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 16th August 2010, 02:23 AM   #7191
Pano is offline Pano  United States
diyAudio Moderator
 
Pano's Avatar
 
Join Date: Oct 2004
Location: Milliways
Blog Entries: 4
Interesting. I have a buddy on Maui who bought Arum Cantus tweeters to augment his P.Audio 12" coax drivers on OB (IB subs) He is very, very happy with them.
__________________
Take the Speaker Voltage Test!
  Reply With Quote
Old 16th August 2010, 06:02 AM   #7192
g3dahl is offline g3dahl  United States
diyAudio Member
 
g3dahl's Avatar
 
Join Date: Jun 2004
Location: Silverdale, WA
Here's the impedance/phase plot for the Radian 745-8PB on the Azurahorn AH-425:

Click the image to open in full size.

Gary Dahl
__________________
"So many tubes, so little time..."
  Reply With Quote
Old 16th August 2010, 06:24 AM   #7193
diyAudio Member
 
dantheman's Avatar
 
Join Date: May 2008
Location: Mountain View, CA
Cool Gary. You wouldn't happen to want to post the impulse response for the Radian/Azura would you? It might be cool to see what everyone comes up with. Looks like the crossover will be relatively simple for a CD/15" MW. Nice driver selection!

Dan
__________________
My Blog
My Music Recordings
  Reply With Quote
Old 16th August 2010, 07:02 AM   #7194
CLS is offline CLS  Taiwan
diyAudio Member
 
Join Date: Jun 2005
Location: Taiwan
Just curious.

Can Radian 745-8PB (w/ Azurahorn AH-425) work with the rear cover removed? Or, how well can it operate like that?

Would it be possible to analyse theose peaks on the impedance sweep (and the effects on performace)? What would be the possible reasons for that one on 1.2kHz? Phase plug or read chamber?

I haven't seen many CD measurements, but I guess the HF behavior of this big guy must be very good.
  Reply With Quote
Old 16th August 2010, 06:03 PM   #7195
g3dahl is offline g3dahl  United States
diyAudio Member
 
g3dahl's Avatar
 
Join Date: Jun 2004
Location: Silverdale, WA
I set up for measuring the impulse response of the Radian/Azurahorn combo. Distance is 1.5 meters. I have attached the corresponding files in .pir and .wav formats. Vertical scale is arbitrary; the gain of my power amp hasn't been accounted for. The mic preamp doesn't invert phase, so it's probably the power amp, a Parasound HCA-1500A.

The Radian drivers are Lynn's, so I'm not going to open them up unless he wants me to.

Here's the IR for the Radian 745PB-8 at 1.5 m:

Click the image to open in full size.

Here's the FR from the same setup:

Click the image to open in full size.

Gary Dahl
Attached Files
File Type: zip Archive.zip (153.3 KB, 17 views)
__________________
"So many tubes, so little time..."
  Reply With Quote
Old 16th August 2010, 06:21 PM   #7196
doug20 is offline doug20  United States
diyAudio Member
 
Join Date: Mar 2009
Quote:
Originally Posted by g3dahl View Post
Picture time!

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.


Im impressed!!! Very well done! Any XO info?
  Reply With Quote
Old 16th August 2010, 06:42 PM   #7197
g3dahl is offline g3dahl  United States
diyAudio Member
 
g3dahl's Avatar
 
Join Date: Jun 2004
Location: Silverdale, WA
Thanks Doug!

Crossovers don't exist yet. Bass cabinet (PR-loaded TD15H) will be powered by a plate amp. TD15M, Radian 745 and G3 ribbon will be passively crossed over at ~600-800 Hz and ~8 kHz. Attenuation for the Radian will be carried out using an autoformer.

Just managed to complete impedance curves, so crossover design is the next step. Anyone wanna help?

Gary Dahl
__________________
"So many tubes, so little time..."
  Reply With Quote
Old 16th August 2010, 06:46 PM   #7198
diyAudio Member
 
Join Date: Sep 2002
Location: Oregon, USA
I could try if you were using a DCX2496. I'm no good at passive crossovers
  Reply With Quote
Old 16th August 2010, 08:02 PM   #7199
Elias is offline Elias  Finland
diyAudio Member
 
Elias's Avatar
 
Join Date: May 2003
Location: Where you live
Hi,

I plotted some wavelets from the RAdian/Azurahorn IR file.

Here's a 'CSD' equivalent wavelet:
Click the image to open in full size.


Here's amplitude normalised to see better the temporal effects:
Click the image to open in full size.

Above 8kHz it's crap.


Here's constant Q transform, and it's reassignment:
Click the image to open in full size.

Can I see consecutive reflections/diffractions? Either the driver, or the throat-mouth ping-pong?


- Elias


Quote:
Originally Posted by g3dahl View Post
I set up for measuring the impulse response of the Radian/Azurahorn combo. Distance is 1.5 meters. I have attached the corresponding files in .pir and .wav formats. Vertical scale is arbitrary; the gain of my power amp hasn't been accounted for. The mic preamp doesn't invert phase, so it's probably the power amp, a Parasound HCA-1500A.

The Radian drivers are Lynn's, so I'm not going to open them up unless he wants me to.

Here's the IR for the Radian 745PB-8 at 1.5 m:
  Reply With Quote
Old 16th August 2010, 08:06 PM   #7200
g3dahl is offline g3dahl  United States
diyAudio Member
 
g3dahl's Avatar
 
Join Date: Jun 2004
Location: Silverdale, WA
Above 8 kHz looked like crap on the arta csd too, but on your graph it actually looks kinda pretty!

Gary Dahl
__________________
"So many tubes, so little time..."
  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



New To Site? Need Help?

All times are GMT. The time now is 03:58 AM.


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