one for the box builders

offroadbum · 27th September 2004, 07:20 PM

I was looking around the shop trying to find a little somthing to do.I ran across 2 mtx 12`s.Digging up the specs on the drivers
and mtx recomends 1.25 ft^3.
So after doing the math i came up with a 12x7 tube.if my math is right 3.14 x R x R x D.Never built a tube and looking for something differant to build.
What i`m wondering if anyone has ever tried a sealed tube.
thanks
donnie

Mikett · 28th September 2004, 02:42 AM

1. don't forget displacement of the woofer itself.
Volume is

2. you mistook D for R. R=0.5 This results in needing about 19" of tube length.

3. Since the cone displaces about 1/3 of the volume in it's depth, Add about 2" of tube length to accomodate the volume taken up by the woofer

4. Don't forget the end caps. Assuming you use 3/4" , you'll need extra .75"

Total so far is 19+2+.75=21.75"

Use 22" total tube length. ----- 7" was too good to be true!

offroadbum · 11th October 2004, 09:19 PM

yep it was to good to be true.
i figured it all wrong oh well.......
thanks

27th September 2004, 07:20 PM	#1
offroadbum diyAudio Member Join Date: Jan 2004 Location: tennessee	one for the box builders I was looking around the shop trying to find a little somthing to do.I ran across 2 mtx 12`s.Digging up the specs on the drivers and mtx recomends 1.25 ft^3. So after doing the math i came up with a 12x7 tube.if my math is right 3.14 x R x R x D.Never built a tube and looking for something differant to build. What i`m wondering if anyone has ever tried a sealed tube. thanks donnie __________________ Lost in wonderland.......... now where that rabbit go??

11th October 2004, 09:19 PM	#3
offroadbum diyAudio Member Join Date: Jan 2004 Location: tennessee	yep it was to good to be true. i figured it all wrong oh well....... thanks __________________ Lost in wonderland.......... now where that rabbit go??

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
Where are the ZV9 builders???	Tyimo	Pass Labs	202	29th June 2010 03:50 PM
calling all builders	rv1890	Multi-Way	3	22nd January 2005 10:02 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

28th September 2004, 02:42 AM	#2
Mikett diyAudio Member Join Date: Aug 2003 Location: Toronto	1. don't forget displacement of the woofer itself. Volume is 2. you mistook D for R. R=0.5 This results in needing about 19" of tube length. 3. Since the cone displaces about 1/3 of the volume in it's depth, Add about 2" of tube length to accomodate the volume taken up by the woofer 4. Don't forget the end caps. Assuming you use 3/4" , you'll need extra .75" Total so far is 19+2+.75=21.75" Use 22" total tube length. ----- 7" was too good to be true!

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