JBL VLA-C SERIES User Manual

26COMPPAMTvaPriblir| USER’S GUIDEWIRING THREE VLA-C-125S CABINETS IN A CARDIOID SUBWOOFERCONFIGURATIONA cardioid subwoofer system is a configuration that utilizes three subwoofer cabinets – two facingforward and one facing rear -- and three amplifier channels -- to cancel out a large percentage ofthe bass’s rear-projection from the array. Reduction of bass rear-projection is often desirable fordecreasing the build-up of bass frequency roll-around on stage, reducing the amount of bass thatenters stage microphones, cutting down bass reflections and the resulting interference frombehind-the-array acoustical boundaries, and making the subwoofer energy go mostly forward justlike the full-range speakers do.JBL’s VLA-C125S-ACC kit allows for neat inter-cabinet wiring of three VLA-C125S subwoofercabinets into a cardioid configuration – with two cabinets forward-facing and one cabinet rear-facing. The kit prevents having wiring exposed on the outsides of the cabinets and prevents havingthe wiring extend to the front side of the array (for connecting the rear-facing cabinet). See JBL’sVLA-C125S-ACC Cardioid Kit Guide.11 - ADDITIONAL VLA-C GUIDES• Suspension Bar Kit Accessory• VLA-C125S-ACC Cardioid Kit Guide