Home » Sponsored » Pi Speakers » Theater 4 or 3 Pi in Onken enclosure?
Theater 4 or 3 Pi in Onken enclosure? [message #43915] Wed, 11 February 2004 09:48 Go to next message
Tightwad is currently offline  Tightwad
Messages: 41
Registered: May 2009
Baron

Any thoughts on this idea? I've searched the archives and not seen it.

Re: Theater 4 or 3 Pi in Onken enclosure? [message #43920 is a reply to message #43915] Wed, 11 February 2004 22:21 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18787
Registered: January 2001
Illuminati (33rd Degree)
Some π designs use a rectangular port, but none have ever used a long slot or series of ports along both sides. It is an attractive design though, and I see no reason why it wouldn't work just fine.

Re: Theater 4 or 3 Pi in Onken enclosure? [message #43932 is a reply to message #43915] Fri, 13 February 2004 05:29 Go to previous messageGo to next message
JLapaire is currently offline  JLapaire
Messages: 156
Registered: May 2009
Master

Tightwad, I can't see the image in your post - is it similar to the above? I've used deep slots for tuning with some success when for whatever reason a tube wouldn't fit. I think they're more resistive than tube ports though and care is needed when the height/width ratio gets large.

John

Re: Theater 4 or 3 Pi in Onken enclosure? [message #43938 is a reply to message #43932] Fri, 13 February 2004 12:03 Go to previous messageGo to next message
Tightwad is currently offline  Tightwad
Messages: 41
Registered: May 2009
Baron
Yes, exact same thing. Here's a link to the page from which the picture comes. It's the original Jensen Ultraflex design.

I've found an Onken calculator (Excel spreadsheet) online which yields volume and vent numbers from T-S params.


Re: Theater 4 or 3 Pi in Onken enclosure? [message #43955 is a reply to message #43938] Sun, 15 February 2004 08:39 Go to previous messageGo to next message
HenryW is currently offline  HenryW
Messages: 44
Registered: May 2009
Baron
This is a very nice look and has possibilities - can you give me the link to the calculator?


Onken calculator [message #43980 is a reply to message #43955] Tue, 17 February 2004 11:49 Go to previous message
Tightwad is currently offline  Tightwad
Messages: 41
Registered: May 2009
Baron
Here is a direct link to the Excel file, from James Melhuish's web site.

I believe an Onken bass box is still the standard accompaniment to the Oris horns, so if you are interested check out Oris's web page.

I have tried hunting around for Onken's article on the design, with little luck.


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