Thank you for the answers to my many questions via email. I thought I would switch venues so perhaps others could also benifit. I have been surfing many websites relating to building speaker cabinets. A common feature of cabinets the size that i am proposing to build (pro four pi) have substantial bracing, and in some cases 1" mdf of two layers of 3/4" mdf are employed.

Are such measures necessary for the cabinets that you have designed?

Thanks again for all of your help.

Tom

I said either a 2x4 along it's middle in the back or even a 4x4.

Is this sound thinking? In other words, less and larger v. more and smaller?

The trick is to drill holes to use for filling. Be very careful with this - overfilling will split the panels with ease. I have found that the "quick curing" foam avaliable at local hardware stores does not cure in a homogenous mass, so it will grow in "stalagtites" within the cabinet and can split the cabinet long before it is full. So be careful with this stuff.

Hardwood plugs are available at most hardware stores. They're usually available in many sizes, and I prefer to use the 1/2" diameter plugs. They're essentially 1/2" dowel rods that have been cut into 3/8" length sections. That's another way to create plugs for exotic woods - if premade plugs can't be found.