JBL VLA901Hi VLA White Paper - Page 16

Performance Stage Very large auditoriums or houses of worship (in excess of 5,000 seats) are excellent candidates for large line array systems. Again, JBL VLA SERIES arrays can improve the results of typical line array system by reducing overlap between arrays and spilling less energy on the side walls. Especially in very large, acoustically challenging rooms, the narrower and well-behaved coverage of the JBL VLA SERIES can improve the direct-to-reverberant ratio measured in the seats. These improvements will provide greater speech intelligibility and musical clarity. Outdoor Performance Venue The improved horizontal directivity of the JBL VLA SERIES line arrays can improve the focus of the system on the seating areas while reducing sound levels in surrounding neighborhoods. Using a JBL VLA601H or JBL VLA301H array instead of a conventional large format line array for mains can reduce the levels 90 degrees left and right of the stage by 4 to 6 dB between 500 and 2000Hz. For the very extreme throws for some of these types of events, a conventional large-format tour line array system simply may not be able to project to the distances required. The delay towers typically used to solve this problem may not be necessary in some cases if a JBL VLA SERIES array is used for the extreme throws. Computer Modeling Modeling the JBL VLA SERIES arrays can be done in two ways. The JBL VLA Calculator is available to provide simple, 2-D modeling of the arrays response on the seating planes. An example screen is shown below: 15