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Amazon.com: Gator Frameworks Sub Speaker Subwoofer Pole with Crank Operated Height Adjustment. Includes Adapter for 35mm & M20 Threaded Mounts (GFWSPKSUBCRNK) , Black : Musical Instruments
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ProX T-SAACX2 PKG Dual Crank System Package Adjustable Speaker-Subwoofer Pole 1-3/8" diameter - from 34"-52" | ProX Live Performance Gear
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Amazon.com: On-Stage SS7746 Subwoofer Pole with M20 Thread (for Mounting a PA Speaker Above a Sub Cabinet, 1 3/8” Mount with Optional M20-Threaded Stem, 100 lb Capacity, Adjustable Height, Steel, Black) :
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