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Multi-Way Conventional loudspeakers with crossovers

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Old 12th January 2005, 07:09 AM   #1
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Location: Columbus, IN
Default Tb W3-871s

I have searched through the forums a little bit but am having trouble trying to find a Transmission Line box design for these. I will only be using one of these per TL. About 60w per in a fairly small room. I dont understand TL's that much...so a drawing with dimensions would REALLLLY help me out. Any help would be appreciated though. Thanks! (btw... I was referred here by Jim85IROC I think is his sn )

Will
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Old 12th January 2005, 07:31 AM   #2
joensd is offline joensd  Germany
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Hi Will,
you could have a look at post 4 here.
Thatīs the design Iīm using and am very happy with it.
See post 44 of the same thread for measurements and another picture.

Iīm using it nearfield with my PC but also tried it in a room with a sub.
The latter works well enough in small rooms but is very SPL-limited with only one driver.
I personally get away without a sub at my desktop but that depends on taste really.
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Old 12th January 2005, 04:52 PM   #3
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Mine will be :
Line length ===== 15.75"
area at top ===== 18.6 sq in
area at bottom ==18.6 sq in
port tube =======0.492" diameter, 1.18" length
driver position ===7.56" from top of line
port position ==== 14.76" from top of line

Can I get a drawing of the box with those dims on it? I dont get where the line length, area at top, and the area at bottom come in. I cant get a picture in my head of how that would look.

Will
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Old 12th January 2005, 05:34 PM   #4
joensd is offline joensd  Germany
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You can actually see the little pipe in post 15.
Area at top means the cross-section-area (youīll see the shortcut CSA here quite often) so (wide*deep).

In my case the original designs was 40cm high, 12cm wide and 10cm deep. Thatīd be 15,75*4,72*3,94in^3.(inner measures!!)

Please keep in mind that this was my first-time-DIY and that the measures are not 100% optimized.
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Old 14th January 2005, 08:14 AM   #5
joensd is offline joensd  Germany
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Hi Will,
hope you read the rest of the thread as well as I just realize you might have overlooked the error in post4.
0.492in is the radius of the port, not the diameter.
See attached pic in post48.

BTW: Even for a small room and low SPL Iīd consider a design like the ELF1.5 much more than this pipe which is perfect for nearfield.
But thatīs only my opinion.
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