Step 8: Step 8: Sand, Glue and Stain (Optional)
You are also going to want to glue the speaker to it's cap from the inside and glue the speaker plate to the bottom panel of MDF. This will secure your speaker and reduce rattling.
While the pegs hold the panels together nicely you may want to use a little glue and clamp the panels together over night. You wont have access to the inside anymore so make sure everything is strongly secured, wired and soldered inside if you do this!