17
VTX B
15
| User Manual
9 - AMPLIFICATION & WIRING
The B15 subwoofer, like all other VTX systems, is powered exclusively by Crown I-Tech HD amplifiers, providing consistency and opti-
mum performance anywhere in the world. All B15 processing is performed by the I-Tech HD’s internal processing, which includes the
advanced LevelMax
TM
three-stage limiter suite, ensuring proper, reliable B15 operation under any conditions. LevelMax incorporates
excursion control, RMS limiting, and long-term thermal protection for the woofers. The I-Tech HD amplifiers also offer a user-adjustable
input section for equalization, time alignment, and electronic delay steering. Standard JBL presets are available for both the Crown
I-Tech 4x3500HD and I-Tech 12000HD. The most up-to-date presets are available for download from
, and bundled in
the latest version of Performance Manager control software.
9.1 CROWN I-TECH 12000HD
Up to six B15 subwoofers (three per channel) can be powered by an I-Tech 12000HD amplifier. The example below shows how to con-
nect six cabinets to a two-channel I-Tech HD amplifier using two standard NL4 (or NL2) cables.
VTX B15
I-TECH 12000HD
Amplifier Rear Panel
CH-1
CH-2
VTX B15
Channel Selection
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Summary of Contents for JBL Professional VTX Series
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