(1) I am building a pair of 4pi Theatres for my own use.

(b) I am building a pair of 4pi Theatres for my older son for his library/office/listening room,

(iii) and building the 7pi-18's for his living room.

Presently he does not have two adjacent corners to use the 7pi corner horns as designed. What Wayne suggested to me was to build bass bins identical to the 4pi Theatre cabinets, same ports, but simply put the Eminence Magnum HO 18's in these cabs instead of the Theatre's Delta 15's.

Presently I am in the process of cutting wood for three pair of cabinets 36" H x 24" W x 18" D. I will also build the proper 7pi-18 bass corner bins for my son to later simply remove the woofers and crossover from the 4pi bins and put into the corner horn bins.

What kind of wood are you using for all those speakers and where did you get it? I've been pricing baltic birch and getting prices of over $200 for A/A and around $80 for BB/BB in 4x8 sheets (looking in the San Jose area).

Thanks,
tim

tim

• My ply (with picture)

I have a plywood cutting jig I made that works well. Click the attached link. You will have to click on each image icon to view the photos if you are not registered at that site.

I use aliphatic wood glue with bats and screws, screwed from the inside so they don't show. I cover the ply edges with "birch tape". Then sand, stain, and apply several coats of hand rubbed tung oil.

• http://audiokarma.org/forums/showthread.php?p=1027581#post1027581

If the cabinet you are building is labor intensive or has a fine wood finish, then it would probably be a costly disappointment if a buzz developed and you had to scrap the box. Buzzes can develop years later, when plys separate or debris breaks loose inside a void. Sometimes, if a buzz develops, a small hole can be drilled in the cabinet interior into the section of the wood where the void or ply separation is. You can sometimes inject glue into the hole and repair the damage, fill the void or reattach the plys. But it's probably better to reduce the risk of failure, starting with a high-quality wood to begin with.