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Finishing details for π cornerhorns [message #46873] Thu, 12 May 2005 03:03 Go to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 17583
Registered: January 2001
Illuminati (33rd Degree)


Some people build their π cornerhorns with everything permanently attached to the bass bin. I've built a bunch of 'em that way too. But another way to do it is to pin the midhorn to the bass bin and to the tweeter. You can use a wooden dowel or aluminum rod to make positioning pins. Woodcraft sells table leaf pins that are perfect for this:



I just use the 8mm insert and then have 8mm aluminum pins made to fit into them. That way, the bass bin and midhorn both have holes in them and I install the pins when assembling the system.

http://www.pispeakers.com/misc/Attachment_Pins.jpg
Positioning pins


You can see the inserts in the bass bin, and the midhorn has them too, aligned so they position just right. I insert the dowels into the bass bin and lower the midhorn onto the pins.

http://www.pispeakers.com/misc/Midhorn_Pin_Socket.jpg
Insert the pins in the bass bin before setting the midhorn on top


If you're going to use the speakers at high power levels, you might want to place a rubber mat between cabinets. The material used for shower liner pans is perfect for this. Cut it to size, and it makes a nice gasket.

http://www.pispeakers.com/misc/Midhorn_Attachment.jpg
Lower the midhorn into position


The midhorn has a pair of holes on the top and on the bottom. The bottom holes pin to the bass bin and the top ones are for the tweeter.

http://www.pispeakers.com/misc/Tweeter_Pin_Socket.jpg
Positioning holes for tweeter on midhorn


Assembly is pretty easy. The face of each is flush and centered, so alignment isn't complicated. Once you get them lined up, they drop right in place. When everything is assembled, it is really solid and looks like this:

http://www.pispeakers.com/photos/7Pi.jpg
seven π cornerhorn
Re: Finishing details for π cornerhorns [message #46875 is a reply to message #46873] Thu, 12 May 2005 18:24 Go to previous messageGo to next message
BillEpstein is currently offline  BillEpstein
Messages: 886
Registered: May 2009
Illuminati (2nd Degree)
For those of us unable to use a tape measure, ME, these Dowel Centers are required, also from Woodcraft
Ya drill a hole in one part and put the center in it. Then ya lower the othere part into place and sit onit. The pin on the center marks the drilling location. Muy facil!

Re: Finishing details for π cornerhorns [message #46876 is a reply to message #46875] Fri, 13 May 2005 00:41 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 17583
Registered: January 2001
Illuminati (33rd Degree)

Great tip Bill, thanks!


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