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

MTM with TC9fd
MTM with TC9fd
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 31st May 2017, 02:12 PM   #1
adason is offline adason  United States
diyAudio Member
 
adason's Avatar
 
Join Date: Nov 2004
Location: Maryland
Default MTM with TC9fd

here is just a suggestion, an alternative to Nola Brio Trio, or Mini Karlsonator with Dual TC9fd-18-08...

I built NOLA Brio Trio, just in foam core, and just for fun. While it played ok with the sub, ultimately, I did not like two things:
first, two tweeters in a sense, as one is run fullrange, one with high pass, still, both project heights...I do not like that
second, while TC9fd is performing well in midrange area, and may be extended to the heights, when it comes to of axis, it starts beaming terribly from about 5kHz. Just look at of axis response.

So I converted Nola Brio Trio to typical MTM with small Dayton dome. Quick and dirty crossover, measurement and listening lead to an amazing sounding neutral speaker. I have not saved the measurements, but it was exceptionally flat. I may redo the measurements once I paint the foam core.
If you need HiFi bookshelf, built this one...
If you run it from 150Hz with sub, you will love it.
Attached Images
File Type: png TC9fd MTM.png (12.6 KB, 2009 views)
  Reply With Quote
Old 31st May 2017, 11:10 PM   #2
Jim Griffin is offline Jim Griffin  United States
diyAudio Member
 
Join Date: Jun 2003
Location: Tennessee
Good thinking for your revised design.

Are you still using open backs for your TC9fd drivers or did you mount them in boxes?
  Reply With Quote
Old 1st June 2017, 12:33 PM   #3
adason is offline adason  United States
diyAudio Member
 
adason's Avatar
 
Join Date: Nov 2004
Location: Maryland
Open back, correct, I only run it from ~150Hz.
They measure flat starting from 100Hz up.
  Reply With Quote
Old 1st June 2017, 05:12 PM   #4
kec is offline kec  United States
diyAudio Member
 
kec's Avatar
 
Join Date: Mar 2001
Location: SoCal
This is interesting as I just finished the Nola Brio prototype. I agree with you about the beaming off axis. I may have to try this. Are the drivers mounted as close as possible? Which Dayton dome?
__________________
Former Altec Employee ('78-'82)
  Reply With Quote
Old 1st June 2017, 05:39 PM   #5
DPH is offline DPH  United States
diyAudio Member
 
Join Date: Dec 2008
Location: West Coast USA (somewhere)
How are you not getting huge comb filtering with such a small MTM? Wouldn't it be prudent to re-structure it as a 2.5-way where you bring in the second TC9 below the 1/4 wavelength spacing?
__________________
Happy DIYing, Daniel
  Reply With Quote
Old 1st June 2017, 05:54 PM   #6
adason is offline adason  United States
diyAudio Member
 
adason's Avatar
 
Join Date: Nov 2004
Location: Maryland
Which Dayton dome?

ND20FB-4
  Reply With Quote
Old 1st June 2017, 05:56 PM   #7
adason is offline adason  United States
diyAudio Member
 
adason's Avatar
 
Join Date: Nov 2004
Location: Maryland
Quote:
Originally Posted by DPH View Post
How are you not getting huge comb filtering with such a small MTM? Wouldn't it be prudent to re-structure it as a 2.5-way where you bring in the second TC9 below the 1/4 wavelength spacing?
I will post some measurements...I see non what you are saying.
Feel free to make my version, measure it, then convert it to 2.5 way, re-measure it, and post the results. Should be interesting.
  Reply With Quote
Old 1st June 2017, 05:59 PM   #8
adason is offline adason  United States
diyAudio Member
 
adason's Avatar
 
Join Date: Nov 2004
Location: Maryland
Btw...I will take picture of actual speakers, I placed TC9's very close to each other, since the tweeter is really tiny.

Btw2...if the comb filtering issue be there, should not that be applicable to Nola Brio Trio mainly? Think about it...
  Reply With Quote
Old 1st June 2017, 06:02 PM   #9
DPH is offline DPH  United States
diyAudio Member
 
Join Date: Dec 2008
Location: West Coast USA (somewhere)
Sorry, I think my message came across more inflammatory than I meant, I was more surprised than anything. Not sure about the NOLA at all, I just looked at the title and went from there.
__________________
Happy DIYing, Daniel
  Reply With Quote
Old 1st June 2017, 06:39 PM   #10
Audio Elite is offline Audio Elite  South Africa
diyAudio Member
 
Join Date: Sep 2007
Quote:
Originally Posted by adason View Post
Btw...I will take picture of actual speakers, I placed TC9's very close to each other, since the tweeter is really tiny.

Btw2...if the comb filtering issue be there, should not that be applicable to Nola Brio Trio mainly? Think about it...
Please post some pictures. What a great concept and bet it sounds better than the Nola's
  Reply With Quote

Reply


MTM with TC9fdHide 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
Mini Karlsonator (0.53X) with Dual TC9FD's xrk971 Full Range 3674 19th February 2020 01:47 PM
MLTL using TC9FD and Pro audio 8? Jerms Full Range 13 9th September 2016 07:48 PM
Sensitivity: Vifa TC9FD vs. Faital 3FE22 cgallery Full Range 3 21st March 2015 06:12 PM
Vifa TC9FD connects Arron Full Range 2 1st October 2014 03:42 AM
Any ideas for the VIFA TC9FD-18-08 WrineX Full Range 19 5th March 2012 01:57 PM


New To Site? Need Help?

All times are GMT. The time now is 07:25 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