Hs anyone tried these......>

DIYIdaho · 9th December 2009, 05:05 PM

SOME PROPOSED SINGLE-DRIVER SPEAKERS

It has been 5 years since I've saved this and wonder if there has been any real success stories on this design?

I am fascinated by the technical attention and construction. Chuck

Bob Brines · 10th December 2009, 02:58 PM

There is a reason for no replies. TL technology has taken a large leap forward in the last few years, and your design has been relegated to a historical oddity. As it turns out, an end-loaded conventional TL is not the way to go. Also, the FE164 has been replaced with the FE167E and the FE168 sigma is out of production.

Almost all current TL designs involve mass loading so that a good start for the FE167E (and as it turns out both the FE164 and the FE168 sigma) works out to be 40" long with a cross section of 80in^2 and a port of 3"x4". The driver is placed ad 25% of the pipe length, which greatly reduces the harmonics in the pipe and as a consequence reduces the amount of stuffing required to get smooth mid-bass. These dimensions will give you an F3 ~40Hz.

You went to a lot of effort to make the bends in you pipe smooth curves, but this turns out to be counter productive. Square corners will suppress high frequencies and make the port output cleaner.

Sorry to be so negative, but time and technology march on.

Bob

jpbturbo · 11th December 2009, 01:42 AM

Smooth rounded curves will also cancel out a range of higher frequencies due to the wavefront becoming out of phase with itself.

-Josh

audioaction · 11th December 2009, 02:26 AM

Almost a shame to see those TL's be fully encased. Wish I had a couple of 1inch thick panels of plexiglass for the sides of my Fostex 206e BLH so I could show of the guts of the speakers. What a work of art. Anyways got to get around to building some TL's like that some day.

enigmaticEntity. · 12th December 2009, 10:39 PM

I like the way you built those - if I ever need to make tight curves, that could be useful

.

R-Carpenter · 13th December 2009, 03:01 AM

The main reason I think is that not too many people can do a project of this complexity and even if they can, patience is another issue.
While Fostex is not exactly my cup of tea, the project is admirable and deserves compliments.
Was this loudspeaker ever measured?

DIYIdaho · 13th December 2009, 03:17 AM

Hey, I'm not that good

.......This is someone elses idea and work that I fell in love with about 6-7 years ago. I never heard how it turned out......just loved the art of it and thought it would be the ultimate cabinet.

It kind of looks the way nature or God might have meant it to be.

Now that you have rudly awakened men it is going to be hard to give up and I still might build them for the shear beauty of it!

Maybe I could fill it with rocks to destroy those smooth curves

....never!

Chuck

planet10 · 13th December 2009, 04:43 AM

Quote:

Originally Posted by DIYIdaho

This is someone elses idea

Poinz (aka Eric Kingsbury)... probably best known for his Music Machine 6V6 PP.

dave

9th December 2009, 05:05 PM	#1
DIYIdaho diyAudio Member Join Date: Oct 2005	Hs anyone tried these......> SOME PROPOSED SINGLE-DRIVER SPEAKERS It has been 5 years since I've saved this and wonder if there has been any real success stories on this design? I am fascinated by the technical attention and construction. Chuck

11th December 2009, 01:42 AM	#3
jpbturbo diyAudio Member Join Date: Sep 2009 Location: The High Country	Smooth rounded curves will also cancel out a range of higher frequencies due to the wavefront becoming out of phase with itself. -Josh __________________ ...sword and pistol by his side.

13th December 2009, 03:17 AM	#7
DIYIdaho diyAudio Member Join Date: Oct 2005	Hey, I'm not that good.......This is someone elses idea and work that I fell in love with about 6-7 years ago. I never heard how it turned out......just loved the art of it and thought it would be the ultimate cabinet. It kind of looks the way nature or God might have meant it to be. Now that you have rudly awakened men it is going to be hard to give up and I still might build them for the shear beauty of it! Maybe I could fill it with rocks to destroy those smooth curves....never! Chuck

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10th December 2009, 02:58 PM	#2
Bob Brines diyAudio Member Join Date: Jan 2003 Location: Hot Spring Village AR	There is a reason for no replies. TL technology has taken a large leap forward in the last few years, and your design has been relegated to a historical oddity. As it turns out, an end-loaded conventional TL is not the way to go. Also, the FE164 has been replaced with the FE167E and the FE168 sigma is out of production. Almost all current TL designs involve mass loading so that a good start for the FE167E (and as it turns out both the FE164 and the FE168 sigma) works out to be 40" long with a cross section of 80in^2 and a port of 3"x4". The driver is placed ad 25% of the pipe length, which greatly reduces the harmonics in the pipe and as a consequence reduces the amount of stuffing required to get smooth mid-bass. These dimensions will give you an F3 ~40Hz. You went to a lot of effort to make the bends in you pipe smooth curves, but this turns out to be counter productive. Square corners will suppress high frequencies and make the port output cleaner. Sorry to be so negative, but time and technology march on. Bob

11th December 2009, 02:26 AM	#4
audioaction diyAudio Member Join Date: May 2003 Location: USA	Almost a shame to see those TL's be fully encased. Wish I had a couple of 1inch thick panels of plexiglass for the sides of my Fostex 206e BLH so I could show of the guts of the speakers. What a work of art. Anyways got to get around to building some TL's like that some day.

12th December 2009, 10:39 PM	#5
enigmaticEntity. diyAudio Member Join Date: Oct 2009 Location: Tasmania	I like the way you built those - if I ever need to make tight curves, that could be useful .

13th December 2009, 03:01 AM	#6
R-Carpenter diyAudio Member Join Date: Oct 2007 Location: Brooklyn Navy Yard	The main reason I think is that not too many people can do a project of this complexity and even if they can, patience is another issue. While Fostex is not exactly my cup of tea, the project is admirable and deserves compliments. Was this loudspeaker ever measured?

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