The idea here is to use a high grade ceiling speaker, purchased at a discount price off of an auction site, re-package it for surround sound duty. Here I used an EV C8.2. These go retail for about 350$ a pair. I have bought them on Ebay for as little as 20$ used. The EV (Electro-Voice) C8.2 is a solid, well built speaker. It has a 8 inch mid with a 1 inch titanium tweeter, it puts out a full sound with sparkling detail. But, it is made for recessed placement in a ceiling.
Most surround speakers are small, tinny devices. And over-priced. Sure, you can buy great speakers but hey , it's your money. My route is to re-purpose these for surround sound, aimed forward, not down, fill the room with sound.
Step 1: Build the boxes
The steps to build the faux speaker box are pretty straight forward.
My first plan was to build a six sided box. Fully enclosing the speaker. But this ended up being a huge 16x13 box, way to big to mount on a wall or put on a shelf. This led to the idea of a Hungarian slot shelf type thing. The speakers are kind of angled into the corner at 45* and I only have to cover up the speaker to mate it to the wall.
First build a box. I used 3/4 inch MDF. Screwed together and with wood glue too. Next , I found some Honduran Mahogany veneer sheets. I used contact cement brushed on the MDF and the veneer. Wait 20 minutes then press them together.