Yamaha ADP138 Stand Mount For Stagepas 300 Speaker

YAMAHA POLE ADP138 ADAPTER: Mount Your StagePas 300 On A Speaker Stand The ADP138 lets you easily mount the StagePas 300 speaker system on a standard 1-3/8" (35mm) tripod stand or pole. Mounting screws are already installed in the speaker systems for this purpose. The ADP138 can also be used for the MSR100 speakers.