K&M 21441 Ring Lock Steel Adapter Sleeve for Speaker Stands | Black

The K&M 21441 adapter sleeve is designed for audio engineers and live sound technicians who need a reliable, rattle-free interface between a speaker stand and a passive or active cabinet. Compatible with stand tubes measuring 35mm in diameter, it installs by slipping over the stand tube and locking in place with a dedicated locking screw, making setup and breakdown fast during touring or one-off events.

What sets this sleeve apart from standard adapter inserts is the patented Ring Lock expanding mandrel system. Once inserted into the speaker's socket, the mandrel expands to create a tight, firm fit that eliminates the play and vibration that can compromise sound quality or, worse, create safety hazards over extended use. Moveable plastic splints isolate the speaker cabinet from the stand tube, preventing metal-on-metal contact and the micro-vibrations that accompany it.

Built from steel and finished in black, the 21441 is a straightforward but precision-engineered component suited for permanent installs, rental inventory, or touring rigs where component reliability is non-negotiable. It is the kind of hardware upgrade that live sound crews and AV integrators reach for when a standard sleeve is no longer acceptable.