Critical Midhorn Build - Page 2 - 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 7th September 2010, 07:23 PM   #11
diyAudio Member
 
Join Date: Jul 2008
Quote:
Originally Posted by SunRa View Post
Hello, I have a comment regarding the bass/mid. Seeing a 18" waveguide near 10" just doesn;t seem right... Only if you use many of them..
Im looking at the 350hz jmlc horn, so this is a even bigger 60cm horn.

I would love to have a 15" bass driver, but the WAF comes into play here and she says no. I can get away with a pair of 10's maby 12's if im lucky, but thats it.
Looking somthing like this-
Google Image Result for http://www.itechnews.net/wp-content/uploads/2010/01/Avantgarde-Acoustics-G2-Series-Speakers.jpg


Quote:
TrueSound The Radian 850 will not be usable in a 350 Hz horn below around 800 Hz. You should find a more suitable driver like a 4" with a phenolic diaphragm like the JBL 2285 if you want to go down to 500. You should also look for a much larger horn if you expect good response to 400.
The JMLC 350hz horn is only usable down to 700hz or so anyway, so theres no need to necessarily have a response to 500hz. I dont know about using 4" compression drivers- I havent heard of anyone using them.-google search didnt turn up anything for a 2285 driver. -If you were suggesting somthing like a 2450, its out of my budget im afraid.

scottg- I plan to get a demo of the advantgarde acoustics speakers soon to re affirm my feelings on the sound- thankyou for the detailed advice.- as you can see from my earlyer statement, im going for a jmlc horn with the roundover exit for aesthetic reasons, so thats set. At this point, I just need to make a decision on the driver sise and the consequences - ie-3 way or 2. Either way, I would like to use a driver that gets good subjective press, asside from good measured results. Ive heard the 18sound is good, but many have sung the praise of the radian aswell from what i can gather, and that 18sounds units is rather spendy!
  Reply With Quote
Old 7th September 2010, 09:51 PM   #12
ScottG is offline ScottG  United States
diyAudio Member
 
Join Date: Feb 2003
Location: US
Quote:
Originally Posted by lbstyling View Post

..The JMLC 350hz horn is only usable down to 700hz or so anyway, so theres no need to necessarily have a response to 500hz.

I dont know about using 4" compression drivers- I havent heard of anyone using them.-google search didnt turn up anything for a 2285 driver. -If you were suggesting somthing like a 2450, its out of my budget im afraid.

scottg- I plan to get a demo of the advantgarde acoustics speakers soon to re affirm my feelings on the sound- thankyou for the detailed advice.- as you can see from my earlyer statement, im going for a jmlc horn with the roundover exit for aesthetic reasons, so thats set. At this point, I just need to make a decision on the driver sise and the consequences - ie-3 way or 2. Either way, I would like to use a driver that gets good subjective press, asside from good measured results. Ive heard the 18sound is good, but many have sung the praise of the radian aswell from what i can gather, and that 18sounds units is rather spendy!

Active or Passive filter?

A 350 Hz JMMLC (depending on high-pass filter), could do 500 Hz.

Because you are looking at midrange only and you want to keep it less expensive, this is the driver I'd recommend:

http://www.critesspeakers.com/D405.pdf
Selenium Products | Critesspeakers.com

(I'd wager it sounds better than the Radian at mid freq.s once it's "broken in".)

BTW, on standard compression drivers the VC diameter pretty much tells you the diaphragm diameter.. so this would be a "4 inch" driver. The Radian 850PB is a "3 inch" driver. Of course both the exit's are 2".

For your treble compression driver look to:
Celestion CDX1-1425 - drivervault

Note: for increased dispersion pattern (and a more uniform one), at higher freq.s I'd recommend a modest size OS profile for your treble unit. That would sound different than the AG horns.
__________________
perspective is everything

Last edited by ScottG; 7th September 2010 at 09:58 PM.
  Reply With Quote
Old 7th September 2010, 10:15 PM   #13
ra7 is offline ra7  United States
diyAudio Member
 
Join Date: Feb 2009
Blog Entries: 1
I'm begining to look at something similar as an approach to loudspeakears. Combining a high quality woofer from 80-100hz to about 500-700 hz and a CD above that.

Scott, would the D220ti be your suggestion for getting my feet wet in the realm of horns and CDs? Which horn/WG would you suggest for going with the D220ti you linked above? Again, I'm looking at this as a starting point and want to keep spending at a minimum.
  Reply With Quote
Old 7th September 2010, 10:45 PM   #14
doug20 is offline doug20  United States
diyAudio Member
 
Join Date: Mar 2009
If spending is a minimum then look at the QSC HPR-152i waveguide (rectangle 10"x14") or the QSC HPR-122i round 10" waveguide.

The celestion 1745 is a good driver to match with either, it will play lower then the Celestion 1425. Those waveguides accept bolt on CDs so if you are considering the D220ti, get the bolt on version.
  Reply With Quote
Old 7th September 2010, 10:51 PM   #15
ScottG is offline ScottG  United States
diyAudio Member
 
Join Date: Feb 2003
Location: US
Quote:
Originally Posted by ra7 View Post
Which horn/WG would you suggest for going with the D220ti you linked above? Again, I'm looking at this as a starting point and want to keep spending at a minimum.
That celestion QSC combination.. (NOT the D220ti. The difference in price is about 22 US each.)

Celestion CDX1-1425 - drivervault

Spend less and you can get a lot less value. Spend more and you won't get much more value.

A picture of the horn:
http://s139.photobucket.com/albums/q..._000446_GP.jpg


EDIT:..or you know, what Doug said..
__________________
perspective is everything

Last edited by ScottG; 7th September 2010 at 11:10 PM.
  Reply With Quote
Old 8th September 2010, 02:35 AM   #16
doug20 is offline doug20  United States
diyAudio Member
 
Join Date: Mar 2009
I would definitely look at the Celestion 1745 instead of the 1425 if you need to have an XO below 2KHz.
  Reply With Quote
Old 8th September 2010, 02:44 AM   #17
ra7 is offline ra7  United States
diyAudio Member
 
Join Date: Feb 2009
Blog Entries: 1
Thanks for the help Doug and Scott!

How low do you think I can go with Celestion 1745 and the HPR122i waveguide combo?
I'm really looking at crossing near 500-700 Hz, not the usual 1kHz and up. I know that there are a lot of choices if the crossover point is raised above 1kHz.

Again, all the help is really appreciated!
  Reply With Quote
Old 8th September 2010, 02:46 AM   #18
doug20 is offline doug20  United States
diyAudio Member
 
Join Date: Mar 2009
I guess I missed the part about the 500-700Hz XO for this driver...I think we started to mix up the "treble driver" discussion with your mid bass horn needs. Sorry about that.

The 10" waveguide is too small to cross that low to start with and the 1745 wouldnt crossover below 1KHz either.


For a 500Hz XO, you need a horn/waveguide that is much, much larger, probably 18" or greater. The Lower you want to go with a horn the bigger it has to be. Then you also will need larger Compression Drivers.
  Reply With Quote
Old 8th September 2010, 02:55 AM   #19
ra7 is offline ra7  United States
diyAudio Member
 
Join Date: Feb 2009
Blog Entries: 1
That's more in line with what I've been reading. Thanks doug!

Any suggestions, for driver+horns... cheaply available. I'm guessing not, but worth asking.

I've seen the stereo lab horns, seems like the cheapest option next to building your own. Of course, I'm trying to get a feel for the horn+CD sound before going all out.
  Reply With Quote
Old 8th September 2010, 02:57 AM   #20
doug20 is offline doug20  United States
diyAudio Member
 
Join Date: Mar 2009
Sorry, I do not know of any cheap larger horn choices other then reading about others finding used JBL horns.
  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
square tractrix midhorn vs circular? pumpkin1 Multi-Way 10 12th August 2010 03:15 AM
Critical resistors Baard Tubes / Valves 5 28th March 2005 10:26 PM
Critical Q Subwoofer Cruiser Subwoofers 11 2nd December 2004 09:42 PM
Midhorn for JBL2123? electroaudio Multi-Way 5 13th April 2004 01:29 PM
Critical Q redux Dave Jones Multi-Way 18 20th February 2004 10:09 PM


New To Site? Need Help?

All times are GMT. The time now is 07:46 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2