Desktop Dipole Monitors - 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 10th December 2012, 07:54 PM   #1
diyAudio Member
 
Melo theory's Avatar
 
Join Date: Sep 2009
Location: Gulfport fl.
Default Desktop Dipole Monitors

Ok, i'm starting this project tomorrow.

Click the image to open in full size.

I'm going to try out the whole baffle-less monitor craze.

So, they may look like they are in boxes but there are actually 1/2" slits all around them.
The reason for this is that i'm going to try for complete directivity by absorbing just enough of the rear wave to not beam,
That is just enough to have the dipole cancellation null at the sides without the additive amplitude of what frequencies will be in phase at the sides.
It will take a lot of experimenting with different thickness of foam, but I think it just might work.
For the bass driver, i'm not trying to absorb anything, the enclosure with the slits is just for rigidity.

These are the drivers i'm using.....
Dayton RS225S-8 8" Reference Shielded Woofer 8 295-366

Dayton Audio RS100-4 4" Reference Full-Range Driver 4 Ohm 295-378

The crossover will be at 750Hz, 1/2 wavelength distance between drivers, that's also the point where the bass driver is in 1/2 wavelength dipole mode.
I'll be using active DSP of course.

I'm sure these will have satisfying bass extension for the nearfield.
__________________
I LIKE YOU

Last edited by Melo theory; 11th December 2012 at 01:09 AM.
  Reply With Quote
Old 10th December 2012, 08:07 PM   #2
diyAudio Member
 
KyleinCowichan's Avatar
 
Join Date: Dec 2010
Location: Cowichan Bay, BC
Hello,

So the drivers are in cylinders with the 1/2" slits. Are the backs open? At first I thought the right-most object in the drawing was a computer tower.

At the very least they are going to be cool looking!

KM
  Reply With Quote
Old 10th December 2012, 08:37 PM   #3
diyAudio Member
 
Melo theory's Avatar
 
Join Date: Sep 2009
Location: Gulfport fl.
Haha! Yeah does resemble the tower
I guess I should have made them a different color.
No, the backs will be closed.
Thanx!
__________________
I LIKE YOU
  Reply With Quote
Old 10th December 2012, 10:20 PM   #4
dewardh is offline dewardh  United States
diyAudio Member
 
Join Date: Dec 2005
Location: Berkeley, CA
I had (still have, somewhere) a pair of Monsoon planar dipole computer speakers. Very "clean" sounding (was always tempted to try them in a "real" speaker, but haven't so far), but serious interaction with the desktop really compromised performance. You'll need to watch out for that . . .
  Reply With Quote
Old 10th December 2012, 10:30 PM   #5
tomtom is offline tomtom  Slovakia
diyAudio Member
 
Join Date: Dec 2006
I was thinking about exact same thing some time ago. I want use table desk as baffle for bass speakers /just holes a speakers mounted from bottom/. Plan was attach them to the wall with some adapters and just seal the hole with something soft to reduce vibration to desk. Sort of Linkwitz Orion mounting.
Off course in this case XO must be lower /cca 300/
  Reply With Quote
Old 10th December 2012, 11:04 PM   #6
diyAudio Member
 
Melo theory's Avatar
 
Join Date: Sep 2009
Location: Gulfport fl.
Quote:
Originally Posted by dewardh View Post
I had (still have, somewhere) a pair of Monsoon planar dipole computer speakers. Very "clean" sounding (was always tempted to try them in a "real" speaker, but haven't so far), but serious interaction with the desktop really compromised performance. You'll need to watch out for that . . .
How the heck do those little planars get down low enough to cross over to a sub?
with a 103db output they say? hmmmm.

Well, i'm sure these will interact less with the desk and such than typical box speakers.
Anyway, they don't have to be used on the desk.
They could be used as monitors with stereo subs
__________________
I LIKE YOU
  Reply With Quote
Old 10th December 2012, 11:06 PM   #7
diyAudio Member
 
Melo theory's Avatar
 
Join Date: Sep 2009
Location: Gulfport fl.
Quote:
Originally Posted by tomtom View Post
I was thinking about exact same thing some time ago. I want use table desk as baffle for bass speakers /just holes a speakers mounted from bottom/. Plan was attach them to the wall with some adapters and just seal the hole with something soft to reduce vibration to desk. Sort of Linkwitz Orion mounting.
Off course in this case XO must be lower /cca 300/
You would have to make sure you are leaning over the desk or you will be in the dipole null. Oh, and watch your elbows!
__________________
I LIKE YOU
  Reply With Quote
Old 11th December 2012, 02:09 AM   #8
diyAudio Member
 
Join Date: Jun 2004
Location: Orlando, FLA
Just watch out for the nasties at 16KHz on the RS100. I will interested if you can still detect any metallic edge or harshness once EQ'd flat on axis.

I still have the original Monsoon planar desktop system. I love it. Very smooth sounding.

Greg
  Reply With Quote
Old 11th December 2012, 02:30 AM   #9
diyAudio Member
 
Melo theory's Avatar
 
Join Date: Sep 2009
Location: Gulfport fl.
Hey, studio. the ambiopole isn't ready yet. if you read the Supernova thread, you will see I'm having problems so, I'll let you know when it's time to come listen

I already have these drivers, they sound really good.

Click the image to open in full size.

Click the image to open in full size.

I also have the 8 inchers from a project I never started.
__________________
I LIKE YOU
  Reply With Quote
Old 11th December 2012, 02:32 AM   #10
dewardh is offline dewardh  United States
diyAudio Member
 
Join Date: Dec 2005
Location: Berkeley, CA
Quote:
Originally Posted by Melo theory View Post
Anyway, they don't have to be used on the desk.
That's kinda parta the problema . . . they depend on the desktop for mid-bass reinforcement. Lift them up in "free air" like a monitor and they get kind of thin . . . bit of a hole between the panels and the "sub" woofer. Add a ND-105 or something like it, though, and . . .

Next lifetime . . .
  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
How much free air does a dipole line need to stay a dipole? seaspeak Planars & Exotics 0 13th September 2011 05:20 PM
Dipole Ribbon tweeter isolation from dipole mid-woofer array Bent Planars & Exotics 5 21st May 2009 01:10 PM
(WW) MMTMM dipole 4 vs 3 way / dipole benefit frequencies? charliemouse Multi-Way 25 8th July 2007 12:19 AM


New To Site? Need Help?

All times are GMT. The time now is 12:42 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