The On-Stage SSA21 Subwoofer Adapter's female M20 threading attaches to M20 speaker shafts to accommodate virtually any subwoofer on the market, utilizing both removable M20 threading and a tapered, zinc-lugged lower section to accept 1" cups. Whether it is a shallow M20, recessed M20, 1 3/8 cup or 1 3/8" cup with M20, the SSA21 will fit your subwoofer.
- Application: Subwoofer adapter with removable M20
- Upper Adapter: Accepts male M20
- Weight Capacity: 100 lbs.
- Lower Adapter: Tapered to 1 3/8" with removable M20 to fit all subwoofers on the market
- Includes: Allen key for M20 lug removal
- Construction: Steel