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Recessed flange for pole-mount.
Upgrade your subwoofers! Replace existing 1 3/8" sockets with the SSA20M threaded speaker adapter. Designed to be a direct replacement for most socket mounts; simply remove and replace. M20 threading provides a rock-solid, wobble-free connection between the subwoofer and compatible speaker poles. Perfect for use with the SS7746 Adjustable Subwoofer Shaft.
Order today and fix your flanges.
Reviewed by 1 customer
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Comments about On-Stage Stands M20 Speaker Cabinet Adapter:
I've just bought an M20 adapter for subwoofers... to use with the SS7747 adjustable pole... but it would have helped if On-Stage published the outside diameter in place of generic wording like "replaces existing 1-3/8" sockets." The actual outside diameter is approx. 4-5/16", too large to fit flush in the 4" routed area where my original socket fits (EV ZXA1-Sub). Also, the original is a three-screw arrangement with backing hardware, versus 4 simple wood screws with yours (this part, easily fixable). Grinding metal off the adapter or routing more area on the cab is too much work. FWIW, I've also recommended a better solution would be to change the design to an M20 threaded socket within (at the bottom of) a two-inch deep 1-3/4" socket, so the SS7747 pole is physically supported in two ways: pole itself, plus threaded reinforcement. I like the pole… but it's gonna be too much trouble to use it. If the existing socket had been recessed in a 4-5/6" mounting area on the sub, different story (although attaching with backing hardware would be better than simple wood screws).
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