Once the box and the front where complete, it was time to attach the two. Liberal application of silicone and more clamps sealed them together and prevented air from leaking. We added a support in the bottom of the box so that the shielding cylinders wouldn't sag or come loose. After the speakers were mounted, the electronics needed to be connected. A passive cross-over network was used to separate the high and low frequencies for the respective drivers. I purposely made sure that the cross-overs would be easily accessible so that if I wanted to change them in the future, it would be easy. Before I attached the lid, I tested the speaker extensivly. I found that the bass was somewhat weak and that the speaker sounded like it was inside a box. Filling the air space with insulation greatly improved the quality of the speaker. It tightened up the bass and made the speaker sound louder. Finally I sealed on the lid of the box and clamped it tight. A few coats of spray paint, and the speaker is complete!