I would like to build a Speakeasy Roadbox Convertible replica and would like to know if someone has or could direct me to the cabinet dimensions for both upper and lower cabinets.
Any help would be greatly appreciated.
Since Speakeasy is defunct unless someone who has one can measure for you, you may get by with ballparking the measurements based on the rotor/speaker sizes you plan to use and work from there. Don't think there needs to be an exact dimension used as those parts are probably what Steve used to design the cab.
If I were building this, I would use thinner ply to reduce the weight and allow the cabinet to resonate. You could get by with 3/4" for the floor, back panels, woofer and upper driver shelves and then use 1/2" for the walls and top. Or 18mm and 12mm ply.
If I were building this, I would use thinner ply to reduce the weight and allow the cabinet to resonate. You could get by with 3/4" for the floor, back panels, woofer and upper driver shelves and then use 1/2" for the walls and top. Or 18mm and 12mm ply.
Having built several of these devices (not the Speakeasy, just generically), I can tell you this sentence is exactly true.
There is nothing redeeming about the ubiquitous "3/4 plywood" that many companies tout. It's sometimes handy for hard road use for things that get stacked or tumbled around. But generally, 1/2" is structurally fine. And consider this: even if it takes a tragically catastrophic gouge that penetrates the wood, so what? You got slots in it ANYWAY.
Resonance? I dunno. Sure. Stands to reason you'd pick up better resonance in a thinner cabinet, but as the whole purpose of a Leslie is sound modification, that might not be a top priority consideration. But it can't hurt.
Anyway, I've made mine from both light and heavy materials and will never make another thick one. The sound is in the bakelite horn, almost entirely. The rest is whatever a guy wants do. It's a long way from rocket science.
C2 1953, as old as I am and 760 rebuilt, Custom M3 1955, custom HX3, Hohner OAB, Ventilator, Service for friends on A100, B3, BV, M100 and some Leslies
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