Transmission Line Enclosures

solacedagony · Post by **solacedagony** » Mon Mar 06, 2006 6:46 pm

I was wondering if anyone has any links on Transmission Lines enclosures that explains how they work, why they work, their pros/cons, etc. I found a site or two with projects and whatnot but I don't understand how each works because each one uses a different design.
http://www.t-linespeakers.org/projects/index.html for projects.

Thanks,
Jake

Post by **GlassWolf** » Mon Mar 06, 2006 7:30 pm

http://www.diysubwoofers.org/tls/
http://www.quarter-wave.com/
http://geocities.com/rbrines1/
http://www.hogheaven.com/diyaudio/subwo ... /patl.html

geolemon · Post by **geolemon** » Mon Mar 06, 2006 8:06 pm

I think I can sum it up pretty easily, for a "what matters to you" sort of view:

1) Transmission Lines are difficult to build, particularly if you factor in the continual tapering of the line, and especially if you are going to build your transmission line in some sort of a "folded" capacity, so it isn't one big, unreasonably long tapered tube, but rather at least resembling a box.

2) Unless you are going to go all-out with a twice-as-long "1/2 wavelength theory" TL, I wouldn't bother - because the same results (phase coherency between "port" and sub) are basically accomplishable with a standard, simple vented enclosure.

OnYrMrk · Post by **OnYrMrk** » Mon Mar 06, 2006 8:18 pm

from what I understand, transmission lines transport the fluid from the pan to the transmission, likewise the brake lines transport the fluid from the master cylinder, likewise the blinker lines transport the fluid from the blinker tank.

geolemon · Post by **geolemon** » Mon Mar 06, 2006 8:33 pm

You mount REAL SMALL subwoofers in THOSE transmission lines.

solacedagony · Post by **solacedagony** » Tue Mar 07, 2006 4:50 am

What's the difference between the 1/2 and 1/4 wavelengths?

Post by **GlassWolf** » Tue Mar 07, 2006 7:19 am

about a quarter of a wave :)

solacedagony · Post by **solacedagony** » Tue Mar 07, 2006 8:10 am

Hahaha, good deduction.

Post by **GlassWolf** » Tue Mar 07, 2006 5:18 pm

the TL enclosures are tuned to a half or quarter wavelength of the tuned frequency of the port, as the name implies.

solacedagony · Post by **solacedagony** » Wed Mar 08, 2006 9:14 am

What is a wavelength, and would half the wavelength just mean half the tuned frequency of the port?