User manual

B2-SUB Data Sheet B2-SUB
B2-CO
B2-CO controls
B2-SUB
The B2-SUB is an actively driven subwoofer which uses a pair of
18" LF drivers mounted in a bandpass horn cabinet.
The cabinet is constructed from marine plywood coated with an
impact resistant paint. Fitted each side of the cabinet sides are four
recessed handles and, on the rear panel, four heavy duty wheels.
On the front is a rigid steel grill with a replaceable acoustically
transparent foam cover. Catches to secure an optional protective
transport cover are also fitted to the top and bottom front edges
of the cabinet.
The width and height of the B2-SUB front panel is identical to that
of two side-by-side C4 cabinets making it particularly easy to stack
an array of B2-SUBs and C4 cabinets. The B2-SUB can be
operated standing vertically or placed on its side horizontally.
The frequency response of the B2-SUB extends from 37 Hz to 125
Hz (5 dB) with a peak sound pressure level of 139 dB-SPL. The B2
system is therefore ideal for use with the F2 system to provide high
SPL coverage in large venues.
B2-CO - Controls & indicators
INFRA switch and indicator
A single configuration switch (INFRA) is located on the top left of
the module front panel. A yellow LED next to the switch illuminates
when it is selected. Selecting the INFRA switch restricts the B2 fre-
quency response to a narrow, 32 Hz to 68 Hz range (5 dB). This
transforms a B2 system into an infrabass system for use with the C4
system. B2-SUBs can also be used as an infrabass system when
C4-SUBs are used along with C6 or F2 cabinets.
Controller module rear panel
A single 8-pin CA-COM output socket is fitted to the module rear
panel. An additional balanced XLR output marked C4-OUT is also
provided on the module rear panel. The C4-OUT signal can be
used to drive C4-SUB controller inputs when a B2 system is used as
an infrabass system for C4-SUBs. In the event of a power or mai-
nframe failure, a bypass relay in the B2-CO controller module will
connect the pins of the C4-OUT socket directly to those of the
module INPUT socket allowing the continued operation of the
C4-SUB and TOP systems.