CSS Audio Offers a high-end DIY Speaker Kit Called the Criton 1TD-X. Utilizing their quality audio components, I redesigned the bookshelf unit while keeping the same internal volume.

I wanted to take the opportunity to learn how to work with new materials. I used glass fiber reinforced concrete. This dense material stops the cabinet from vibrating, efficiently transferring all the vibrations from the speaker cones to soundwaves. I used black cherry from the north shore of lake huron, with a tung oil Finish for the front and back faces, and sealed the concrete with a clear coat.

Magnets rest just below the surface of the wood face, allowing for the 3d printed speaker covers to magnetically attach without adding any visual disruptions. 

Concluding  Lessons

Another issue was that it would be difficult to seal this design with the air leaking through the curfing, and it would be difficult to block off the curfing without filling it with glue- which could look bad from the side profile. also the back curfing needed to hinge so filling it with glue was not an option. these issues along with previous ones led to a redesign of the project. I did have success with the internal ribs though and kept those in my final design.