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description: Audio advice and discussions with audiophiles and professionals. Free discussion forums, open to all and frequented by industry experts. Ask questions and get advice on stereos, speakers, hi-end amplifiers, pre-amps, home theater, tube hi-fi, turntables, vinyl, tweaks, music, films, video, DVDs and more.
items: Theater 4 or 3 Pi in Onken enclosure?
items: Re: Theater 4 or 3 Pi in Onken enclosure?
items: Onken calculator

Theater 4 or 3 Pi in Onken enclosure?
type: item
description: Any thoughts on this idea? I've searched the archives and not seen it.
creator: Tightwad
date: 2004-02-11T15:48:23-00:00

Re: Theater 4 or 3 Pi in Onken enclosure?
type: item
description: 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.
creator: Wayne Parham
date: 2004-02-12T04:21:08-00:00

Re: Theater 4 or 3 Pi in Onken enclosure?
type: item
description: 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
creator: JLapaire
date: 2004-02-13T11:29:08-00:00

Re: Theater 4 or 3 Pi in Onken enclosure?
type: item
description: 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. http://www.studiomaudio.com/onken.html
creator: Tightwad
date: 2004-02-13T18:03:50-00:00

Re: Theater 4 or 3 Pi in Onken enclosure?
type: item
description: This is a very nice look and has possibilities - can you give me the link to the calculator?
creator: HenryW
date: 2004-02-15T14:39:26-00:00

Onken calculator
type: item
description: 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. http://melhuish.org/audio/download/ONKEN_CALC.xls
creator: Tightwad
date: 2004-02-17T17:49:46-00:00