The box design is acoustically less critical than that for hi fi or pa systems but proper construction is essential.
Build your own 4x12 guitar cabinet.
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.
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.
Primarily the cabinet is a convenient way of housing the speaker so it should be solidly built to ensure no joint vibration unpleasant buzzing and be strong.
As guitar speakers are different so their cabinets are different.