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 6th December 2012, 10:23 PM   #771
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
100-200Hz in most stand mounts, detracts from music fundamentals. Hence Roy Allison's countermeasures in design concepts. You need double mattresses thick stuff on floor or kid sized anechoic wedges to stop such stuff unfortunately.
  Reply With Quote
Old 6th December 2012, 10:34 PM   #772
Starre is offline Starre  Sweden
diyAudio Member
 
Join Date: Aug 2011
Location: Stockholm
Ouch :, not easy to implement then. I had a look at your posted measuring of the speakers and it also show that peak at 50-60 Hz. This should be a standing wave between floor and roof I think, since f = 343/2x2,5 gives f=68 Hz with a height of 2.5 m in room. To be correct the speaker would be directly at floor level, and with speakers it is never so in real life since it is away from the floor, maybe this is why the peak is a bit lower than 68Hz?
  Reply With Quote
Old 6th December 2012, 11:02 PM   #773
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
That is why subs are on the floor where ever possible in gigs when point source satellites or line arrays hang like bananas. Also in column speakers that are 3 way, the bass units make half space to floor and mids cross away from their first reflection wavelength to lows as per Allison for those following.
  Reply With Quote
Old 6th December 2012, 11:19 PM   #774
Starre is offline Starre  Sweden
diyAudio Member
 
Join Date: Aug 2011
Location: Stockholm
Ok, It also came to mind that if you try different stands height it can lower a standing wave peak a little since its amplitude is at maximum in the middle between floor and ceiling (lowest mode), but if you put it as close as possible to the floor it gives other problems. Maybe a low speaker tilted upwards is good to get the woofer closer to floor level?
  Reply With Quote
Old 6th December 2012, 11:44 PM   #775
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Subs and sats and 3 or 4 ways help have basses low and mids at seated ear height. Stand mounts are usually very nice but suffer floor cancellations.
  Reply With Quote
Old 6th December 2012, 11:48 PM   #776
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Quote:
Originally Posted by Starre View Post
Maybe a low speaker tilted upwards is good to get the woofer closer to floor level?
Click the image to open in full size.

  Reply With Quote
Old 7th December 2012, 12:22 AM   #777
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
This was even more extreme :Snell Type 1 Crossover Rebuild

I heard it ones in a big room in the late 70th. To my surprise it worked but i was quite far away. Maybe 3 meters or more.
  Reply With Quote
Old 7th December 2012, 12:25 AM   #778
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
To wedge and to reflect.
  Reply With Quote
Old 7th December 2012, 01:06 AM   #779
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
Peter Snell had a lot of innovative ideas. sorry that he passed away so early.
  Reply With Quote
Old 7th December 2012, 01:07 AM   #780
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
Was not a big success on the market though but maybe i will try something like that sometimes. I think it needs a rather big room tough.
  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
Building a simple "soft start" speaker protection circuit richard.C. Power Supplies 21 6th August 2011 08:12 AM
"Commercial" install in NP Building Material Store Destroyer OS. Everything Else 2 19th July 2010 04:15 AM
"TECHNO"Amp building in progress-using "Iron Method" zox2003 Solid State 23 30th March 2010 08:42 PM
Building a 2.1 system out of a 48"x96" sheet of 3/4" MDF 454Casull Multi-Way 0 18th November 2008 02:19 AM
10" basS/mid for "party-speaker" TroelsM Multi-Way 0 16th September 2005 11:14 PM


New To Site? Need Help?

All times are GMT. The time now is 04:46 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