TL Terminus direction

h@kan · 6th November 2009, 06:09 AM

I'm building ceiling mounted TL's (see sketch #1) and my question is if there are any problems having the terminus firing towards each other. Will there be a cancellation effect with this setup? Would it be better to place the terminus on the front as sketch #2?

Regards H@kan

chrisb · 6th November 2009, 04:03 PM

I'd go for the front terminus.

Have you tried a small pair existing speakers in that location? I wonder if you might need some damping treatment to mitigate very early reflections from the ceiling.

h@kan · 07:56 PM

Yes I think I'l go for the terminus on the front. I have tried some damping in the ceiling with this in my precent setup (see picture) and I did remove it after a while. I kind of like the sound, at least from my listening position, without it. In my case the reflections from the ceiling added something good to the listening impression. I will for sure try with and without damping in my next setup.

Regards H@kan

h@kan · 18th November 2009, 01:35 PM

I have built one of the cabinets and measured the terminus with different damping.

Driver CHR-70
Line lenght 145 cm
Taper 5:1

Simulated

Setup

Damped with foam sheets.

Resulting FR graph

Damped with sheep wool (660g)

Resulting FR graph

Driver and therminus in same graph

Regards H@kan

h@kan · 26th November 2009, 08:12 PM

Finishing up. Can't wait to listen to them in the ceiling position.

Regards H@kan

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
TL's Offsetting the terminus?	schmeet	Multi-Way	12	11th August 2009 09:03 PM
Sub Amp..in need of direction	sickss	Solid State	2	16th February 2005 04:01 PM
Transmission line theory: terminus output	BAM	Multi-Way	1	26th March 2004 02:18 PM
ML-TL question: Meaning of dip at "Woofer and Terminus Far Field SPL"	JC Fardo	Multi-Way	3	14th February 2004 01:20 PM
Cornerloading the terminus of a TransmissionLine	jmiyake	Multi-Way	5	12th March 2003 02:12 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	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

6th November 2009, 04:03 PM	#2
chrisb diyAudio Member Join Date: Aug 2002 Location: victoria BC	I'd go for the front terminus. Have you tried a small pair existing speakers in that location? I wonder if you might need some damping treatment to mitigate very early reflections from the ceiling. __________________ you don't really believe everything you think, do you? community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi

18th November 2009, 01:35 PM	#4
h@kan diyAudio Member Join Date: Apr 2008	I have built one of the cabinets and measured the terminus with different damping. Driver CHR-70 Line lenght 145 cm Taper 5:1 Simulated Setup Damped with foam sheets. Resulting FR graph Damped with sheep wool (660g) Resulting FR graph Driver and therminus in same graph Regards H@kan

26th November 2009, 08:12 PM	#5
h@kan diyAudio Member Join Date: Apr 2008	Finishing up. Can't wait to listen to them in the ceiling position. Regards H@kan

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)