I designed two sets of computer/general TV speakers using the affordable Tang Band W3-881SI from Parts Express (no longer available!).
Using the parameters listed in the driver datasheet and the design equations found in “Introduction to Electroacoustics & Audio Amplifier Design”, I selected the size of the enclosure with the ratio 0.6×1.0x1.6.
My internal enclosure size is 7.75″ x 5″ x 3″. This gives outside dimensions of 9.25″ x 6.5″ x 4.5″. I decided to use 3/4″ MDF to build the speakers. This leads to the boards that need cut:
- Top & Bottom (2): 6.5″ x 4.5″
- Right & Left (2): 7.75″ x 3″
- Front & Back (2): 7.75″ x 6.5″
I cut a hole for the driver in the center of the front piece. The small driver’s holes were too small to use a router. A Forstner bit would have worked best, but they are pricey. I just out the circles on a scroll saw. Holes were cut in the back for speaker terminal plates.
I veneered the sides, top, and bottom of the speaker using Red Oak veneer. I used the iron & wood glue method to apply the pieces, then trimmed them down to size with a router. A simple grill was made with 1/4″ MDF cut out as a frame, then grill cloth was stretched over it and stapled. I held these onto the speaker with simple velcro.
For the price of the drivers, these speakers sound decent!