Mode Selection Switch - JBL VTX M Series User Manual

Mode Selection Switch

The VTX M20 and M22 feature a set of easily accessible selection switches.
Dual-Channel (Bi-Amp) Mode
The first switch is a Mode Selection switch that allows for selecting between Single-Channel (Passive) and Dual-Channel (Bi-Amp)
operating modes. In Single-Channel (Passive) mode an internal crossover network is engaged that allows powering M Series monitors
with a single amplifier/DSP channel reducing the amplifier channel requirements. In Dual-Channel (Bi-Amp) mode, two amplifier/DSP
channels are used, one for the low frequency section and one for the high frequency section. Depending on the available amplifier
channels, budget, or artists requirements a user can easily switch from one mode to the other.
The second switch is a Channel Selection switch that it is only active when the Mode Selection switch is set to Single-Channel (Passive)
mode. The channel selection switch allows for selecting which set of the NL4 Pins (Pin 1± or Pin 2±) are used for powering the monitor.
Using this switch and Crown Audio I-Tech HD amplifiers, a user can select which amplifier channel is driving a set of monitors. When
using 2-channel I-Tech HD amplifiers and CH-1 NL4 output on the amplifier, when the switch is set to Input A the a monitor is driven by
Channel 1 and when the switch is set to Input B a monitor is driven by Channel 2. This configuration allows for one NL4 cable run from
the amplifier to drive up to 4x VTX M Series monitors in two independent monitor mixes. When using the 4-Channel I-Tech 4x3500HD
amplifier and the NL4 outputs, the switches can be used to select between Channels 1 or 2 for the first NL4 and Channels 3 or 4 for the
second NL4 output. This allows for powering up to 8x VTX M Series monitors with one amplifier.
A cover for the switch access panel is included and can be used to visually cover the switch panel for customers that choose not to
frequently use this feature, or for fixed installations.
Single-Channel (Passive) Mode
Input A (Channel 1)
Single-Channel (Passive) Mode
Input B (Channel 2)
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