Xcb Bass System
Xcb Bass System
2
sure levels. This means that the front-of-
house engineer will not have to retune the
EQ and level settings as the SPL is in-
creased throughout the show. This also
means that the sound-system performance
will remain consistent in different array con-
figurations and from venue to venue.
The X-Array™ systems utilizes a unique rig-
ging system. A hinge assembly is used to link
cabinets together at their rear corners, while
wire-rope/fitting assemblies are used at the
front to adjust the relative angle between sys-
tems. (See the Flying the X-Array™ Systems
section for more details.)
The Xcb utilizes the half-size X-Array™ en-
closure shell, which is identical to that of
the Xcn mid-bass/high-frequency system.
They have the same footprint and rigging as
the full-size X-Array™ systems; however,
the height of the compact systems is approxi-
mately half that of the full-size systems.
The durable Xcb enclosure is constructed of
18-mm, 13-ply birch plywood and has a
wear-resistant black, textured paint finish.
The system is trapezoidal, forming an 18°
wedge and includes a heavy-duty steel grille
with a water-resistant charcoal-gray foam in-
terlining. The enclosure features vinyl
bumper pads on the front corners to and feet
on the bottom to resist wear.
A variety of accessories are available for the
X-Array™ loudspeaker systems, including
rigging hardware, dollies, covers, electronic
crossovers, amplifier racks and speaker ca-
bling. Consult the X-Array™ Accessories
section for a complete listing of the avail-
able accessories
Applications
The X-Array™ loudspeaker systems were
designed for optimal performance in both
concert-sound and permanent-installation
applications where studio-monitor sound
quality is required at concert-sound levels.
The X-Array™ loudspeaker systems work
well individually, in small arrays and in large
arrays. The high acoustic output from these
compact, lightweight systems provide the
highest acoustic-power-to-weight ratio, the
highest acoustic-power-to-frontal-area ratio,
and the highest acoustic-power-to-bulk-vol-
ume ratio in the industry. That means that
X-Array™ systems will be considerably
smaller and lighter compared to competitive
systems having equivalent acoustic out-
put.
With its response from 37-160 Hz, the Xcb
is recommended for low-frequency appli-
cations where very-high levels of bass are
required from a compact enclosure. Spe-
cifically, the Xcb has been optimized to pro-
vide low-frequency reinforcement for the
LF/MB/HF and MB/HF X-Array™ sys-
tems (like the Xf, Xn or Xcn). The Xcb may
be used individually or in multiples to con-
struct low-frequency arrays, or may be
used with the mid-bass-/high-frequency or
low-/mid-bass-/high-frequency X-Array™
loudspeaker systems to construct large
full-range arrays. The Xcb enclosure is
identical to that of the other half-size X-
Array™ systems (like the Xcn). The foot-
print of the half-size X-Array™ enclosures
is identical to that of the full-size X-Ar-
ray™ systems (like the Xn, Xf and Xb), as
is the rigging hardware, making array inte-
gration easy whether flying or stacking.
The Xcb would be well suited for front-of-
house, front-fill, side-fill applications and
down-fill applications. The Xcb is intended
to be used with other X-Array™ systems for
a full-range response as an active system that
requires an active electronic crossover. Both
the Electro-Voice Dx38 and Klark Teknik
DN8000 digital crossovers are recom-
mended for signal control. (See the Cross-
over, Equalization and Signal Delay Con-
troller section.) The Electro-Voice P3000
amplifier is recommended for powering the
Xcb. (See the Amplifier Recommendations
section.)
Power-Handling Capabilities
The Xcb systems are rated as per the
“ANSI/EIA RS-426-A Loudspeaker Power-
Rating, Full-Range Test,” which uses a
shaped-random-noise signal to simulate
typical music to test the mechanical and
thermal capabilities of the loudspeakers.
A digital crossover was used to provide
the appropriate filtering and equalization.
The test parameters are as follows:
Low-Frequency Section
P
E(MAX)
:
600 watts
Test Voltage:
58.7-volts rms
117.4-volts peak
R
SR
(1.15R
E
):
5.75 ohms
Amplifier Recommendations
Power amplifiers with the following ratings
are recommended for use with the Xcb loud-
speaker systems:
LF:
800 watts per channel
into 8 ohms
93-volts rms short term
132-volts peak
Xcb loudspeakers may be paralleled with
other Xcb systems as long as the amplifiers
can drive the lower impedances. To main-
tain a sufficient damping factor with long
cable runs, amplifier loads of four ohms per
channel are recommended. The Electro-
Voice P3000 amplifiers are ideal for power-
ing the X-Array™ systems.
Crossover, Equalization and Signal
Delay Controller
The Xcb is intended to be used with other
X-Array™ loudspeaker systems (like the Xf,
Xn, Xb or Xds for example) to construct full-
range arrays as an active system requiring
an active crossover, equalization and signal
delay controller. For basic applications, the
Electro-Voice Dx38 2-in/4-out controller is
recommended. For more sophisticated ap-
plications, the Klark Teknik DN8000 2-in/
5-out controller is recommended. Linkwitz-
Riley crossover filters with a minimum slope
of 24 dB per octave at 125 Hz are recom-
mended, and infrasonic filter protection at
42 Hz or higher with a minimum slope of
12-dB/octave is recommended in the low-
frequency section. Both the Dx38 and the
DN8000 offer appropriate filtering, equal-
ization and signal delay capabilities to pro-
vide optimum performance of the X-Ar-
ray™ loudspeaker systems. Digital param-
eter settings for both controllers are avail-
able upon request.
Electrical Connection and System
Wiring
Two semi-paralleled Neutrik 8-pin Speakon
®
connectors are used for electrical connection
to the Xcb loudspeakers with the following
pin assignments:
LF1:
Pins 1 in/ Pins 2 out
The Xcb wiring diagram is shown in Fig-
ure 7. Note that one connector is specifi-
cally labeled for input connection only and
