Vtx A12 Preset Library; Vtx A12 Preset Modes And Options - JBL VTX Series User Manual

9 - VTX A12 PRESET LIBRARY

The VTX A12 preset library includes standard array and fill (FL) operating modes, along with full-range and 80 Hz low frequency proc-
cessing for combinations of the A12 with VTX subwoofers. Presets for cardioid array configurations are included for all VTX subwoofer
models. VTX presets are exclusively developed for Crown I-Tech HD amplifiers and come bundled with Performance Manager control
software. Audio Architect™ presets are also available and can be downloaded from www.jblpro.com. Please see below for a detailed
description of VTX A12 operating modes and subwoofer processing options, and refer to the Preset Library setup sheets for preset
descriptions, memory locations, and output channel assignments.

9.1 VTX A12 PRESET MODES AND OPTIONS

Two preset modes and two low frequency processing options are available:
VTX A12 FL: The FL presets (short for FILL) have a nominally flat frequency response and are designed for situations where one or two
A12 cabinets are appropriate, such as for distributed front fills. With this preset, the acoustical low frequency response of the system
extends down to 45 Hz (full-range).
VTX A12 FL 80: The FL 80 presets have nominally flat frequency response and are to be used in situations where one or two A12 cabi-
nets are appropriate, such as for distributed front fills. With this preset, the acoustical low frequency response of the system is set to 80
Hz and used when subwoofers are available.
VTX A12: This is the standard VTX A12 preset for array use. A high frequency shelving response is applied to offset LF/MF array buildup
for nominally focused arrays (equally spaced impact points over the desired audience coverage area). With this preset, the acoustical
low frequency response of the system extends down to 45 Hz (full-range).
VTX A12 80: This is the standard VTX A12 preset for array use with subwoofers. A high frequency shelving response is applied to offset
LF/MF array buildup for nominally focused arrays (equally spaced impact points over the desired audience coverage area). With this
preset, the acoustical low frequency response of the system is set to 80 Hz. The VTX A12 80 preset will generate the highest A-weighted
maximum sound pressure level.
CAUTION: All preset options are available for both the VTX A12 (90-degree coverage pattern) and the VTX A12W
(120-degree coverage pattern) . A12 and A12W presets cannot be used interchangeably . Always use the appropri-
ate preset to guarantee proper system performance .
TIP:
• Both the full-range and 80 Hz presets can be used with subwoofers, depending on the application and subwoofer
arrangement. For more information on subwoofer use, see chapter 10 – Subwoofer Options.
• Mixing FL and standard presets in the same array is not recommended.
• The VTX A12 presets provide a well-balanced tonal starting point for a given array size. The Array Size Compensation
filter in the JBL Line Array Control Panel (LACP) can be used to further fine-tune tonal balance for a given array size
and shape. Please refer to chapter 12 - Line Array Control Panel for more information.
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