This design has almost an identical build process to the TB W3-871S project and I recommend reading that
for more textual commentary on the build process.
The 12 pannels cut from 18mm MDF. Top/bottom and baffle/rear accurately cut. Side panels cut slighly oversized.
Bottom, rear and side panel glued together first.
Rebate and rear chamfer cut to allow driver to breathe better. Driver fixing of
choice is 4mm threaded insert.
Top panel and baffle glued on next.
Connector holes cut using router chamfer bit.
Driver mounting check.
Final side attached. Cabinet edges flush trimmed with router. Bevelled edges cut on table saw.