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4Pi Pro port? [message #52390] Fri, 01 August 2008 05:41 Go to next message
Bill Epstein is currently offline  Bill Epstein
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Registered: May 2009
Location: Smoky Mts. USA
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Can the port be 6" wide by 3 1/2" tall and 10" deep? Or better yet, 10"w x 3 1/2" x 6" deep?

Re: 4Pi Pro port? [message #52391 is a reply to message #52390] Fri, 01 August 2008 11:11 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
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Registered: January 2001
Illuminati (33rd Degree)

The port should be 6" x 3.5" and 10" long. It doesn't matter if the wide dimension is horizontal or vertical, although if the tweeter is mounted internally, it's a tight fit and has to go the way it is. But if you move the tweeter up on top and move the woofer up to keep the distances the same, you can change where the port is. Don't change the length though, it should always be 10". Also, remember this is for the stock box size. If you make a larger box, the port size changes. You want the Helmholtz frequency to be 38Hz.


Re: Just returned with the plywood [message #52392 is a reply to message #52391] Fri, 01 August 2008 16:33 Go to previous messageGo to next message
Bill Epstein is currently offline  Bill Epstein
Messages: 1088
Registered: May 2009
Location: Smoky Mts. USA
Illuminati (2nd Degree)
Hope to have genuine 4 Pi Pro boxes glued up by Sunday night.

I'll put the horn on top and the woofer high up in the cabinet with the 6x3 1/2 slot below. Should be fun. Haven't built speakers in awhile.

I don't have the plans; center of horn to center of woofer should be 13 1/2"?

Re: Just returned with the plywood [message #52395 is a reply to message #52392] Fri, 01 August 2008 18:36 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18783
Registered: January 2001
Illuminati (33rd Degree)

I'll send the plans. Get the woofer and tweeter as close as possible vertically.


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