Transmission Line for or against? - 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 9th June 2006, 04:59 PM   #1
diyAudio Member
 
Join Date: Jun 2006
Default Transmission Line for or against?

Hi I'm very new to the world of diy hi-fi, but after seaching it seems most things seem possible!, i'd just like to know your views as i'm thinking of building a pair of TL speakers, I like a fairly flat response, but have'nt as yet heard TL!

Thanks
__________________
Sorry i only build PA systems!
  Reply With Quote
Old 9th June 2006, 10:24 PM   #2
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
You can get a flat response from just about anything if you try hard enough. Go for it though. If you want a versatile box speaker, there's nothing to touch them.

Go to www.quarter-wave.com for Martin King's many superlative articles and seminal MathCad sheets. All you'll ever need to design your own TL.

Best
Scott
__________________
Community site www.frugal-horn.com Commercial site www.wodendesign.com
  Reply With Quote
Old 9th June 2006, 10:30 PM   #3
diyAudio Member
 
BobEllis's Avatar
 
Join Date: Sep 2003
Location: Upstate NY
From what I've modeled in Martin King's worksheets, a MLTL gives the smoothest upper end response. However, the ripples in a regular line's response (measured as predicted in the lines I built) don't seem to be audible. Just don't get fooled into thinking a MLTL is just a ported box.
  Reply With Quote
Old 9th June 2006, 11:30 PM   #4
rjb is offline rjb  New Zealand
diyAudio Member
 
Join Date: Jun 2004
Location: Piha
I presume you have read up on the different types of enclosures, so know the basic differences and how they work.

The basic sound of an complete speaker is controlled by the drivers, and how the designer has used them so its difficult to compare just enclosures without fixing all other parameters.

However as a general statement, well designed TL's tend to appear to have less bass than say a Bass reflex, (may seem bass light), but this is because it is cleaner with less overhang. In fact the bass rolloff is slower so they usually go deeper. The mid range also seems cleaner. The downside is they are bigger, and more complex to construct.

Don't forget that room gain tends to increase the apparent bass, which can be good or bad, depending.

I like them
  Reply With Quote
Old 10th June 2006, 07:41 AM   #5
diyAudio Member
 
Join Date: Jun 2006
Thanks guys, had a look at the website scottmoose looks possible!, although i don't see at present how one full range driver in an enclosure can be as "clean" as two or three (or is that part of the design that i'm not getting, bearing in mind i'm only used to large bass reflex designs PA wise!)
__________________
Sorry i only build PA systems!
  Reply With Quote
Old 10th June 2006, 08:35 AM   #6
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
It depends on your definition of 'clean'. Like any subjective evaluation, it means different things to different people. Some use it in reference to a lack of crossover distortion, coupled with crisp definition of transients etc. Others suggest it is a 'smooth' sound, without audible cone colouration, others... you get the idea.

An FR dynamic driver will never be as flat, objectively, as a multiway, which is hardly surprising, given everything you're trying to do with a single cone. It really depends on what subjective qualites you most value, or annoy you the most. For me, it's crossover problems. I've no problem with crossovers to be honest; the trouble with them is, there aren't many good ones. So I'm willing to accept a few other compromises, which don't annoy me especially, in order to circumvent the one that gets my goat, and reap a few other benefits too.

Martin is the man who's done the most work on TLs. It'd be a very brave man (or a fool) that ignors it. That isn't just ye olde rule of thumb that's one his site, as you can see. TLs don't necessarily have to be more complicated to build than a regular BR box -the MLTL for example looks almost exactly the same for example, though they don't operate in the same way. So don't let that put you off. If you fancy the traditional tapered sort, first stop is to read Martin's new Anatomy of a TL article (yes, there's a lot of maths, but he's done it all for you, and it's easy to follow), then his Classic TL Alignment Tables, which will give you a good starting point. Try to go for a smooth, graduyal roll off below 100Hz to keep in step with room-gain, or you'll find things start to get too bass-heavy, as rjb notes. For reference, near corners, you'll get about 6db of lift, near a rear wall, about 3db. Depends ont he room, obviously, but those are the approximates.

Hope this is of use
Scott
__________________
Community site www.frugal-horn.com Commercial site www.wodendesign.com
  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
how to combine Line array and transmission line together Jared Multi-Way 7 15th December 2012 01:20 PM
about transmission line bigcatdairy Multi-Way 14 25th November 2011 07:46 AM
line array + transmission line ? zobsky Multi-Way 12 16th August 2006 04:18 PM
Transmission Line ADD ONS caratje Subwoofers 10 4th January 2006 09:49 AM
Hi-Vi B2S Transmission Line BAM Multi-Way 1 14th August 2002 08:59 AM


New To Site? Need Help?

All times are GMT. The time now is 06:52 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