B18 On Crown I-Tech 12000Hd - JBL VTX Series User Manual

8.2 - B18 ON CROWN I-TECH 12000HD

When using Crown Audio I-Tech 12000HD amplifiers, up to 4 x VTX B18 (2 x per circuit) subwoofers can be powered per amplifier. Based
on the B18 component resource requirements, this allows for optimum power-to-transducer ratio without compromising the maximum
SPL capabilities of the system. The example below illustrates how to connect 4 x VTX B18 cabinets to a 2-channel I-Tech HD amplifier
using standard 4-contactor NL4 cables. One NL4 cable is used to connect the amplifier to the first B18 cabinet and then standard 4-con-
tactor NL4 jumpers are used to connect all the cabinets together. The channel selection switch at the back of each B18 is used to assign
each cabinet to the appropriate amplifier channel. Two B18s are set to A (channel 1, Pin1) and two B18s are set to B (channel 2, Pin 2).
Amplifier Channels
Channel 1 B18 1&2
Channel 2 B18 3&4
Amplifier Rear Panel
Crown I-TECH HD
CAUTION: In this configuration, only the Channel-1 NL4 connector can be used on the I-Tech 12000HD amplifier. The
Channel-1 NL4 connector is wired to both Channel-1 and Channel-2 were Channel-2 includes only Channel-2.
TIP: Other channel assignments can be implemented when using the 2-channel Crown Audio I-Tech HD amplifiers. Use
JBL's HiQNet
®
NL4 Cable
Performance Manager control software to assign speaker presets.
TM
VTX A8 | User Manual
JBL VTX B18
22
Channel Selection
Switch
A
B
A
B
A B
A B