Zähl Rack 500 Dual; 500 series desktop case with 2 slots ; compatible with API 500 standard; connections per slot: 1 x XLR In and 1 x XLR Out; 48V phantom power switchable; Power Thru connector for power supply of a second Zähl Rack 500 Dual; incl. external power supply PSU 500-44; One power supply can supply two Rack 500 Dual