Check the listing for details. QSC Basis 922uz BASIS-922UZ Amplifier/Loudspeaker Control Processor. Condition: Used. Listed at 148.99 USD. This sale is for (1) one QSC Basis 922uz. Scratches and general wear on all sides of unit. (see pictures). We have a limited knowledge of their prior use. If there is an issue with the order, it will have to be sent back.