My first Acoustic Control amp (the one from 1983) was meant to power another cabinet (a total of 2x 15″ drivers) but its as rare as hen teeth, so i decided to build my own. The above ones not mine, but its the exact model. I took the parent external sizes off mine, and basically went from there.

Using the above graphic from a off-the-shelf cabinet, i adapted the design, adjusted it to my exact material specs, and added dado’s & rabbet cuts at every intersection to maximize structural integrity. This meant certain parts got slightly longer (as internal widths expand when walls get thinner), but it also meant the whole structure got much stronger & resistant to vibration. The more a drivers enclosure vibrates, the less output you hear, and its especially noticeable with low end frequencies. In theory, if you had an enclosure that was flabby enough – like a balloon – it could effectively neutralize 100% of the sound of the driver, crazy!

Didnt think to shoot it routing, but here are my final CNC files and the resulting component stack…

and here are all the parts splayed out.

A zoom on the x-brace dogboned edge-lap joint…

and partially inserted.

Hows that for clearance & tolerance?

So with the x-brace in place, the sides literally lift up and due to painfully perfect clearances – total material thickness .752″ total width of channel .754″ – they are held in place.

Rough Assembly & Dry Fit Complete! As you can see in that last one, the face drops right in, still leaving room for a speaker grill cover that i may or may not make in the future, so it better matches the original acoustic enclosure.

Next up: Assembly with tools and things!