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

Open source Waveguides for CNC & 3D printing!
Open source Waveguides for CNC & 3D printing!
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 5th April 2019, 03:44 AM   #331
augerpro is offline augerpro  United States
diyAudio Member
 
Join Date: Aug 2006
Played with some Scanspeak tweeters! I measured four designs. One 5" that is basically the same as other 5" ellipticals in this thread. A 5" that has uses a 1:.80 aspect ratio. A 6" that is basically a scaled up version of the 5" ellipticals. And the Visiton WG148.

Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

The 5" results:
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

The 6":

Click the image to open in full size.
Click the image to open in full size.

And the Visiton WG148:

Click the image to open in full size.
Click the image to open in full size.

Here are pics of how I mated to the WG148. Used some bluetac to fill in gaps and seal around the interface. I don't how I could improve the situation any further.

Click the image to open in full size.
__________________
~Brandon
Please help my waveguide and box construction research by donating to my gofundme via my website:Soma Sonus

Last edited by augerpro; 5th April 2019 at 03:50 AM.
  Reply With Quote
Old 5th April 2019, 04:02 AM   #332
augerpro is offline augerpro  United States
diyAudio Member
 
Join Date: Aug 2006
The design files:

Dropbox - 6x1 A SS.stl
Dropbox - 6x1 A SS .step
Dropbox - 5x.75 A SS.stl
Dropbox - 5x.75 A SS.step
Dropbox - 5x.75 B SS.step
https://www.dropbox.com/s/qzpq1jc3p2...%20SS.stl?dl=0
__________________
~Brandon
Please help my waveguide and box construction research by donating to my gofundme via my website:Soma Sonus
  Reply With Quote
Old 5th April 2019, 04:46 PM   #333
mbrennwa is offline mbrennwa  Switzerland
diyAudio Member
 
mbrennwa's Avatar
 
Join Date: Mar 2005
Location: Zurich, Switzerland
Open source Waveguides for CNC & 3D printing!
Thank you Brandon! These look rather nice! What drive voltage did you use for those measurement (I am trying to understand the SPL gain involved with these waveguides)?
  Reply With Quote
Old 5th April 2019, 05:42 PM   #334
augerpro is offline augerpro  United States
diyAudio Member
 
Join Date: Aug 2006
I'm not sure what voltage I used, but they have been calibrated to be correct +/- 1 dB at 2.83V.
__________________
~Brandon
Please help my waveguide and box construction research by donating to my gofundme via my website:Soma Sonus
  Reply With Quote
Old 5th April 2019, 06:50 PM   #335
Arnandsway is offline Arnandsway  Netherlands
diyAudio Member
 
Join Date: Nov 2018
I'm alsoy trying to figure this out because tehe SB26ADC measurements show now a lower sensitivity than without a WG. Could it be because of a lower voltage?
  Reply With Quote
Old 5th April 2019, 07:31 PM   #336
augerpro is offline augerpro  United States
diyAudio Member
 
Join Date: Aug 2006
Where are you seeing this? For this run of tests, I was only able to calibrate the SPL "through the side door". Basically take a known tweeter, measure it and set the levels so that it matches factory spec. Then other measurements should be correct too, but there is some eyeballing with that original measurement. When I get my permanent setup rebuilt now that I'm back in a house, I'll redo the calibration based off a voltage.
__________________
~Brandon
Please help my waveguide and box construction research by donating to my gofundme via my website:Soma Sonus
  Reply With Quote
Old 5th April 2019, 07:39 PM   #337
Arnandsway is offline Arnandsway  Netherlands
diyAudio Member
 
Join Date: Nov 2018
Awesome to hear. Thanks for all the hard work.

On page 30 I see that the sensitivity does not really reach 90 dB, with the 5" WG.
  Reply With Quote
Old 6th April 2019, 07:33 AM   #338
mbrennwa is offline mbrennwa  Switzerland
diyAudio Member
 
mbrennwa's Avatar
 
Join Date: Mar 2005
Location: Zurich, Switzerland
Open source Waveguides for CNC & 3D printing!
Quote:
Originally Posted by augerpro View Post
Played with some Scanspeak tweeters ...
Here are pics of how I mated to the WG148. Used some bluetac to fill in gaps and seal around the interface. I don't how I could improve the situation any further.

Click the image to open in full size.
The WG148 needs some machining to fit the Scan R2904 and D6600. The Blue Tack probably gives an air-tight seal, but you won't get a nice fit of the throat to the point where the dome / ring membrane is fixed to the tweeter assembly. I'd guess the rather poor response curves you got the from WG148 are the result of this. Also take a look at this, which allowed me to get a much smoother SPL response with the WG148.
  Reply With Quote
Old 6th April 2019, 08:37 AM   #339
augerpro is offline augerpro  United States
diyAudio Member
 
Join Date: Aug 2006
Makes sense that milling the WG148 down made for better response. You could nestle that tweeter in more with no gap around the diaphragm. Without doing that I knew the response wouldn't be that good because the throat interface just looked poor to me.
__________________
~Brandon
Please help my waveguide and box construction research by donating to my gofundme via my website:Soma Sonus
  Reply With Quote
Old 6th April 2019, 08:34 PM   #340
mbrennwa is offline mbrennwa  Switzerland
diyAudio Member
 
mbrennwa's Avatar
 
Join Date: Mar 2005
Location: Zurich, Switzerland
Open source Waveguides for CNC & 3D printing!
I am considering ordering a batch of the ScanSpeak 5" version A, made on a CNC machine from aluminium, black anodized. These would fit the ScanSpeak D3004/66x0 (textile and beryllium domes), the R2904 ring radiators and most likely also the R3004 ring radiator (just replace their stock face plate by the waveguide). The waveguides might possibly also fit some of the other ScanSpeak tweeters, but I have no clue what these tweeters look like when their face plate is removed.

Getting more than just a single pair for me would get the price down quite a bit. Anyone interested?
  Reply With Quote

Reply


Open source Waveguides for CNC & 3D printing!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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
[Open source] TINA The total open source Audiophile Player based on Beaglebone Black DragonWar PC Based 7 18th December 2016 02:31 PM
Ultimate Open Source XMOS USB-I2S: The source to end all sources. krfkeith Digital Source 4 14th June 2013 03:54 PM
Volume / Source selector - open source project ? AuroraB Analog Line Level 22 22nd September 2012 02:21 PM
Open call for suggestions on Open Source DIY Audio Design gfergy Everything Else 1 15th April 2007 07:33 AM
UK source for Waveguides for tweeter (or how do DIY one)? Puggie Multi-Way 3 22nd June 2005 04:55 PM


New To Site? Need Help?

All times are GMT. The time now is 01:26 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki