The Advantages of Floor Coupled Up-Firing Speakers - Page 164 - 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 2nd July 2012, 09:47 AM   #1631
diyAudio Member
 
Join Date: Oct 2006
Location: Cambridge, UK
I agree... and this may be the root of the problem. I am hoping that a reduction to 2 (or possibly) one unit will suffice to provide the missing ambience. we shall see.
George
  Reply With Quote
Old 2nd July 2012, 10:12 AM   #1632
diyAudio Member
 
Join Date: Oct 2006
Location: Cambridge, UK
Hi,

thanks for reminding me about Jordan. I do have his book buried somewhere, but it is nice to know that he is still in business.
I seem to recall that at the end of his book he discusses a "shelf" of loudspeakers running around or across a room, with many units (his presumably) fed from the left and right channels but with a delay line to stagger the sound. Now that would give a broad sound stage, if the original recording had captured it. I don't know if this ever went into production and I have not heard of it outside of his book

George
  Reply With Quote
Old 2nd July 2012, 08:34 PM   #1633
Colin is offline Colin  United Kingdom
diyAudio Member
 
Join Date: Aug 2003
It's mentioned in the article but I don't know if he ever produced it.
  Reply With Quote
Old 27th August 2012, 06:56 AM   #1634
graaf is offline graaf  Poland
diyAudio Member
 
graaf's Avatar
 
Join Date: Jun 2007
from "Acoustics and Psychoacoustics" by Howard and Angus, 4th ed., Focal Press 2009, Chapter 6: "Hearing Music in Different Environments":
Attached Images
File Type: jpg Howard and Angus, p. 296.jpg (174.4 KB, 222 views)
  Reply With Quote
Old 27th August 2012, 10:49 AM   #1635
6.283 is offline 6.283  Germany
diyAudio Member
 
Join Date: Aug 2008
Location: Black Forest
Hi Graaf,

the ratio of reflected / direct sound and the quality of the reflected sound are very important aspects.
You might be interested in what I have assembled (in writing) about these aspects and some additional ones.
It is a bit lengthy, so again my recommnedation to enjoy it with your favorite beverage/beveridge

What is the optimum polar response of a speaker
__________________
2Pi-online.de
  Reply With Quote
Old 27th August 2012, 11:55 AM   #1636
graaf is offline graaf  Poland
diyAudio Member
 
graaf's Avatar
 
Join Date: Jun 2007
thanks!

I believe this one belongs in this thread:
Quote:
Originally Posted by speakerdoctor View Post
One of Peter Snell's earliest design, the 'type 1' had the tweeter at the very bottome of the cabinet that included a bottom 'flap' to reflect the tweeter's output. However, that was the end of that approach. Peter later went on to create the Model "A" and the rest is history.
Snell Type 1's

Stig Carlsson referred to this design in His patent application

Last edited by graaf; 27th August 2012 at 11:59 AM.
  Reply With Quote
Old 27th August 2012, 12:00 PM   #1637
graaf is offline graaf  Poland
diyAudio Member
 
graaf's Avatar
 
Join Date: Jun 2007
some photos
Attached Images
File Type: jpg _snellones.jpg (142.6 KB, 205 views)
  Reply With Quote
Old 27th August 2012, 01:47 PM   #1638
diyAudio Member
 
speaker dave's Avatar
 
Join Date: Nov 2009
Location: The Mountain, Framingham
The model A preceeded the type 1. At Snell we referred to the type 1 (affectionately) as "the wheelchair ramp". (It had a shallow ramp leading up to the mid point of the tweeter.)

Not a big seller.

Note that in my testing the critical distance in a typical listening room is about equal to the listening distance. That is, you here direct field and reverberent field in roughly equal proportions. No matter what, your ear/brain is pretty good at hearing through to the direct/early sound.

Be careful when giving credance to RTA curves over direct field measurements.

David
  Reply With Quote
Old 27th August 2012, 05:43 PM   #1639
graaf is offline graaf  Poland
diyAudio Member
 
graaf's Avatar
 
Join Date: Jun 2007
Quote:
Originally Posted by speaker dave View Post
Note that in my testing the critical distance in a typical listening room is about equal to the listening distance. That is, you here direct field and reverberent field in roughly equal proportions. No matter what, your ear/brain is pretty good at hearing through to the direct/early sound.
so 2-3 meters? in a typical listening room? are You sure? which frequency band? what is the directivity of loudspeakers used for those test?

Last edited by graaf; 27th August 2012 at 05:57 PM.
  Reply With Quote
Old 27th August 2012, 06:04 PM   #1640
graaf is offline graaf  Poland
diyAudio Member
 
graaf's Avatar
 
Join Date: Jun 2007
ps.

again from Howard and Angus:
Attached Images
File Type: jpg Howard and Angus.jpg (115.6 KB, 157 views)
File Type: jpg Howard and Angus (2).jpg (44.6 KB, 146 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
Using a diffuser cone for up-firing speakers tspringer99 Multi-Way 19 23rd July 2014 02:04 AM
Floor Standing Speakers. gurpreetsingh Full Range 11 12th June 2012 06:42 AM
side/ rear firing speakers Good/Bad? mcmahon48 Multi-Way 1 6th February 2009 12:28 PM
How far can the driver of a down-firing sub be from the floor? The Paulinator Subwoofers 11 16th May 2007 08:10 PM
Woofer: side firing pair vs front firing? tcpip Multi-Way 13 9th September 2005 02:13 PM


New To Site? Need Help?

All times are GMT. The time now is 11:47 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