The ProX X-SPAM20 is an adjustable loudspeaker pole with an M20 thread.  Height adjustment is easy just mount to the top of a subwoofer with M20 thread and other end mounts to 1 3/8" speaker pocket  Pole is adjustable from 32" up to 63" total height. All Steel Construction with a built-in Safety Pin and Easy-Grip Tension Knob Height Adjustment.

More and more pole mount subwoofers are now equipped with an M20 threaded pole mount instead of a standard 1 3/8" socket cup.  This type of screw attachment provides for no tilt or wobble! The X-SPAM20 is designed for the modern production style of subwoofers as well as the original 1 3/8" pole pockets with the included threaded adapter to fit standard 1 3/8" pole pockets. Its all-steel shafts telescopes to the height you want held tight with a friction locking knob backed up by a captive steel security pin. The lower shaft features steel tubing terminated with a threaded lug. The upper shaft is sized to fit satellite speakers with standard 1 3/8" pole mounts.