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VTX A8 | User Manual
8 - SYSTEM AMPLIFICATION & WIRING
Like all other VTX systems, the VTX A8 and B18 cabinets are powered exclusively by Crown I-Tech HD amplifiers, providing optimum
performance and consistency across the world. The Crown I-Tech HD Series amplifiers feature BSS Audio OMNIDRIVEHD™ processing
for each amplifier channel, including the acclaimed LevelMAX™ Limiter Suite and support for linear-phase FIR filters. All VTX A8 and B18
processing is performed using the I-Tech HD’s internal processing, so no other external DSP is required. The Crown amplifiers include a
user-adjustable input section for room correction equalization, array size compensation and circuit adjustments.
Standard JBL presets are available for both the Crown I-Tech 4x3500HD and Crown I-Tech 12000HD. The most up-to-date presets are
available for download from the www.jblpro.com website and are always bundled in the latest version of JBL’s Performance Manager
TM
control software.
8.1 - A8 ON CROWN I-TECH 4X3500HD AND NL4 CABLES
When using Crown Audio I-Tech 4x3500HD amplifiers, up to 6 VTX A8 (3 x per circuit) loudspeakers can be powered per amplifier. Based
on the A8 component resource requirements, this allows for optimum power-to-transducer ratio without compromising the maximum
SPL capabilities of the system. Circuits of 2 cabinets can be used when higher circuiting resolution is necessary. The example below
illustrates how to connect 6 x VTX A8 cabinets to an I-Tech 4x3500HD amplifier using standard 4-contactor NL4 cables.
Amplifier Channels
Channel 1 A8 LF
Channel 2 A8 MF/HF
Channel 3 A8 LF
Channel 4 A8 MF/HF
Crown I-Tech 4x3500HD 6 x VTX A8
NL4 Cables
CH1/CH2 CH3/CH4
OUTPUTS
Amplifier Rear Panel
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