The ProX T-SAA-M is exactly what you need for your subwoofer-speaker PA system. It's adjustable in height from 38" to 54" and mounts between a subwoofer cabinet with a top mounting hole and a speaker with a bottom mounting hole sized at 1 3/8" (35mm). The T-SAA-M features both a friction locking knob and a security pin system and is made from durable steel.

Holds up to 120lbs