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VTX B
15
| User Manual
8 - PRESET LIBRARY
The B15 preset library includes 60 and 80 Hz operating modes along with cardioid presets for rear-facing subwoofer enclosures. VTX
presets are exclusively developed for Crown I-Tech HD amplifiers and come bundled with Performance Manager control software. Au-
dio Architect™ presets are also available and can be downloaded from
. See below for a detailed description of B15
operating modes and processing options, and refer to the Preset Library setup sheets for preset descriptions, memory locations, and
output channel assignments.
8.1 B15 PRESET MODES
VTX B15 60:
The 60 Hz preset mode extends the upper frequency response of the subwoofer to 60 Hz. The 60 Hz preset is normally
employed when VTX cabinets are used in full-range mode.
VTX B15 60 REAR:
The 60 Hz Rear preset was designed to work in conjunction with the standard 60 Hz preset to drive rear-facing
cabinets in cardioid configurations.
VTX B15 80:
The 80 Hz preset mode extends the upper frequency response of the subwoofer to 80 Hz. The 80 Hz preset is normally
employed when VTX full-range cabinets are set to 80 Hz.
VTX B15 80 REAR:
The 80 Hz Rear preset was designed to be work in conjunction with the standard 80 Hz preset to drive rear-facing
cabinets in cardioid configurations.
8.2 TIME ALIGNMENT
The B15 presets provide proper system summation with companion VTX full-range cabinets (all models) in physically coupled config-
urations (stacked or suspended), and when used with corresponding 60 or 80 Hz presets. This pre-alignment is done at the factory,
allowing any VTX subwoofer to be used with any VTX loudspeaker without subwoofer presets specific to each system and configuration.
Additional time alignment delay should be added as needed to account for physical path length differences between suspended full-
range arrays and ground-stacked VTX subwoofers.
8.3 PRODUCT LINE COMPATIBILITY
The VTX B15 acoustical characteristics are compatible with those of the VTX B18 and B28. VTX B15, B18, and B28 can be combined to-
gether in the same system or array without summation problems. In systems combining the B15, B18, B28, or any other VTX subwoofer,
all subwoofers should be operated in the same mode. Mixing 60 Hz and 80 Hz presets in the same system or array is not recommended.
VTX A
-SERIES
VTX B
18
VTX B
28
VTX B
15
Summary of Contents for JBL Professional VTX Series
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