Yes, you'll need two pieces to make up the bracing. One anchors the top panel to the internal dividing panel, and the second anchors the internal dividing panel to the vent panel. The vent has a center divider, so the whole arrangement should tie the top and bottom panels together.
Note, it should be possible to use the same form factor for a simple shelf-vented box. That will involve removing that internal divider panel and adding a bit of extension to the vent. I'll have a look at that possibility later today.
Note, it should be possible to use the same form factor for a simple shelf-vented box. That will involve removing that internal divider panel and adding a bit of extension to the vent. I'll have a look at that possibility later today.
Brian, what would be the benefits of this Offset-driver TL compared to a reflex box of the same/similar size? As far as I can see the only difference is the panel pointing towards the back of the driver. I've simulated a few ported boxes with 18sw115-8 of similar size to this, vent has to be huge handle the velocities. Just out of curiousity, mine is already installed in keystones and I have smaller cabs to handle smaller duties as of now.
The low frequency performance should be about the same. The offset-driver TL approach predicts the frequency where harmonic resonances from the vent are out of phase with the driver and allows you to position the driver to minimize the impact, at least at the first harmonic resonance. At least, theoretically. Practically, I've never built ne with and without the internal panel to confirm how much impact it has on the harmonic resonance effects.
That internal panel provides another advantage - it's a pretty effective brace for the side panels.
The OP's size requirements are basically what are dictating the size of the box and the vent for this design.
That internal panel provides another advantage - it's a pretty effective brace for the side panels.
The OP's size requirements are basically what are dictating the size of the box and the vent for this design.