24VTX B 18 | User ManualCAUTION: Make sure the total number of VTX B18 enclosures per circuit / amplifier does not exceed the maximumnumber recommended.10.4 - B18 USING I-TECH 4X3500HD (CARDIOID)Cardioid configurations can be created using Crown Audio I-Tech 4x3500HD amplifiers. In this case, anyone of the amplifier channelscan be set for cardioid using JBL Performance ManagerTM software application. Each amplifier channel is driving a single B18 enclosureand the channel selection switch at the back of the B18s can be used to assign B18 cabinets to the cardioid channels. In this configu-ration, the front grill NL4 connectors are used for wiring the rear facing B18 subwoofers.A BA BA BA BChannel SelectionSwitchCAUTIONSuspending this system shouldonly be done by qualified personsfollowing safe rigging practices.B18Compact Single 18” SubwooferIN/OUT IN/OUTA BChannel SelectionSNAmplifier ChannelsChannel 1 B18 1Channel 2 B18 2Channel 3 B18 3Channel 4 B18 4CH1/CH2 CH3/CH4OUTPUTSAmplifier Rear PanelCrown I-Tech 4x3500HD10.5 - CROWN AUDIO V-RACKVTX series systems are compatible with the Crown Audio V-Rack 12000HD and Crown Audio V-Rack 4x3500HD touring racks. Thenumber of supported cabinets per amplifier and wiring options remain the same as the Crown Audio I-Tech examples illustrated in thisdocument. For more information on the Crown Audio V-Rack products, refer to the V-Rack User Manuals and documentation.