Ping GM/Pkitt: MLTL for Lambda TD12M?

JoshK · 21st May 2009, 07:36 PM

I have been immensely curious what type of tranmission line would be suitable for the Lambda TD12M. I own a pair and the idea is quite appealing in many ways.

I don't have Martin's software because he isn't sharing it anymore (actually I have the old free one, but not MathCAD). Would it trouble you to model such a driver so I could take a look at what the results would look like?

The driver specs for the TD12M are here:
TD12M - 8ohm
Fs: 38.1Hz
Qms: 2.99
Vas: 140L
Cms: .35mm/N
Mms: 50g
Rms: 4kg/s
Xmax: 6mm
Sd: 531sqcm
Qes: .27
Re: 6.6
Le: .2mH
Z: 8ohm
Bl: 17Tm
Pe: 500W
Qts: .25
1W SPL: 96.5dB

augerpro · 21st May 2009, 08:52 PM

Josh I had Paul do a work up last week on the TD12M and after much fiddling he said it just won't work well do to the low Qts.

JoshK · 21st May 2009, 08:59 PM

Thanks Brandon. I used the tables and couldn't figure it out either. Thought it just might not be flexible enough for said driver.

JoshK · 21st May 2009, 09:02 PM

Maybe then the Faital 12PR300 that is on sale might be a better candidated for a TL. I don't want to ask others to do a work up on a list of drivers. I was just curious about the ones I had.

http://www.usspeaker.com/faital%20pro%2012pr300-1.htm

pkitt · 21st May 2009, 09:14 PM

Maybe GM has some tricks up his sleeves that are better or more numerous than mine and can come up with a workable TL for the TD12M?!

Quote:

Originally posted by augerpro
Josh I had Paul do a work up last week on the TD12M and after much fiddling he said it just won't work well do to the low Qts.

JoshK · 22nd May 2009, 03:49 PM

Well certainly the high output Z of a SE tube amp which I am using will help, but it seems like it might not be enough. I'd rather not force a solution and instead find the appropriate tool for the job.

GM · 22nd May 2009, 04:21 PM

Quote:

Originally posted by JoshK
Well certainly the high output Z of a SE tube amp........

How high?

GM

JoshK · 22nd May 2009, 04:44 PM

Truth is I don't know. I could calculate it but local feedback obscures (to me) the math. Its Pete Millett's SE KT88 E-linear amp.

GM · 22nd May 2009, 04:48 PM

Ask him then.........

GM

JoshK · 22nd May 2009, 04:51 PM

I asked him some other questions before about the design and he said he lost his notes on it.

21st May 2009, 07:36 PM	#1
JoshK diyAudio Member Join Date: May 2004 Location: Toronto, ON	Ping GM/Pkitt: MLTL for Lambda TD12M? I have been immensely curious what type of tranmission line would be suitable for the Lambda TD12M. I own a pair and the idea is quite appealing in many ways. I don't have Martin's software because he isn't sharing it anymore (actually I have the old free one, but not MathCAD). Would it trouble you to model such a driver so I could take a look at what the results would look like? The driver specs for the TD12M are here: TD12M - 8ohm Fs: 38.1Hz Qms: 2.99 Vas: 140L Cms: .35mm/N Mms: 50g Rms: 4kg/s Xmax: 6mm Sd: 531sqcm Qes: .27 Re: 6.6 Le: .2mH Z: 8ohm Bl: 17Tm Pe: 500W Qts: .25 1W SPL: 96.5dB

21st May 2009, 08:52 PM	#2
augerpro diyAudio Member Join Date: Aug 2006	Josh I had Paul do a work up last week on the TD12M and after much fiddling he said it just won't work well do to the low Qts. __________________ ~Brandon DriverVault Soma Sonus Old Driver Tests

22nd May 2009, 04:48 PM	#9
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Ask him then......... GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Beyma tpl-150 + Lambda TD12M's	studiotech	Multi-Way	21	24th July 2009 12:51 PM
AE TD12M cheap alternative - Faital 12PR300?	Defo	Multi-Way	60	13th June 2009 12:21 AM
JBL 2206H vs. Lambda TD12M	Defo	Multi-Way	10	27th March 2009 11:34 PM
Ping SY	JoshK	Tubes / Valves	32	27th March 2009 12:12 PM
Ping SY	moray james	Planars & Exotics	3	16th June 2005 04:39 PM


	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

21st May 2009, 08:59 PM	#3
JoshK diyAudio Member Join Date: May 2004 Location: Toronto, ON	Thanks Brandon. I used the tables and couldn't figure it out either. Thought it just might not be flexible enough for said driver.

21st May 2009, 09:02 PM	#4
JoshK diyAudio Member Join Date: May 2004 Location: Toronto, ON	Maybe then the Faital 12PR300 that is on sale might be a better candidated for a TL. I don't want to ask others to do a work up on a list of drivers. I was just curious about the ones I had. http://www.usspeaker.com/faital%20pro%2012pr300-1.htm

22nd May 2009, 03:49 PM	#6
JoshK diyAudio Member Join Date: May 2004 Location: Toronto, ON	Well certainly the high output Z of a SE tube amp which I am using will help, but it seems like it might not be enough. I'd rather not force a solution and instead find the appropriate tool for the job.

22nd May 2009, 04:44 PM	#8
JoshK diyAudio Member Join Date: May 2004 Location: Toronto, ON	Truth is I don't know. I could calculate it but local feedback obscures (to me) the math. Its Pete Millett's SE KT88 E-linear amp.

22nd May 2009, 04:51 PM	#10
JoshK diyAudio Member Join Date: May 2004 Location: Toronto, ON	I asked him some other questions before about the design and he said he lost his notes on it.

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

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