On Stage SSA21 M20 Universal Subwoofer Adapter option-group-XPRS you can talk hands-free on

you can talk hands-free on calls when the headphones are connected to your phone

100 to 613

1" LFE Channel in a surround sound system

Two dedicated FX sends

On Stage SSA21 M20 Universal Subwoofer Adapter option-group-XPRS you can talk hands-free onOn Stage SSA21 M20 Universal Subwoofer Adapter 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. Features: Provides speaker shafts with M20