OB Project Design Started, Help Requested. - Page 31 - 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 January 2011, 04:29 AM   #301
diyAudio Member
 
gainphile's Avatar
 
Join Date: Dec 2007
Location: Melbourne the sunny city!
Hi David,

I just wrote a small article on measurements of dipole loudspeakers. Hopefully we can compare notes. Note that I never measure at listening distance.

Gainphile: Measuring Open Baffle loudspeakers
__________________
http://gainphile.blogspot.com
  Reply With Quote
Old 10th January 2011, 03:56 PM   #302
Helmuth is offline Helmuth  Netherlands
diyAudio Member
 
Helmuth's Avatar
 
Join Date: Oct 2008
Location: Winterswijk
Quote:
Originally Posted by gainphile View Post
Hi David,
Hopefully we can compare notes. Note that I never measure at listening distance.
Note you hear what you receive(stereo) at your listening point. That is leading IMO.

Like I did here.

A backloaded horn low and horn midhigh.Project presentation Horn Almighty
__________________
( (( KUGELWELLE )) )
recent projects :OB-mk1 /fatboy / monitor-xl / Horn-AM / dappolito / td124-mk1-rb301 / Hybrid-pse / Vfet

Last edited by Helmuth; 10th January 2011 at 04:02 PM.
  Reply With Quote
Old 10th January 2011, 04:35 PM   #303
SimontY is offline SimontY  United Kingdom
diyAudio Member
 
SimontY's Avatar
 
Join Date: May 2003
Location: Sheffield, North England
Send a message via MSN to SimontY
I also struggle with the concept of measuring only in free space away from boundaries etc. Isn't it best to do both, when possible?
  Reply With Quote
Old 10th January 2011, 09:58 PM   #304
diyAudio Member
 
gainphile's Avatar
 
Join Date: Dec 2007
Location: Melbourne the sunny city!
One can't correct deviations in time domain with amplitude adjustments.

Otherwise DSPs would have solved all of our 'problems' by now.
__________________
http://gainphile.blogspot.com
  Reply With Quote
Old 10th January 2011, 10:39 PM   #305
diyAudio Member
 
John Busch's Avatar
 
Join Date: Oct 2007
Location: Hill country, Texas
Just finished reading Gainphile's "Measuring Open Baffle Loudspeakers" Interesting. Can't wait to read Gainphile's "Advanced" topics, especially "why passive dipoles won't work". Need to know how my well received passive OB designs manage to please so many? Hmmmm.....? Northern CA DIY, LSAF, RMAF......
  Reply With Quote
Old 10th January 2011, 11:00 PM   #306
SimontY is offline SimontY  United Kingdom
diyAudio Member
 
SimontY's Avatar
 
Join Date: May 2003
Location: Sheffield, North England
Send a message via MSN to SimontY
Quote:
Originally Posted by gainphile View Post
One can't correct deviations in time domain with amplitude adjustments.

Otherwise DSPs would have solved all of our 'problems' by now.
I'm not 100% sure that allowing for a listening space in the design parameters is the same as performing EQ (DSP). I use no EQ and have a good response, but I did measure my system in my room as a means to easily achieving the desired sound. I am something of a novice with speaker design however, always looking to learn more
  Reply With Quote
Old 10th January 2011, 11:05 PM   #307
SimontY is offline SimontY  United Kingdom
diyAudio Member
 
SimontY's Avatar
 
Join Date: May 2003
Location: Sheffield, North England
Send a message via MSN to SimontY
Quote:
Originally Posted by John Bsuch View Post
Can't wait to read Gainphile's "Advanced" topics, especially "why passive dipoles won't work".
I'd definitely like to read that too. It's very much news to me as my ears and measurements told me (my) passive open baffles can work, and if this is the sound of "not working" then sign me up for more!! Sure, there are trade-offs but "won't work" seems a bit strongly-worded. It also implies the author hasn't tried - yet??
  Reply With Quote
Old 11th January 2011, 12:17 AM   #308
diyAudio Member
 
gainphile's Avatar
 
Join Date: Dec 2007
Location: Melbourne the sunny city!
It is not my intention to offend anyone. I have reworded it to "Difficulties with passive dipole loudspeakers."
__________________
http://gainphile.blogspot.com
  Reply With Quote
Old 11th January 2011, 07:18 AM   #309
DQ828 is offline DQ828  Australia
diyAudio Member
 
DQ828's Avatar
 
Join Date: Mar 2010
Location: Lake Macquarie, East Coast Australia
I'm all for measuring outside for crossover purposes & to see how the crossover is working, but for me the final adjustments are made in the room.

I had the tweeter EQ'd within an inch of its life, showing a fairly impressive looking line, in the end I turned the tweeter specific EQ off & left the global high shelving on and liked the result better, even though the measurement didn't look so good.

My passive P17 clones sound pretty bloody good to me and may others, no audio nuts though. (they didn't measure well). I think the approach of keeping it simple, like the P17 crossover, can have benefits

David
  Reply With Quote
Old 11th January 2011, 07:33 AM   #310
DQ828 is offline DQ828  Australia
diyAudio Member
 
DQ828's Avatar
 
Join Date: Mar 2010
Location: Lake Macquarie, East Coast Australia
Since I reported "I think I'm happy for the moment" I was listening to some classical guitar & thought the highs where a bit lacking, so guess what, I had a fiddle, imagine that.

I changed the high shelf configuration a little & "I think I'm happy for the moment"

Or maybe not, we will see, they are sounding great though.

I was convinced to go active by the boys on the forum, "it'll be much easier they said" & they where right in one respect, it SO much easier to change the crossover & EQ 10mins & your done, with no dirty hands, I'm glad I did.

Its also lead to another project, six channel amp.

David

I should have said 2 extra projects, the active crossover of course.

Last edited by DQ828; 11th January 2011 at 07:36 AM.
  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
S11 OB - Revisiting Desktop OB design using Seas 8" and Tang Band Full-Range gainphile Multi-Way 27 23rd January 2013 10:51 PM
New open source loudspeaker design program project started Karoliina Multi-Way 33 10th December 2009 11:18 AM
I've started my first project... Bigun Full Range 38 8th February 2009 02:15 AM
A roast requested on my TQWT design Christof Multi-Way 9 29th March 2004 06:57 PM


New To Site? Need Help?

All times are GMT. The time now is 01:15 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