Question regarding the B&G RD75's - 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 14th September 2013, 04:33 PM   #1
pk is offline pk  Denmark
diyAudio Member
 
Join Date: Apr 2003
Location: Aarhus, Denmark
Default Question regarding the B&G RD75's

I have heard truly great reviews abou the B&G RD75 planers and have seriously considered going for these. However, now and then I would like to be able to play loud and I am somewhat sceptical towards their output capabilities. Hence this crazy (and expensive) idea:

Would it be possible to use 2, 3, or 4 pcs per side mounted just next to each other without compromising the sound?

I would imagine that lobing might be an issue, but then I saw that Wisdom Audio seem to use 3 units next to each other in their Wisdom Infinity series


High performance in-wall and on-wall architectural products and subwoofers with Audyssey Room Correction - Wisdom Audio

What do you guys think?

Thanks a lot!

Best regards
Peter

Last edited by pk; 14th September 2013 at 04:34 PM. Reason: typo
  Reply With Quote
Old 15th September 2013, 04:12 PM   #2
WrineX is offline WrineX  Netherlands
diyAudio Member
 
WrineX's Avatar
 
Join Date: Mar 2004
Location: Den Haag
its not verry usefull to put them besides eachother, it will screw up ur dispersion i believe. and you get a narow sweet spot. tha gain is also limited ,, addig few hundred dollars to gain 3 dB? or put them paralel to gain 6 , but you amp wont like that i think.

i really woudl suggest not to sped so much money on them if you just want it to go loud. i recon they play really loud as they are.
  Reply With Quote
Old 15th September 2013, 08:51 PM   #3
diyAudio Member
 
StigErik's Avatar
 
Join Date: Feb 2008
How loud do you want to play, and at what distance?

Using several drivers is not very effective, and will screw up the dispersion horizontally. Increasing the XO point is a far better solution if max SPL becomes an issue I think.
__________________
dipoles dipoles dipoles dipoles dipoles dipoles dipoles dipoles and dipoles
  Reply With Quote
Old 15th September 2013, 09:39 PM   #4
jcx is online now jcx  United States
diyAudio Member
 
Join Date: Feb 2003
Location: ..
the real dimension you want to consider is the low frequency requirement - displacement increases at least as the inverse square of frequency, higher order for dipole

so just cross over a octave higher to the subs and the BG will be plenty loud
  Reply With Quote
Old 16th September 2013, 01:42 PM   #5
pk is offline pk  Denmark
diyAudio Member
 
Join Date: Apr 2003
Location: Aarhus, Denmark
Dear WrineX, StigErik, and jcx,

Thanks a lot for your replies!

At the moment I sit fairly close to the speakers (3-4 meters), but I may be moving in the not too distant future, and I really would like to preserve the posibility to play really loud at times (I used to have a fully horn loaded 3-way system with straight 29 Hz bass horns...).

So, I quess the RD75's are not for me.....

Thanks a lot for responding, though

Best regards
Peter





Quote:
Originally Posted by StigErik View Post
How loud do you want to play, and at what distance?

Using several drivers is not very effective, and will screw up the dispersion horizontally. Increasing the XO point is a far better solution if max SPL becomes an issue I think.

Last edited by pk; 16th September 2013 at 01:43 PM. Reason: typo
  Reply With Quote
Old 25th December 2013, 11:26 PM   #6
bikmakr is offline bikmakr  United States
diyAudio Member
 
Join Date: Dec 2013
Default Multiple RD75 drivers

I am currently playing with the same idea (See pic) for the same reason (more SPL's) After a lot of testing, 3 RD75's at 1 degree delta creates a wonderful sound stage without lobing. Any more and impedance gets interesting. I am struggling with mid-base matching with 2 Velodyne Sig 1812. My theory was having many RD75's, I could lower my XO to 125ish without stressing the ribbons. I have 6" wide airfoil baffles that I am going to tune to hopefully get more mid-base from reducing back-wave cancellation. Any comments are welcome, as I am a novice at building speakers. I am after better performance than my Genesis 201's had and the airiness of my old Infinity BETAS.
Attached Images
File Type: jpg DSCN0381.jpg (978.5 KB, 109 views)
  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
BG RD75 in Australia fwt1712 Planars & Exotics 13 9th February 2014 08:45 PM
Horizontal use of B&G RD75 noviygera Planars & Exotics 2 24th April 2013 10:00 PM
rd75 and cxr22 v12nut Planars & Exotics 2 9th February 2013 04:16 PM
waveguided RD75 Ang Planars & Exotics 3 13th January 2013 04:23 PM
(x2) RD75 ribbons clean4x4 Swap Meet 0 12th January 2004 04:04 PM


New To Site? Need Help?

All times are GMT. The time now is 03:39 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