The QSC SP-26 is a loudspeaker pole. This black-painted, metal pole is 26-inch (660 mm) long with a 35 mm diameter and features a male M20 thread on one end. The installation of the SP-26 loudspeaker pole is straightforward as the pole end with the male M20 thread is screwed into the available QSC KS Series active subwoofers M20 female-threaded socket. The main loudspeaker is fitted on the top of the pole by inserting the upper pole-end into the available pole socket on the bottom of the loudspeaker. Consult the QSC KS Series User Manual to determine which poles - and pole combinations - are safe to use with the various QSC main loudspeaker Series.