TL for a pair of 8's..... ?
10-19-2009, 08:49 PM
#22
500 Watt CAFz'r
Join Date: Jan 2008
Posts: 537
One, that's why I didn't take it too far. The enclosure ended up big. Even after folding it the length will be about 36". Add the half for the other driver and you've got a huge box. Figure 36Lx26Wx15H or some other ratio that gets the correct line dimensions.
10-19-2009, 09:22 PM
#23
10-20-2009, 07:08 AM
#24
This is why most people who know how to properly design TL enclosures don't use them in car audio. I can fit my 3 12's ported in a smaller footprint than a single 12 in a TL.
As the graph shows though... you get huge gains in the lower frequencies. They are great for home theater. I use an old-school 15W3. I've played with putting it into TL's but the boxes took up HUGE amounts of space. It's the first thing I'm going to play with when I get Martin Kings sheets.
Thanks again for all the VERY USEFUL info Kev.
As the graph shows though... you get huge gains in the lower frequencies. They are great for home theater. I use an old-school 15W3. I've played with putting it into TL's but the boxes took up HUGE amounts of space. It's the first thing I'm going to play with when I get Martin Kings sheets.
Thanks again for all the VERY USEFUL info Kev.
10-20-2009, 08:47 AM
#26
Hehehe... see, knowing that about the HT stuff makes me maybe want to give it a try for my setup at home.
Right now I have a Klipsch setup with a single downfiring 8"... it's nice but more is always better.
Either way... thanks for the help guys, this has been an eye opening experience!!
Right now I have a Klipsch setup with a single downfiring 8"... it's nice but more is always better.
Either way... thanks for the help guys, this has been an eye opening experience!!
10-20-2009, 07:09 PM
#27
500 Watt CAFz'r
Join Date: Jan 2008
Posts: 537
10-21-2009, 07:07 AM
#28
Hehehe... see, knowing that about the HT stuff makes me maybe want to give it a try for my setup at home.
Right now I have a Klipsch setup with a single downfiring 8"... it's nice but more is always better.
Either way... thanks for the help guys, this has been an eye opening experience!!
Right now I have a Klipsch setup with a single downfiring 8"... it's nice but more is always better.
Either way... thanks for the help guys, this has been an eye opening experience!!
Good luck man. I'll be sure to post my next HT TL.
10-21-2009, 10:05 AM
#29
No problem. For tube length I used 100 inches which is close to the correct 1/4wavelength after you consider the stuffing density. The impedance plots confirmed this. I ended up using moderate amount of stuffing because using lots was hurting the efficiency too much. With a Cauer Elliptical filter this could be usefull, but I still like the wider gain bandwidth of the tapered line.
I was only asking what you think of the 1/4 lambda of the Fs and Sd area way of making TL, that is the only way I know and I never knew of any TL software, that is amazing.
10-21-2009, 01:10 PM
#30
500 Watt CAFz'r
Join Date: Jan 2008
Posts: 537
. I like the 1/4 lambda tuning because it controls driver excursion at resonance and therefore distortion. As far as Sd area goes I find larger cross sections better for these longer lines. I also prefer offset driver to control ripple and if I'm using the line for a wideband application I almost always use a mass loaded type (ported). It controls the ripple better for a smooth response and easy transition to the midrange. Have you built many transmission lines?
