26
JBL VLA-C SERIES
| USER’S GUIDE
WIRING THREE VLA-C-125S CABINETS IN A CARDIOID SUBWOOFER
CONFIGURATION
A cardioid subwoofer system is a configuration that utilizes three subwoofer cabinets – two facing
forward and one facing rear -- and three amplifier channels -- to cancel out a large percentage of
the bass’s rear-projection from the array. Reduction of bass rear-projection is often desirable for
decreasing the build-up of bass frequency roll-around on stage, reducing the amount of bass that
enters stage microphones, cutting down bass reflections and the resulting interference from
behind-the-array acoustical boundaries, and making the subwoofer energy go mostly forward just
like the full-range speakers do.
JBL’s VLA-C125S-ACC kit allows for neat inter-cabinet wiring of three VLA-C125S subwoofer
cabinets 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 having
the wiring extend to the front side of the array (for connecting the rear-facing cabinet). See JBL’s
VLA-C125S-ACC Cardioid Kit Guide.
11 - ADDITIONAL VLA-C GUIDES
•
Suspension Bar Kit Accessory
•
VLA-C125S-ACC Cardioid Kit Guide
