The black On-Stage M20 Speaker Cabinet Adapter allows you to upgrade your subwoofer from an existing 1-3/8" socket with the SSA20M threaded speaker adapter. This direct-replacement adapter is designed for most socket mounts and all you have to do is simply remove and replace.

M20 threading helps provide a rock-solid, wobble-free connection between the subwoofer and compatible speaker poles. This Speaker Cabinet Adapter is suitable for use with the SS7746 Adjustable Subwoofer Pole (sold separately). The M20 Speaker Cabinet Adapter is made from steel and ships with four mounting screws.