Q on T-TQWP - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 28th December 2013, 05:44 AM   #1
diyAudio Member
weinstro's Avatar
Join Date: May 2003
Default Q on T-TQWP


1. What is the difference between a T-TQWP system and a T-TQWT system?

2. Are the desired driver parameters similar to those for a TH system, e.g., low Qes, low Vas, and high Qms?

Thanks and regards,

  Reply With Quote
Old 28th December 2013, 06:02 AM   #2
diyAudio Member
picowallspeaker's Avatar
Join Date: Apr 2007
Pipe or tube, it's a line. The T stands for Tapered, in the horn means Tapped.
And the behavior at low frequencies is different, since a TL is a way to couple the movement of the cone by tuning the acoustic load ( seen by the back of the cone of the driver ) to 1/4 of the wavelenght.
Horn loading a cone is different: it's not direct radiation as the resistive impedance seen by the cone changes with the horn, and the bass behavior is not defined by Fc and Q; the horn+driver is different, as Qms is different ( air ...weights ).
  Reply With Quote
Old 28th December 2013, 03:43 PM   #3
GM is offline GM  United States
diyAudio Member
GM's Avatar
Join Date: Jun 2003
Location: Chamblee, Ga.
For a back loaded or tapped alignment, a low Qms is desirable since there's little acoustic loading to balance out the pipe's/horn's. WRT low Qes, this is a function of the desired BW, so doesn't de facto need to be as low as some claim.

Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  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
TH or T-TQWP or ???? NWCgrad Subwoofers 92 27th August 2012 04:45 PM
solo tqwp nebojsa Full Range 7 26th June 2007 03:45 PM
TQWP with FE166ESR Tachyon Full Range 13 9th February 2005 09:25 PM
How to fold a TQWP? JC Fardo Multi-Way 5 9th February 2004 05:13 PM
Picture of my new ML TQWP Jim Read Multi-Way 0 8th March 2003 04:16 PM

New To Site? Need Help?

All times are GMT. The time now is 07:53 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