Apollo Construction Diary Apollo Construction Diary - Page 61 - diyAudio
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

Apollo Construction Diary
Apollo Construction Diary
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 16th March 2013, 11:14 PM   #601
ShinOBIWAN is offline ShinOBIWAN  United Kingdom
diyAudio Member
 
ShinOBIWAN's Avatar
 
Join Date: Feb 2004
Location: UK
Fixed the errors in the waveguide.

Perfect fit now particularly around the throat where it meets with the dome. Measures arguably better than scanspeaks original faceplate. Displays similar characteristics to Seas DXT.

Apollo Construction Diary-baffle-insert-04-jpg

Apollo Construction Diary-baffle-insert-05-jpg

Apollo Construction Diary-baffle-insert-06-jpg

Apollo Construction Diary-baffle-insert-07-jpg

Apollo Construction Diary-baffle-insert-08-jpg
Attached Images
File Type: jpg Baffle Insert 04.jpg (159.4 KB, 1096 views)
File Type: jpg Baffle Insert 05.jpg (149.0 KB, 1061 views)
File Type: jpg Baffle Insert 06.jpg (144.0 KB, 1075 views)
File Type: jpg Baffle Insert 07.jpg (162.9 KB, 1072 views)
File Type: jpg Baffle Insert 08.jpg (161.1 KB, 1078 views)
__________________
The more you know who you are and what you want, the less things will ever be the same.
  Reply With Quote
Old 16th March 2013, 11:55 PM   #602
_henry_ is offline _henry_  Australia
diyAudio Member
 
Join Date: Jun 2002
Location: Australia
great looking as always.

have u played around the curve and depth of the waveguide before u made it? dave pellegrene did alot of experiment of all kinds of shape to xt19, hds and sb29. although it involves round and elliptical shapes, but he did mention some of the problems with the throat to the measurement (giving odd and irregular responses), but i can see it fits cleanly on yours

cheers
henry
henry
  Reply With Quote
Old 17th March 2013, 12:45 AM   #603
ShinOBIWAN is offline ShinOBIWAN  United Kingdom
diyAudio Member
 
ShinOBIWAN's Avatar
 
Join Date: Feb 2004
Location: UK
Quote:
Originally Posted by _henry_ View Post
great looking as always.

have u played around the curve and depth of the waveguide before u made it? dave pellegrene did alot of experiment of all kinds of shape to xt19, hds and sb29. although it involves round and elliptical shapes, but he did mention some of the problems with the throat to the measurement (giving odd and irregular responses), but i can see it fits cleanly on yours

cheers
henry
henry
Thanks Henry.

I've played somewhat with the waveguide shape in software but not done as much real world testing as I'd like. My observations have been that by far the most critical area is the throat interface with the dome. Even small changes here make big differences and if its flat out wrong like there's a gap between the dome and throat edge then the response is ragged and often horrible. The shape of the dome plays some role too. I have Scan 6600 with a rounded fabric dome as well as the same tweeter with the flatter beryllium dome and get quite different results.

Now that I have the throat dialled in I can go ahead and start trying out some of the other profiles I have.
__________________
The more you know who you are and what you want, the less things will ever be the same.
  Reply With Quote
Old 17th March 2013, 01:27 AM   #604
5th element is offline 5th element  United Kingdom
diyAudio Member
 
5th element's Avatar
 
Join Date: Oct 2002
Location: England
By the looks of those, you could probably make a few extra bucks on the side just by selling wave-guides of various sizes!
__________________
What the hell are you screamin' for? Every five minutes there's a bomb or somethin'! I'm leavin! bzzzz! Now with website! www.5een.co.uk under construction.
  Reply With Quote
Old 17th March 2013, 01:31 AM   #605
cersepn is offline cersepn  United States
diyAudio Member
 
Join Date: Feb 2010
Amazing work, ShinOBIWAN . Thanks for documenting your journey, the pictures are great and i always look forward to seeing more updates. You do such great DIY!
  Reply With Quote
Old 17th March 2013, 10:33 PM   #606
davewantsmoore is offline davewantsmoore  Australia
diyAudio Member
 
Join Date: Sep 2009
Location: Australia
Quote:
Originally Posted by _henry_ View Post
dave pellegrene did alot of experiment of all kinds of shape to xt19, hds and sb29. although it involves round and elliptical shapes, but he did mention some of the problems with the throat to the measurement (giving odd and irregular responses), but i can see it fits cleanly on yours
I've got a batch of different small waveguides designed by DP... There is a very large difference in the top octave response caused by the throat matching. Some guides which actually cover over the surround of the tweeter have a very very good response, which surprised me a lot.

Loving the pics Ant. Thanks for posting.
  Reply With Quote
Old 17th March 2013, 10:45 PM   #607
ScottG is offline ScottG  United States
diyAudio Member
 
Join Date: Feb 2003
Location: US
Quote:
Originally Posted by ShinOBIWAN View Post
..Fixed the errors in the waveguide.

Perfect fit now particularly around the throat where it meets with the dome..

Apollo Construction Diary-baffle-insert-08-jpg
__________________
perspective is everything
  Reply With Quote
Old 9th April 2013, 05:23 PM   #608
Tigerpolis is offline Tigerpolis  Sweden
diyAudio Member
 
Join Date: May 2010
Any progress ?
  Reply With Quote
Old 10th April 2013, 01:49 AM   #609
ShinOBIWAN is offline ShinOBIWAN  United Kingdom
diyAudio Member
 
ShinOBIWAN's Avatar
 
Join Date: Feb 2004
Location: UK
Some progress yes but its mostly mundane stuff like lining the internals with lead, stuffing, cabling, connectors and that sort of thing.

I'm cutting some more parts this week and will update.
__________________
The more you know who you are and what you want, the less things will ever be the same.
  Reply With Quote
Old 10th April 2013, 08:38 PM   #610
ShinOBIWAN is offline ShinOBIWAN  United Kingdom
diyAudio Member
 
ShinOBIWAN's Avatar
 
Join Date: Feb 2004
Location: UK
More pics

The foot that the cabinets sit on. Nice and strong too so as to hold the considerable weight.
Apollo Construction Diary-apollo21-jpg

Waveguides for tweeters:
Apollo Construction Diary-apollo22-jpg

Apollo Construction Diary-apollo23-jpg

Spacers for the subs to mount against when coupling them together for out of phase mechanical cancellation. More on this soon.
Apollo Construction Diary-apollo24-jpg
Attached Images
File Type: jpg Apollo21.jpg (131.9 KB, 704 views)
File Type: jpg Apollo22.jpg (99.7 KB, 695 views)
File Type: jpg Apollo23.jpg (85.1 KB, 697 views)
File Type: jpg Apollo24.jpg (133.4 KB, 702 views)
__________________
The more you know who you are and what you want, the less things will ever be the same.
  Reply With Quote

Reply


Apollo Construction DiaryHide 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


New To Site? Need Help?

All times are GMT. The time now is 10:54 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio
Wiki