B&G RD-75 dipole - baffle and or waveguide? - Page 6 - diyAudio
Go Back   Home > Forums > Loudspeakers > Planars & Exotics

Planars & Exotics ESL's, planars, and alternative technologies

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 2012, 03:18 PM   #51
lolo is offline lolo  France
diyAudio Member
 
lolo's Avatar
 
Join Date: May 2010
Location: somewhere by the border..
I think it is a real shame not more people are interested/participating in this post, Stig Erik is really into something..
  Reply With Quote
Old 31st May 2012, 11:45 PM   #52
ntropy is offline ntropy  Switzerland
diyAudio Member
 
Join Date: Mar 2007
StigErik, do I understand your physical implementation of the RD-75 right: in the pictures where you show the curved edges it looks like you attached some chain on top of the unit. Did you just attach the other end of the chain to the ceiling or some frame?
  Reply With Quote
Old 1st June 2012, 10:11 AM   #53
diyAudio Member
 
StigErik's Avatar
 
Join Date: Feb 2008
Quote:
Originally Posted by ntropy View Post
StigErik, do I understand your physical implementation of the RD-75 right: in the pictures where you show the curved edges it looks like you attached some chain on top of the unit. Did you just attach the other end of the chain to the ceiling or some frame?
Yes I did. Its simply hung from a beam going across the room. The beam can be moved back and forth to make it easier to change the placement of the speaker. The chains are attached to a smaller piece of wood, that is easy to move across the beam, and it can be rotated for easy adjustments of toe-in angle. This is really very simple, I guess it took me less than half an hour to build it.

I have some more detailed pics below, taken before I put on the curved foam edges.
Attached Images
File Type: jpg RD-75-03.jpg (64.0 KB, 632 views)
File Type: jpg RD-75-04.jpg (93.9 KB, 607 views)
__________________
dipoles dipoles dipoles dipoles dipoles dipoles dipoles dipoles and dipoles
  Reply With Quote
Old 1st June 2012, 10:44 AM   #54
lolo is offline lolo  France
diyAudio Member
 
lolo's Avatar
 
Join Date: May 2010
Location: somewhere by the border..
Stig Erik,

I believe the RD75 has a fantastic impulse response, do you manage to keep that quality in the bass with the 4 subs? How did you place them, same distance and/or delayed? I can't make up the angle for the subs in front, do you seat right between them??

Last edited by lolo; 1st June 2012 at 10:51 AM.
  Reply With Quote
Old 1st June 2012, 02:03 PM   #55
diyAudio Member
 
StigErik's Avatar
 
Join Date: Feb 2008
See the pic below.

The woofer towers are delayed to get the same arrival time as the ribbon. Impulse response of this system is pretty clean if you ask me. Will try to find a measurement ... if I bothered to save any measurements....

This is NOT how the room looks now, but the speaker arrangement is the same.

Click the image to open in full size.
__________________
dipoles dipoles dipoles dipoles dipoles dipoles dipoles dipoles and dipoles

Last edited by StigErik; 1st June 2012 at 02:06 PM.
  Reply With Quote
Old 1st June 2012, 02:16 PM   #56
lolo is offline lolo  France
diyAudio Member
 
lolo's Avatar
 
Join Date: May 2010
Location: somewhere by the border..
thanks. 1.5m is close, and you absorb the rear wave.. that is give you a sort of "giant headphone" feeling with lips 2m large on female voices? I myself listen fairly close, around 2m from the dipoles. I do loose a little bit on pinpointing abilities but I am just drawn into the music, it's addictive! but I also have a recessed soundstage due to the Orions 3.1 revision.

Last edited by lolo; 1st June 2012 at 02:21 PM.
  Reply With Quote
Old 1st June 2012, 02:24 PM   #57
diyAudio Member
 
StigErik's Avatar
 
Join Date: Feb 2008
No, its not like headphones. Maybe when it comes to clarity and lack of coloration it is, but the soundstage is in front of you, and not inside your head like with headphones. You also loose the depth perspective with headphones, which is not lost here. With headphones there you can't feel the sound physically either, with my setup you can (if playing loud enough...).

Soundstage in my setup is spacious in depth and width, but also very precise. Pin-pointing can be ultra-sharp if the music is recorded that way.

And its very addictive to be kind of "transported" into the music and the acoustics of the recording. I wouldn't want to have it any other way than this!
__________________
dipoles dipoles dipoles dipoles dipoles dipoles dipoles dipoles and dipoles
  Reply With Quote
Old 1st June 2012, 02:29 PM   #58
lolo is offline lolo  France
diyAudio Member
 
lolo's Avatar
 
Join Date: May 2010
Location: somewhere by the border..
well, I really need to find that ticket!
  Reply With Quote
Old 1st June 2012, 06:53 PM   #59
diyAudio Member
 
StigErik's Avatar
 
Join Date: Feb 2008
I'd like to say a little more about my room acoustics ...

Some of the reason people love dipoles is that you can use the room reflections to create a very large and spacious soundstage. It can sound very cool I admit, but the problem with this approach is that different recordings will start to sound the same. What you hear is mainly the "signature" of your own room, and not so much the acoustics that is on your recordings.

I prefer to remove the listening room from my listening experience. A complete removal is not possible, but it is possible to bring the room reflections down to a level where they are inaudible with music signal. A very short listening distance and proper room treatment makes it possible to get room reflections 30 dB or more below the direct sound, which I have achieved.

What you get with this approach is the ability to hear everything that is on your records, and I mean everything. It's like being transported into the music rather than have the music appear in your room, if you get my analogy.

One guy that visited me, who is a classical musician and hifi-enthusiast, said he had never ever felt like actually being in the concert hall with a stereo system, but with mine he did. I think that's a very nice compliment!

I listen to all kinds of music, and I think that my approach to listening room acoustics pays justice to all music styles and types of recordings. I think its better to let everything come through rather than put an other layer of acoustics (the listening room) on top of everything.
__________________
dipoles dipoles dipoles dipoles dipoles dipoles dipoles dipoles and dipoles

Last edited by StigErik; 1st June 2012 at 06:55 PM.
  Reply With Quote
Old 1st June 2012, 07:13 PM   #60
lolo is offline lolo  France
diyAudio Member
 
lolo's Avatar
 
Join Date: May 2010
Location: somewhere by the border..
Stig Erik,

I agree to a certain point with your last post. But I also disagree. Dipoles do not all flatten out the record to a massively spread auditory scene, at least my Orions don't. When I listen to a rock record, or jazz, in a tight and dead space, I hear it, so do I hear the difference between the concertgebouw, and the scala.. maybe not to such extent to what you experience, but, the difference is very easy to spot, really obvious to anyone. At least for the ones properly recorded with only a few mics.
You made me even more curious now!
  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
Waveguide loaded MT dipole? mayhem13 Multi-Way 14 3rd August 2010 01:13 PM
OB MTM w/ Dipole Waveguide thadman Multi-Way 12 10th February 2010 07:56 PM
75 degree waveguide, any good reason? dantheman Multi-Way 16 3rd January 2010 03:52 AM
BG-75 / ATC planar dipole construction auplater Multi-Way 8 5th February 2007 02:00 AM
open baffle bass-dipole-what amp felixx Multi-Way 20 13th December 2006 06:53 AM


New To Site? Need Help?

All times are GMT. The time now is 05:13 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