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View Full Version : tlines/chambered tlines.



mjf
03-09-2008, 04:42 PM
need someone to help with the latter more. but anyway.

ive been messing around with designing a box for an rd audio alpha v1 12" (basically an atomic ele)

http://img.photobucket.com/albums/v284/mjf595/th_alphactline.jpg (http://img.photobucket.com/albums/v284/mjf595/alphactline.jpg)
http://img.photobucket.com/albums/v284/mjf595/th_alphactline1.jpg (http://img.photobucket.com/albums/v284/mjf595/alphactline1.jpg)

total chamber area is 1.416 and port area is 75"^2 (6"x12.5") and the line length is 90

this roughly gives the line as far as tlines go, a tuning of 37/38

im just having a bit of trouble trying to figure out how this will end up, whether i have the correct chamber volume or what else.

any input would be appreciated

mjf
03-09-2008, 05:46 PM
anyone?

mjf
03-09-2008, 06:15 PM
anyone?

mjf
03-09-2008, 07:18 PM
hmmmmmmmmmmmmmmmmmm

05F150SuperCrew
03-09-2008, 07:50 PM
i thought tlines didn't have a chamber...

groundpound4200
03-09-2008, 07:55 PM
I just finished up my T-box today..... unfortunately I didnt design it though so Im not much help. Ask Pete from PWK designs, he will probably help you out. Yours does look proportionately similar to mine though. Why the side-firing port?

mjf
03-10-2008, 12:39 AM
I just finished up my T-box today..... unfortunately I didnt design it though so Im not much help. Ask Pete from PWK designs, he will probably help you out. Yours does look proportionately similar to mine though. Why the side-firing port?

dont have the money to ask pete, ive asked for his input and all he does is explain what a chamber in a tline does, no help with designing them.

what sub do you have? hell, if you could send me one im just trying to figure out the chamber volume vs port area and line length.

groundpound4200
03-10-2008, 02:25 PM
My sub's a Digital Designs 3515...
http://i47.photobucket.com/albums/f159/hooperm/T-Box.png
http://i47.photobucket.com/albums/f159/hooperm/DSC01289.jpg

yama168
03-10-2008, 04:52 PM
wow ground pound thats a mighty fine design and build you got there. looks great want to see finished pics when done.....





Aloha

Trey803
03-10-2008, 04:55 PM
so what does this kind of box do to the frequency response of the sub. Im guessing its for spl?

J31Rob
03-10-2008, 07:03 PM
My sub's a Digital Designs 3515...
http://i47.photobucket.com/albums/f159/hooperm/T-Box.png
http://i47.photobucket.com/albums/f159/hooperm/DSC01289.jpg

holy ****.

pete still hands out that design? i bet he still makes people pay for it too..

i've had that design for the 3515 & 3512 for over a year now.. lol.

J31Rob
03-10-2008, 07:03 PM
only thing he changed was the port is flared in my design, same t-line though.

BrianChia
03-10-2008, 07:06 PM
How much does he typically charge for designs?

mjf
03-10-2008, 07:07 PM
only thing he changed was the port is flared in my design, same t-line though.

agreed, its funny.:laugh:


ground could you care to pm me the specs so i could look it over?

i just want to check if my ideas will work.

thanks

mjf
03-10-2008, 07:07 PM
How much does he typically charge for designs?

$60

BrianChia
03-10-2008, 07:13 PM
Martin King's MATH CAD sheets are only $25, FYI, and you can model T-lines, horns, and other quarter wave resonators.

mjf
03-10-2008, 07:14 PM
http://img.photobucket.com/albums/v284/mjf595/3512tbox1.jpg

mjf
03-10-2008, 07:19 PM
Martin King's MATH CAD sheets are only $25, FYI, and you can model T-lines, horns, and other quarter wave resonators.

im fine with modeling tlines as is, its just the chamber portion im debating.

twisztdauthorit
03-10-2008, 07:20 PM
mine never had a chamber =/ wouldnt mind build a second one some day though

mjf
03-10-2008, 07:25 PM
mine never had a chamber =/ wouldnt mind build a second one some day though

yeah, its been done before, but im just trying to help push up the power handling a bit with still maintaining the idea of a tline.

its jsut trying to find out the chambered portion in relation to port area vs line length

mjf
03-10-2008, 09:05 PM
if anyone wants the few i have on my computer, feel free to ask.

BrianChia
03-10-2008, 09:14 PM
im fine with modeling tlines as is, its just the chamber portion im debating.

What software are you using? King's sheets should model rear loaded and front loaded enclosures with and without chambers.