QSC LA108-KIT-SA Stack Adapter KitThe LA108 KIT SA from QSC is a stack adapter kit for LA108 speaker (speaker sold separately). The LA108 loudspeaker can be stacked over the LS118 subwoofer (upright or on its side), the KS118 (upright only), or the KS212C (on its side only). For stack deployment over these subwoofers, the following accessories are required: LA108 AF array frame and LA108 KIT SA stack adapter kit (two metal plates and hardware). Please note: This kit includes the plate