What started long ago as a simple question about possibly replacing my single 15" Revel B15a sub with a more capable 18" sub to give me better sub (pun intended) 20Hz performance led me here today. Not sure whether to thank or curse those who provided all the advice and recommendations. Well personally, I will thank you all. I will let my bank account do all the cursing.
I am using 1/2" MDF glued to 1/2" Baltic Birch. I am hoping that the MDF will make the enclosure more inert while the BB will give it a nicer final finish. The panels were glued together using PL Premium as well as the joints to avoid any visual screw holes. The box will be a 21.5" cube which should yield approximately 3.4 ft^3 after bracing and driver displacement.
This will be my first attempt at building my own speaker box. Well, sub at least. If it turns out ok, I may try my luck at building a 3 way speaker. All comments, critiques welcome.
Just a note, I started the build about six months ago and have already completed one box. This is the second box which is still under construction. Well, construction is technically done. I'm just staining it now. I just decided to document the second build and wanted to wait until I was nearly done before starting the thread since I am only able to work on it sparingly while my house remodel takes precedence. I didn't want to make this a year long thread with updates every couple of weeks or so.
Enough talking. Now for the build pictures.
Applying glue and spreading it out as even as possible.
Applying pressure and clamps. Waited 48 hours to allow the glue to fully cure.
Panels were bevel cut to lesson the visibility of the seams. I'm hoping this will also provide more surface area for the glue to reduce likelihood of failure. I'm very paranoid so I also screwed the MDF to the BB from the inside. Followed it up with a coat of TiteBond wood glue over the inside of the panel to prevent the screws from backing out as well as ensuring an airtight seal. I cut a groove down the center of the inside of the panels to attach the bracing to.
Bracing cut from old 3/4" CDX plywood I had lying around from my house remodel which is still ongoing to my GF's dismay.