Pro X Set of 2 | 20mm Threaded Deluxe Subwoofer Pole Mount | W-1 3/8 I Inch Adapter

The ProX X-SPAM20X2PKG is a package of two
X-SPAM20  adjustable loudspeaker poles with an M20 thread and an
included carrying bag.  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.