Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

Ultimate Open Baffle Gallery
Ultimate Open Baffle Gallery
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 25th September 2018, 02:30 AM   #2541
perceval is offline perceval  Taiwan
diyAudio Member
 
perceval's Avatar
 
Join Date: Feb 2014
Location: Taiwan
Quote:
Originally Posted by umut1001 View Post
Hi.Thank you for your suggestions.I am sure these speakers are great sounding.Sorry i showed them to both wife and daughter and sorry they did not like them.
Width should not exceed 25cm.Depth no problem.Height should not exceed 120cm.(these are the criterias)
It is better the drivers is not seemed and speaker to be white coloured high gloss.
Then, do not do real open baffles.
Unless you are happy having small tiny sound and no bass.

Here's another option combining small and OB sound.

The Nola Brio Trio.
Two small enclosures, two drivers per side, one is vented, the other is OB.
They will need one or two subs that you can hide somewhere in the room, under a table, under the couch, etc...

There's a thread to DIY them here:
Need help building open baffle/bass reflex hybrid

Just paint them white instead of black.

Click the image to open in full size.

Ultimate Open Baffle Gallery-screen-shot-2018-09-25-10-26-27-am-png
Attached Images
File Type: png Screen Shot 2018-09-25 at 10.26.27 AM.png (700.7 KB, 942 views)
  Reply With Quote
Old 25th September 2018, 09:38 PM   #2542
umut1001 is offline umut1001  Europe
diyAudio Member
 
umut1001's Avatar
 
Join Date: Mar 2007
Location: Istanbul
What about cross positioning or side positioning of alpha 15 bass drivers to decrease width of speaker?
__________________
"Peace at Home, Peace in the World"
http://stores.ebay.com/Paradise-of-H...dio-components www.hiendparadise.net

Last edited by umut1001; 25th September 2018 at 09:40 PM.
  Reply With Quote
Old 26th September 2018, 02:34 AM   #2543
mkane77g is offline mkane77g  United States
Always Learning
diyAudio Member
 
Join Date: Nov 2014
Location: 100 miles N. of S.F.
Ultimate Open Baffle Gallery
anythings possible
  Reply With Quote
Old 26th September 2018, 03:13 AM   #2544
PjVervoorn is offline PjVervoorn  Thailand
diyAudio Member
 
Join Date: Dec 2017
Location: ภูเก็ต / หาดใหญ่
I have built a pair of N-Frames, 2 12" drivers per side.
They are symmetrical (left and right are mirrored), easy to build.
On top I have JBL 308 monitors (no time or skills to do a complete speaker.).
Only 25cm wide is quite small, but you could make them smaller.
The photo is from the rear side btw.
Attached Images
File Type: png top.PNG (20.5 KB, 773 views)
File Type: jpg IMG_20170818_160707.jpg (153.0 KB, 792 views)
  Reply With Quote
Old 26th September 2018, 06:15 AM   #2545
Juhazi is offline Juhazi  Finland
diyAudio Member
 
Juhazi's Avatar
 
Join Date: Mar 2007
Location: Jyväskylä, Finland
Baffle dimension is very important factor when designing and evaluating open baffle speakers. A semi-open box like NOLA uses is weird and the N frame in the previous post works right only below 1000Hz - and are very prone to resonances.

Soundwave length variation in music is the problem here, soundwave bending and summation must be undestood well. That is why best results come from 3-4 way speakers with variable baffle width/dimensions. A narrow open line needs a different solution for mid- bass below say 300Hz.

Good reading here
Electro-acoustic models
Tech
Dipolplus - Alles über offene Schallwände
Click the image to open in full size.
__________________
AINOgradient speaker project

Last edited by Juhazi; 26th September 2018 at 06:20 AM.
  Reply With Quote
Old 9th October 2018, 01:16 AM   #2546
MITsound is offline MITsound  Canada
diyAudio Member
 
MITsound's Avatar
 
Join Date: Jul 2013
Location: Burnaby
Ultimate Open Baffle Gallery
Default 322

Sort of winging the baffle size for this.
Tested the concept with a 16x48" baffle, with the midranges and tweeters just screwed to the side of the try baffle.
Still awaiting delivery on a second pair of Neo 10 Bohlender Graebeners.
Still awaiting delivery of 4 Celestions 1525e-4, 15 " woofers.
Made two of these tonight, but I'm too lazy to cut out the tweeter holes.
The plan is, a Neo 8 ( I think mine are PDRs) splitting treble with a Neo 3PDR, 1 slope passive at 6000 Hz, actively crossed 4 slope to two BG Neo 10s, at 2500hz, actively crossed to the woofers, also 4 slope, at 175hz.
The two tweeters will share an amp channel, as will the two midranges, and will be vertically biamped with some nice little class a amps, 15 watts into 4 ohm loads.
The mixing of a total of two 4 ohm bass drivers, and one 8 ohm bass driver per channel allow for a few wiring and amping options, but I will start with them as a 4 ohm load, and a stereo Behringer A500 I've had around for a while.
This started out as a smaller alternative to my home made Onkens, with 511B and B+C horns.
Now they'll be a couple inches wider, and taller, at 24.5" wide, and 60" tall.
I'm hoping these will match the Onkens for dynamics, be a little smoother, and have better bass, that's less intrusive on my apartment neighbours.
Attached Images
File Type: jpg IMG_20181008_174619.jpg (671.5 KB, 49 views)
__________________
"Aim above morality. Be not simply good; be good for something." HD Thoreau

Last edited by MITsound; 9th October 2018 at 01:22 AM.
  Reply With Quote
Old 9th October 2018, 01:49 AM   #2547
mkane77g is offline mkane77g  United States
Always Learning
diyAudio Member
 
Join Date: Nov 2014
Location: 100 miles N. of S.F.
Ultimate Open Baffle Gallery
Quote:
Originally Posted by Juhazi View Post
Baffle dimension is very important factor when designing and evaluating open baffle speakers. A semi-open box like NOLA uses is weird and the N frame in the previous post works right only below 1000Hz - and are very prone to resonances.

Soundwave length variation in music is the problem here, soundwave bending and summation must be undestood well. That is why best results come from 3-4 way speakers with variable baffle width/dimensions. A narrow open line needs a different solution for mid- bass below say 300Hz.

Good reading here
Electro-acoustic models
Tech
Dipolplus - Alles über offene Schallwände
Click the image to open in full size.
looks familiar
  Reply With Quote
Old 10th October 2018, 03:00 AM   #2548
MITsound is offline MITsound  Canada
diyAudio Member
 
MITsound's Avatar
 
Join Date: Jul 2013
Location: Burnaby
Ultimate Open Baffle Gallery
Quote:
Originally Posted by mkane77g View Post
looks familiar
Form follows function.

Has anyone tried a satin or semigloss latex paint on their projects?
I plan to paint my baffles à la Eddie Van Halen's guitar scheme, red field, black and white stripes.
I ask, because I'm hoping some car wax and a buffing pad will shine things up, without me needing to outsource the painting to a shop.
__________________
"Aim above morality. Be not simply good; be good for something." HD Thoreau
  Reply With Quote
Old 10th October 2018, 10:53 AM   #2549
6thplanet is offline 6thplanet  United States
diyAudio Member
 
6thplanet's Avatar
 
Join Date: Jun 2009
Location: New Albany, IN
Ultimate Open Baffle Gallery
I dunno about car wax and buffing pad on latex paint????
  Reply With Quote
Old 10th October 2018, 08:41 PM   #2550
MITsound is offline MITsound  Canada
diyAudio Member
 
MITsound's Avatar
 
Join Date: Jul 2013
Location: Burnaby
Ultimate Open Baffle Gallery
Quote:
Originally Posted by 6thplanet View Post
I dunno about car wax and buffing pad on latex paint????
Did a test, and it works fine. Not able to set up a spray booth in my apartment, and every polyurethane finish winds up with dust particles in it. This way, an inexpensive cut polish leaves a very good surface.
__________________
"Aim above morality. Be not simply good; be good for something." HD Thoreau
  Reply With Quote

Reply


Ultimate Open Baffle GalleryHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Open baffle or no baffle for nearfield full range monitors? mdevelde Full Range 19 18th November 2016 04:26 PM
Ultimate Open baffle for tannoy red 15 inch murphythecat8 Full Range 20 30th January 2013 12:29 AM
Upwards aligned open baffle? ( pop box meets open baffle ) OllBoll Full Range 3 28th March 2011 01:00 AM


New To Site? Need Help?

All times are GMT. The time now is 12:35 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki