Qtc for the Flexunits 12 B 77 25 10 - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 12th December 2007, 04:34 PM   #1
Tomv is offline Tomv  Israel
diyAudio Member
Join Date: May 2005
Location: Israel
Default Qtc for the Flexunits 12 B 77 25 10

I was wondering what Qtc should I aim for, as I understand i right now the most popular approach is 0.707, but the Audio Technology salesman
said most of their customers prefer 0.5 and he prefers 0.577.
What's your opinion?
  Reply With Quote
Old 12th December 2007, 07:49 PM   #2
diyAudio Member
Saturnus's Avatar
Join Date: Jun 2005
Location: Copenhagen, Denmark
It depends on the listening room size, dampening, and speaker placement, as well as personal preference, but much more on the former than most people realize.

The "perfect" Qroom is 1. That is per definition only achieved perfectly with a Qbox=1 in free-field conditions which is defined by a point in space where the distance to any surface is longer than the wave length of the lowest frequency the speaker can produce.

Any surface will have a negative or positive effect on Qroom, depending on whether it dampening (decreasing Q) or reflecting (increasing Q).

I hope that this little piece of theory makes you realize that Qbox is totally dependant on your listening room, and therefore it is nonesense to argue for a "perfect" Qbox. It is certainly true that most listening rooms fits a Qbox between 0.5 (critically dampened) and 0.707 (Butterworth alignment).

In general, the smaller the room and the more dampened the room is, the smaller the Qbox should be. And the larger the room and less dampened the room is, the larger the Qbox should be.
  Reply With Quote
Old 12th December 2007, 09:02 PM   #3
diyAudio Member
Join Date: May 2006
Check this http://www.sonicdesign.se/optimum.html
  Reply With Quote


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
for sale: ATC SM75-150S, ScanSpeak R2904/7000-09, AudioTechnology 6B771020 FlexUnits vincentrubble Swap Meet 18 8th September 2008 02:47 PM
Anyone used Flexunits for a small sub? smithy666 Subwoofers 0 25th December 2006 09:24 PM

New To Site? Need Help?

All times are GMT. The time now is 06:35 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2