April 3 2014 this handbook covers all the major kinds of cab types you re likely to want to try and build from horn loaded subwoofers to 4x12 guitar cabs along with advice on dimensions fixings materials and.
Build your own 4x12 guitar cabinet.
Cut two pieces to 14 by 30 inches for the top bottom and two pieces 14 by 28 for the two sides of the cabinet.
Draw circles for the speakers on the front panel of the cabinet with a compass or large protractor.
Back in the 90s celestion put together a comprehensive guide to designing and building your own cabinet the cabinet handbook.
As guitar speakers are different so their cabinets are different.