AudioRoundTable.com: Speaker » voight pipe plans for 206 Fostex

Home » Audio » Speaker » voight pipe plans for 206 Fostex

Show: Today's Messages :: Navigator :: Polls
E-mail to friend

voight pipe plans for 206 Fostex [message #20896]

Mon, 09 May 2005 10:14

jim denton
Messages: 162
Registered: May 2009

Master

I guess the only way I'll satisfy my questions as to how the FE206e's will sound in the Voight pipe design is to build them---I have a good plan in a 6" driver but could use some spec's for the 8 inch--I have talked to Brad ( cabinet builder) about using some solid hardwoods over plys---we'll about that---anyone seen a 8" plan?? Jim

Report message to a moderator

Re: voight pipe plans for 206 Fostex [message #20897 is a reply to message #20896]

Mon, 09 May 2005 11:03

FredT
Messages: 704
Registered: May 2009

Illuminati (1st Degree)

The only plan I have seen is at the link below. It seems to be about the same size as your current pipes. It uses the 207 instead of the 206. I have been considering building another set of Voigt pipes for my Audio Nirvana 8" drivers, whose T/S parameters are close to the 206. I will make them in a slightly larger cross section, dictated by the 11-1/4" width of the mdf boards I get from my lumber source. But hardwood would look really nice.

Voigt Pipes for 8" Fostex Drivers

Report message to a moderator

Re: voight pipe plans for 206 Fostex [message #20899 is a reply to message #20897]

Mon, 09 May 2005 16:54

roncla
Messages: 125
Registered: May 2009

Master

Well there is a major diffierence in Qts. Some added series resistance will help (4-6 ohms). Be sure to use at least 10 watt non inductive resistors. I had my original 206es in a break in, folded TQWT and it took the added series resistance to get an acceptable bass response.
ron

Report message to a moderator

Good Thing to Know [message #20900 is a reply to message #20899]

Mon, 09 May 2005 18:03

FredT
Messages: 704
Registered: May 2009

Illuminati (1st Degree)

If you must use series resistance I wounder if you could parallel the resistor with a 1.5mH inductor to create a baffle step compensation network?

Report message to a moderator

Re: Good Thing to Know [message #20901 is a reply to message #20900]

Mon, 09 May 2005 20:50

Bob Brines
Messages: 186
Registered: May 2009
Location: Hot Springs Village, AR

Master

Sorry, Fred. That won't work. The series resistor is just to raise the effective Qts of the driver up to the level needed for a Voigt Pipe. The BSC step filter comes after that.

My personal dislike for the Voigt pipe is well known, particularly the Lowther Club of Norway TQWT that one of the links is really pointing at. But if you must, use the FE207E rather than the FE206E. You will have a much better chance as a decent sound.

Bob

Report message to a moderator

Opinions on Voigt Pipe [message #20902 is a reply to message #20901]

Tue, 10 May 2005 12:51

GarMan
Messages: 960
Registered: May 2009

Illuminati (2nd Degree)

Hi Bob,

I'm interested in hearing your opinion of Voigt Pipes. Do you have a link to it, or can you provide a 60 sec tour?

thanks,
gcl.

Report message to a moderator

Re: Opinions on Voigt Pipe [message #20903 is a reply to message #20902]

Tue, 10 May 2005 14:10

Bob Brines
Messages: 186
Registered: May 2009
Location: Hot Springs Village, AR

Master

This link is what I discovered about the classic Voigt pipe, which BTW, is not wat Paul Voigt had intended. But that's another story.

GM points out, quite correctly, that the zero So pipe does have a use with certian drivers, but in general you must give up bass extension for mid-bass smoothness. The classic VP with extension below Fs is fatally flawed.

Bob

Voigt Pipes

Report message to a moderator

Re: voight pipe plans for 206 Fostex [message #20904 is a reply to message #20896]

Tue, 10 May 2005 14:18

zobsky
Messages: 39
Registered: May 2009

Baron

if you're having a cabinet builder build it, why not just go for a back horn. Ron's design seems to be liked.

Another interesting post I came across today on AA using the 206 E (though in a 2 way) at http://www.audioasylum.com/forums/hug/messages/88224.html

cheers, nice meeting you a few weeks ago at GPAF.

Report message to a moderator

Voigt Pipe Alternative for FE-206 [message #20905 is a reply to message #20896]

Tue, 10 May 2005 19:43

FredT
Messages: 704
Registered: May 2009

Illuminati (1st Degree)

The only advantage to a voigt pipe appears to be its simplicity - it's very easy to build one. In contrast, all the back loaded horn enclosure plans I have seen for the FE-166 and 206 would require some woodworking skills and seem to be very labor intensive. I was wondering if there's a simpler plan, possibly like the BK-16 folded horn that Madisound offers as a flat pack kit for $98?