combined with lack of sufficient time kept me from making reasonable headway. When the .stl of the March 8th waveguide was made available, I finally had a path forward.

Woofers are the Dayton TCP115-4 4-inchers, chosen for their small diameter and ability to belt out surprising amounts of bass for their size. They are inefficient, but four together seem a good match for the unity. The Daytons are in a QB3 reflex enclosure tuned to 48Hz and lightly filled with Acousta-stuff. The Unity is in it's own subenclosure and uses a 4-ohm version of the 2" Gento midrange, along with a SB19 tweeter. The tweeter uses a .4mH inductor and 6.2uF cap for a second-order crossover at around 3200Hz. The crossover between the woofers and Unity is at 650Hz, third order, via MiniDSP.

I finished these yesterday evening and haven't had much time to listen and get the kinks worked out. The most anomalous thing I've seen so far is a broad ~10dB peak at around 8kHz that I have treated with DSP (REW-generated biquad). I have some work to do on the response (using a MiniDSP HD), as the midbass also seems to be lacking (maybe too much Acousta-stuff?). I've probably made a mistake somewhere, as I was trying to get them finished quickly and get that first listen in before having to go back to work. So far, I can say they image precisely and have a lively sound, as horn-loaded drivers often do.

The waveguides were printed in blue PLA and took about 26 hours each (60mm/s IIRC). I didn't have any separation or other problems.

I wanted to thank "Patrick Bateman" for all of his work and for posting the .stl file for his unity waveguides, thus enabling me to finally build a unity project in the small amount of time I have available.
Attached Images
File Type: jpg Unity Gento SB19 TCP115-4 (1 of 1).jpg (625.9 KB, 58 views)
  Reply With Quote
Old Yesterday, 04:27 PM   #170
Patrick Bateman is offline Patrick Bateman  United States
diyAudio Member
 
Patrick Bateman's Avatar
 
Join Date: Oct 2006
Location: San Diego
Very cool!

I know what's causing the peak.

I'm in the car, I'll post the explanation later today.
  Reply With Quote

Reply


"Unitized" Image Control WaveguideHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Audio Control "ESP-2"/"The Epicenter" - Schematic wanted tiefbassuebertr Car Audio 9 22nd March 2019 02:20 AM
Oblate Spheroid + Image Control Waveguide + Everest DD5000 Patrick Bateman Multi-Way 6 6th November 2016 03:40 AM
My next project open baffle 4way (15" 12" 10" econo waveguide) help charlie2 Multi-Way 21 28th September 2015 05:25 PM


New To Site? Need Help?

All times are GMT. The time now is 09:50 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki