Really basic TL question - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 October 2007, 06:15 PM   #1
diyAudio Member
 
weinstro's Avatar
 
Join Date: May 2003
Default Really basic TL question

Hi all,

Suppose I have a sealed enclosure, with an appropriate driver mounted. I used one of the many box size calculators to arrive at the enclosure size, aiming for a Qtc of 0.7.

Now suppose that one dimension of the box happens to equal the quarter wave length of the driver's Fs. Volume is unchanged from above, but the box is a tall column.

What happens? How would the performance of the driver differ from that predicted by say, Unibox? Does it matter where the driver is mounted?
  Reply With Quote
Old 10th October 2007, 07:33 PM   #2
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
Yes, it will make a difference where the driver is mounted. In effect, assuming it's stuffed properly, what you have there is a 'real' transmission line, rather than the more usual aperiodic lines, or mass-loaded lines. Will the differences be significant? Depends on the driver & cabinet. What exactly are they?
__________________
Community site www.frugal-horn.com Commercial site www.wodendesign.com
  Reply With Quote
Old 11th October 2007, 04:08 AM   #3
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Greets!

Assuming the box is still sealed, then there will be 'room' modes beginning at 1/2 WL with a deep notch at every harmonic, so its response will be tuned lower and anything but smooth. Driver placement makes a big difference with the midpoint yielding the smoothest, though still relatively ragged response which stuffing will smooth out to a great extent at the expense of a much higher F3.

Bottom line, not a good plan IMO.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 11th October 2007, 05:16 AM   #4
Shae is offline Shae  Australia
diyAudio Member
 
Join Date: Oct 2007
woops wrong thread
  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
amp question basic rec rebith75 Solid State 3 16th March 2007 05:43 PM
Basic RC Value Question SRMcGee Tubes / Valves 6 13th August 2006 05:39 PM
really basic question cuallito Tubes / Valves 6 15th April 2004 08:25 PM
Basic question Tommy Solid State 6 22nd February 2004 03:08 PM
really basic question MbayAQ Digital Source 3 7th January 2003 12:57 PM


New To Site? Need Help?

All times are GMT. The time now is 05:58 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