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

W20RC38 / Morel CAT 298 [or MDT 28]
W20RC38 / Morel CAT 298 [or MDT 28]
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 26th March 2020, 04:56 PM   #11
ODougbo is offline ODougbo  United States
diyAudio Member
 
Join Date: Aug 2011
Location: Maryland USA
Talking Just another 2-way

Well was side tracked a bit but assembled/tested the xo from the last post.
I think its fine and on the 1st attempt (lol after many, many other dud speaker projects)

Thinking the morels I have laying around are mismatched, but the xo was wrong anyway.
Attached Images
File Type: png Untitled.png (168.1 KB, 30 views)
File Type: png SF SB test xo.png (91.0 KB, 30 views)
  Reply With Quote
Old 26th March 2020, 05:15 PM   #12
system7 is offline system7  United Kingdom
diyAudio Member
 
system7's Avatar
 
Join Date: Aug 2008
Location: Portsmouth UK
IIRC, Morel tweeters need some unsoldering to sort out any dried-up ferrofluid. Which just turns to sticky sludge after many years. Killing the output.

But I would be checking them for that if ancient.

I'm having a good time with my current effort:

Click the image to open in full size.

Click the image to open in full size.

I ditched the 0.47uF/22R tank notch. They are a dubious fix IMO.

I don't see much wrong with the bass filter for your flutes with the LCR notch.

What transforms the speakers is a grille cloth, IMO.

May my problem be diffraction?-morel-ma-bathrobe-im000890-jpg

The ancients used to use some cloth with a bit of spongey foam added. Maybe they knew something. The return of the smooth!
__________________
Best Regards from Steve in Portsmouth, UK.
  Reply With Quote
Old 28th March 2020, 09:10 AM   #13
ODougbo is offline ODougbo  United States
diyAudio Member
 
Join Date: Aug 2011
Location: Maryland USA
Thanks for the morel tips and your design, never would have thought to do a complete over-haul, unsoldering and then cleaning. I'll have to make a board with cutouts and attach a few for testing, to check for a matching pair.

I remember back buying all these morels, most sounded clear as a whistle, whereas a small percentage had a secondary tone/buzz. Never did figure that out.

[Replacement VC's are available for $27]

**
W20RC38/8 and SB29RDC Budget Build
Another marathon day yesterday, complete overhaul of the gray-primer mdf boxes: replaced the tweeters, added bracing, retrofitted the xo's and tested.
The 8" woofer is musical and has wonderful bass (with the PE P-core baffle step coil). Used a 6.8ohm resistor for the tweeter.

Both speakers here:

W20RC38 8 3~28.png


Checking out the CDs - nice!

Last edited by ODougbo; 28th March 2020 at 09:15 AM.
  Reply With Quote

Reply


W20RC38 / Morel CAT 298 [or MDT 28]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
FRD/ZMA files for Silver Flute W20RC38 and Fountek FR89EX wlg Software Tools 1 15th October 2018 04:56 AM
Yet another Morel MTM but with another M in between ingvar ahlberg Multi-Way 0 19th August 2013 09:22 PM
WTB: Morel MDT-20 matevana Swap Meet 0 22nd August 2010 05:16 PM
WTB Silver Flute W20RC38-4 jotom750 Swap Meet 0 11th March 2010 10:33 AM
WTB --- Morel MDT-29 coffin Swap Meet 0 5th August 2004 02:12 AM


New To Site? Need Help?

All times are GMT. The time now is 11:49 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki