Waveguide adapter for XT25 and WG300, any interest? - 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 23rd August 2015, 08:48 PM   #1
timpert is offline timpert  Netherlands
diyAudio Member
 
Join Date: Nov 2004
Location: Netherlands
Default Waveguide adapter for XT25 and WG300, any interest?

Hello everyone,

After having received my XT25TG30 tweeters and Monacor WG300 waveguides, I started thinking about how to put the two together. I figured that an adapter flange would be the nicest way to do this, so I took my tweeters apart, measured them, and drew a flange in Freecad. I have attached two views of this flange.

Because the unit cost of CNC manufactured things goes down as numbers increase, I was wondering if more people than just me would like to have such a flange. If so, I could try to find a manufacturer and initiate a group buy.

Please do not PM me, but reply to this thread. Also, if you happen to know a manufacturer with good prices (preferably in the EU), let me know!

Cheers!
Attached Files
File Type: pdf XT25_wg300_front.pdf (50.3 KB, 90 views)
File Type: pdf XT25_wg300_rear.pdf (39.9 KB, 67 views)
  Reply With Quote
Old 24th August 2015, 01:51 AM   #2
TMM is offline TMM  Australia
diyAudio Member
 
Join Date: Sep 2007
Location: Australia
Send a message via AIM to TMM
Looks like something you could make with some patience and a router, no need for CNC.
  Reply With Quote
Old 24th August 2015, 09:56 AM   #3
timpert is offline timpert  Netherlands
diyAudio Member
 
Join Date: Nov 2004
Location: Netherlands
I don't think that anything that can be made with a router will provide the kind of fit that I am after. Most importantly, the "snout" at the back presses against the membrane edge (just like the original faceplate) and provides a 360 degrees pressure seal with the membrane. The throat of the waveguide is too rough, and the plastic is too flexible to reliably provide such a seal. So that's why I wanted a snout that perfectly matches the recess in the tweeter. The chamfer on the snout looks like it is 45 degrees, but it isn't, it is a tad steeper, and so it cannot be made accurately with a standard router bit.

The hole in the plate is another area that can't be made with a router. It isn't straight, it consists of two conical sections, of which the last one (the part ending in the snout) is dimensioned to provide a snug fit with the throat of the waveguide. In this way, a construction can be made that doesn't leak, without having to use glue.

Doing all this requires the use of a lathe and making the plate out of aluminum, because the snout would become too thin, fragile and incapable of making the desired seal when made out of wood.

It was my initial plan to turn them on my lathe, but then I figured that more people than just me might want such a plate. Would you still choose to muck with a router, if all the above can be had in a readily made, bolt-on solution and for a reasonable price?
  Reply With Quote
Old 26th August 2015, 03:55 AM   #4
diyAudio Member
 
Join Date: Jan 2013
Location: Washington, USA
Don't know if you know this, but the three screw holes that secure the faceplate to the tweeter-body on the XT25, are in the exact same location and serve the exact same purpose on a whole bunch of other Scanspeak tweeters. R2904/XXXX, D3004/XXXX, etc. etc. the list is really big.

So this adapter might be significantly more versatile than you think. I've done something similar with an SS waveguide that is pictured below. Shoutout to Xymox1 who shared this WG design with me.
Attached Images
File Type: jpg DSC_4125.jpg (444.6 KB, 160 views)
  Reply With Quote
Old 26th August 2015, 04:31 AM   #5
xrk971 is offline xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
Timpert,
Do you have an STL file? This can be 3d printed - looks not to complicated. I would make the waveguide smoother (more rounded edges rather than sharp eddge). It is a very minimal WG. Have you seen the big one Onni made?
  Reply With Quote
Old 26th August 2015, 08:42 AM   #6
timpert is offline timpert  Netherlands
diyAudio Member
 
Join Date: Nov 2004
Location: Netherlands
@ cocoapuffs: Yes, I know that more Tymphany and Scan Speak tweeters may fit. The plate is specific to the Monacor waveguide, as I don't hink there are others that fit. The Monacor waveguide is a proven one with the whole XT25 family of ring radiators (both Tymphany and SS), so I am actually a bit surprised that there is so little interest.

@ xrk971: 3D printing is a viable option that thus far never crossed my mind. Thanks for the tip, I will certainly look into it. The plate is only an adapter, it is designed to fit an existing (and rather affordable) waveguide, so my aim is to keep the adapter affordable as well.
  Reply With Quote
Old 26th August 2015, 09:21 AM   #7
diyAudio Member
 
giralfino's Avatar
 
Join Date: Feb 2009
I would make the adapter simpler, like this one (a simple disc with shaved holes, look at the last image): 7100-waveguide
Instead of making my sample with a router I could buy a couple of 3D printed items.

Ralf
  Reply With Quote
Old 26th August 2015, 09:34 AM   #8
timpert is offline timpert  Netherlands
diyAudio Member
 
Join Date: Nov 2004
Location: Netherlands
Also saw that page, but unfortunately, the waveguide throat doesn't fit into the faceplate of the XT25 when mounted like that. Perhaps the 7100 has a slightly larger aperture?
  Reply With Quote
Old 26th August 2015, 09:41 AM   #9
xrk971 is offline xrk971  United States
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Virginia
As long as 3d printing - print adapter and waveguide. Just need to model waveguide curve in 3d.

I often use plastic modeling clay to make temp waveguides. One could sculpt it and listen and measure. Once satisfied make either plaster of Paris or resin casting from sculpted model.
  Reply With Quote
Old 26th August 2015, 11:15 AM   #10
minkuni is offline minkuni  Norway
diyAudio Member
 
Join Date: Dec 2013
I used a 'quick and dirty' method and just filled up the area between the ridges on the rear side of the WG300 with liquid plastic used for sealing electronic circuits against water/shock/tampering.

Using screws with coarse threads and being careful not to overtighten the XT25 seemed to mount reasonably well with no further modifications to either driver or waveguide.

Not perfect by any means, but measured and sounded okay.
  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
8" Mid/Bass DT-300/WG300 russ.will Multi-Way 0 26th December 2014 11:51 PM
WTB BIII Adapter (Input U.FL Adapter) clsidxxl Swap Meet 0 23rd October 2014 05:05 PM
Waveguide for XT25 pjblakey Multi-Way 118 28th February 2014 11:01 PM
xt25 in 12in waveguide experiment MisterTwister Multi-Way 65 23rd July 2010 06:08 PM
interest checking,smt to pdip adapter boards digi01 Chip Amps 52 28th June 2006 09:10 PM


New To Site? Need Help?

All times are GMT. The time now is 06:35 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2