SI HT18 D4 16cuft 15hz build

I am building these for forum member Zheka, originally these were going to be 10cuft boxes but after measuring the D4's they looked better in the larger ported boxes.



Pictures of the very nice looking drivers:








If you did not catch it in the SI thread here is the excursion video I made with a high FPS camera:




The enclosure is going to be 24"w x 30"h x 47.5"d built from 1/2" ply to keep weight down since these are going to be quite large and need to be moved to a different home. The port will be 10"w x 3"h x 20"L for a tuning of about 14-15hz.

Here is the sketchup model for the boxes:




Build will commence today so I should have an update later tonight.

Port is going to be 3" by 10" so 30 square inches.

Before I started cutting:


After I finished cutting:



The plywood inspection cat approves!

I started off assembling the slot ports. The panel on the end will be for the inside flare.




Here I am mark it out being sure to leave some excess material on there as it will be flush trimmed with the router for a nice smooth transition.






At the same time I was starting to glue the main panels together. Do you see something wrong with one of those clamps?




Here I am gluing the baffles together; one of those glue spreaders would come in handy for this.




Outside flare portion/lower baffle, cut and glued in place.






Then I started with the flush trimming and roundovers.






Once those where done I glued the woofer baffles on and glued that whole thing onto the box.






That is just about as far as I got over the weekend. The bracing will take some time to glue in, I have 25 two piece sections I need to glue together before I put them in and that is only for one cab. Anyone else use 100+ pieces of bracing in two subwoofers