Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

transmission line design
transmission line design
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 24th June 2019, 03:22 AM   #1
contractsman is offline contractsman  United States
diyAudio Member
Join Date: Mar 2011
Default transmission line design

I'd like to install a full range driver into a Sony SS-TL1 Transmission line speaker cabinet (pictured below).

It was a Goodwill find I couldn't resist for $30 (Audio Karma sensibility). I re-foamed the original cheap drivers and the sound is OK but unremarkable... *except for the bass performance which is amazingly extended and deep... especially considering the cheap stamped basket mid-woofer *

OK. I read enough here about TL designs to realize I don't know WTF I'm doing.
  Reply With Quote
Old 24th June 2019, 03:43 AM   #2
rayma is offline rayma  United States
diyAudio Member
Join Date: Apr 2011
Originally Posted by contractsman View Post
I'd like to install a full range driver into a Sony SS-TL1 Transmission line speaker cabinet
If you do like the bass, just replace the crossover electrolytics and be done with it.

Last edited by rayma; 24th June 2019 at 03:51 AM.
  Reply With Quote
Old 24th June 2019, 04:09 AM   #3
contractsman is offline contractsman  United States
diyAudio Member
Join Date: Mar 2011
Thanks for the input Rayma... I inadvertently posted before completing the post with a lot more information relevant to driver recommendation. I just asked the moderators to delete this thread.
Thank you again!
  Reply With Quote
Old 6th December 2019, 06:13 AM   #4
sujat is offline sujat  India
diyAudio Member
Join Date: Nov 2019
Location: Bhaarat (India)
Dear Stalwarts & Enthusiasts,

I couldn't find anything on the internet yet (or probably i missed recognising it on Martin King's wonderful site) to resolve a few conceptual questions on QW pipe design.

* When a driver is mounted in a QW pipe (or an open-ended terminated line of any geometry), the system resonance goes lower than the driver Fs (unlike in any other enclosure). On basis of this:

1. Is it safe to assume that the effective Mms that the driver's motor "sees" is greater than that as measured in free air and mentioned in the driver datasheet?

2. If yes, would the higher Mms also lower the high frequency extension as well as the sensitivity of a wide-band driver?

3. Does it have any indication that the column of air through the line/pipe acts as a constant load against the driver cone effectively helping control its excursion? Is this air column load effective only around the 1/4 wavelength tuning frequency, or consistent throughout the whole frequency band?

4. On basis of 3. above, for a given 8" driver, let us assume two boxes - a 54 litre simple closed box and a Tapered QW pipe with the same internal volume, i.e. 54 litres (with 1/4 wavelength tuning at approx. 45 hz.) - * Would the driver gain any advantage in the QW pipe (over the simple closed box) as far as its excursion-limited power handling in the lowermost operating frequency band is concerned (i.e. 100 hz and below)?

These questions have remained unresolved in my mind for a long time. I would be greatly thankful if anybody can shed some light on this.

Thanks in advance! ��
  Reply With Quote


transmission line designHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Transmission line Omni speakers? Duevel Planets clone with transmission line? DeeLuxx Multi-Way 57 12th February 2019 01:32 AM
Transmission line design Cayd Multi-Way 30 27th February 2015 11:42 PM
Transmission Line speakers Design ttan98 Multi-Way 0 25th May 2011 12:04 AM
Transmission line box, is this a ok design? spanerman Subwoofers 13 11th August 2009 11:48 PM
Transmission line design?? Dominick22 Subwoofers 1 15th September 2006 08:24 PM

New To Site? Need Help?

All times are GMT. The time now is 09:04 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio