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Re: 4 PI by Andy [message #74027 is a reply to message #74018]

Wed, 03 October 2012 12:48

mantha3
Messages: 72
Registered: May 2012
Location: Lino Lakes, MN

Viscount

I thought I'd add my plan on these 4PI speakers. I'm going to build something similar to what a user Nicol1997 on this forum did on this thread (http://audioroundtable.com/forum/index.php?t=msg&goto=61737&#msg_61737)

• I would use the same 4PI crossover exact to Wayne's plan.
• I would space the 290 horn from the woofer exact to the 4PI plan only center the horn.
• I would have the speaker stand 7" taller. I plan to use two 4" Ports at 9-1/4" length on ea speaker. These are at the bottom of the speaker. I plan to run a lower internal brace at the point where the bottom board would normally be on a to plan 4PI. I'm thinking to run the router on this brace to cut holes in a variety pattern.. some 2" and some 3"... To allow for sound down to below this brace where the ports will run. I'll have the ports run down in the lower chamber and stuff that with the R13 and then lay a layer of R13 on top of the lower brace. I have these in mind (This is the outer piece of the tube that has a taper and the tube would be cut to attach to this )-

http://www.psp-inc.com/Graphics/PSP-4DOFH.jpeg

I used these on a subwoofer and I like the look and they work well.
• speaker box - 7" taller. trim one inch in width (17-1/2" instead of 18-1/2"). Add ¾" to the depth (15" instead of 14-1/4")
• Each speaker will have an upper brace which will be a criss cross of boards per speaker. Again, to the plan of a normal 4PI

I am planning to use Baltic Birch and I'm looking for the best grade I can get. Right now I have a line on 5' X 5' sheets. The speaker boxes are big and getting all the wood I'll need out of 2 sheets is a bit tight.... So I drew up some cut plans.

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[Message index]

		4 PI by Andy By: mantha3 on Wed, 03 October 2012 07:48
		Re: 4 PI by Andy By: mantha3 on Wed, 03 October 2012 08:04
		Re: 4 PI by Andy By: mantha3 on Wed, 03 October 2012 12:48
		Re: 4 PI by Andy By: Wayne Parham on Wed, 03 October 2012 13:14
		Re: 4 PI by Andy By: mantha3 on Wed, 03 October 2012 15:56
		Re: 4 PI by Andy By: mantha3 on Wed, 03 October 2012 16:22
		Re: 4 PI by Andy By: Wayne Parham on Wed, 03 October 2012 16:35
		Re: 4 PI by Andy By: mantha3 on Wed, 03 October 2012 17:52
		Re: 4 PI by Andy By: Wayne Parham on Wed, 03 October 2012 17:55
		Re: 4 PI by Andy By: mantha3 on Wed, 03 October 2012 18:00
		Re: 4 PI by Andy By: Wayne Parham on Wed, 03 October 2012 20:05
		Re: 4 PI by Andy By: mantha3 on Thu, 04 October 2012 07:24
		Re: 4 PI by Andy By: mantha3 on Sat, 03 November 2012 09:26
		Re: 4 PI by Andy By: mantha3 on Sat, 03 November 2012 09:30
		Re: 4 PI by Andy By: zheka on Sat, 03 November 2012 14:56
		Re: 4 PI by Andy By: mantha3 on Sat, 03 November 2012 16:39
		Re: 4 PI by Andy By: Wayne Parham on Sat, 03 November 2012 20:57
		Re: 4 PI by Andy By: mantha3 on Sun, 04 November 2012 16:14
		Re: 4 PI by Andy By: mantha3 on Sat, 10 November 2012 07:49
		Re: 4 PI by Andy By: Wayne Parham on Sat, 10 November 2012 10:04
		Re: 4 PI by Andy By: mantha3 on Sat, 10 November 2012 11:04
		Re: 4 PI by Andy By: zheka on Sun, 20 January 2013 09:25
		Re: 4 PI by Andy By: Wayne Parham on Sun, 20 January 2013 13:01
		Re: 4 PI by Andy By: zheka on Sun, 20 January 2013 13:41
		Re: 4 PI by Andy By: Wayne Parham on Sun, 20 January 2013 17:11
		Re: 4 PI by Andy By: mantha3 on Thu, 18 April 2013 13:01
		Re: 4 PI by Andy By: Wayne Parham on Thu, 18 April 2013 18:36
		Re: 4 PI by Andy By: mantha3 on Thu, 18 April 2013 19:55
		Re: 4 PI by Andy By: mantha3 on Thu, 18 April 2013 19:58
		Re: 4 PI by Andy By: Wayne Parham on Fri, 19 April 2013 00:02
		Re: 4 PI by Andy By: mantha3 on Fri, 19 April 2013 11:57
		Re: 4 PI by Andy By: Wayne Parham on Fri, 19 April 2013 12:56
		Re: 4 PI by Andy By: zheka on Sat, 10 November 2012 13:55
		Re: 4 PI by Andy By: zheka on Sat, 10 November 2012 14:00
		Re: 4 PI by Andy By: Wayne Parham on Sat, 10 November 2012 22:33
		Re: 4 PI by Andy By: mantha3 on Sun, 11 November 2012 08:15
		Re: 4 PI by Andy By: Wayne Parham on Sun, 11 November 2012 10:53
		Re: 4 PI by Andy By: mantha3 on Wed, 14 November 2012 19:59
		Re: 4 PI by Andy By: mantha3 on Fri, 07 December 2012 08:28
		Re: 4 PI by Andy By: zheka on Fri, 07 December 2012 08:49
		Re: 4 PI by Andy By: zheka on Sun, 20 January 2013 14:01

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