Electro-Voice XCB EDS User Manual

Xcb

X-Array™ Bass System

• Single-woofer design equivalent
to half of an Xb

• Ring Mode Decoupling (RMD)™
provides accurate transient detail

• EVX-180B woofer

• Unique rear-hinge rigging

• Enclosure shell and rigging
identical to all of the half-size
X-Array™ systems

Description

The X-Array™ product line represents im­portant advancements in concert-sound-rein­forcement technology. The design goals
called for the highest acoustic output capa­bility with the highest fidelity in lightweight,
compact enclosures that were easy to array.
The development began with a clean sheet
of paper and took an integrated approach.
The individual loudspeaker drivers, horns,
enclosures, rigging hardware and system
configurations were designed from the
ground up specifically for this high-perfor­mance application.

The Xcb is a manifolded, vented-box bass
system utilizing one 457-mm (18-in.) woofer
in the half-size X-Array™ enclosure shell.
The one woofer faces into a slotted cham­ber at the bottom of the enclosure. This tech­nique increases the acoustic loading, result­ing in increased low-frequency efficiency (at
slightly above box tuning) and reduced dis­tortion compared to conventional direct-ra­diating designs. The woofers were designed
as part of the Xcb development and repre­sent a step forward in state-of-the-art loud­speaker design in terms of high acoustic out­put with low distortion and low power com­pression. Electro-V oice engineers developed
a new technology dubbed Ring Mode
Decoupling (RMD™) to substantially im­prove clarity and intelligibility by reducing

both linear and nonlinear resonance modes
that color the sound.

The low-frequency driver in the Xcb is the
EVX-180B. An improved version of the in­dustry-standard EVX-180A high-excursion
467-mm (18-in.) woofer that has distin­guished itself as an industry standard for
high-power, low-frequency reproduction.
During the X-Array™ development, the ther­mal conduction of the motor was improved
and the suspension was redesigned, giving
the EVX-180B even lower power compres­sion and a longer mechanical lifetime. In the
Xcb, the woofer is slot-loaded in a vented
enclosure optimized for maximized output
from 37-160 Hz with minimized distortion.

Ring Mode Decoupling, (RMD™), is a tech­nique utilized and named by Electro-Voice
to describe a process used to improve sound
quality in loudspeaker systems.

Ring Mode Decoupling (RMD™) offers a
solution to a very fundamental problem. It
has long been recognized that two different
loudspeaker systems can sound different
even though they both may be equalized to
have the same frequency response. This dif­ference is due to a variety of resonances, or
ring modes that color the sound. Although
this ringing may be very low in level com­pared to the program material, it is still au­dible. The source of these resonances may
be mechanical or acoustical in nature, or a

combination of both. In addition, they may
be linear or nonlinear, resulting in their char­acter changing with level. Furthermore, these
Ring Modes may be aggravated when mul­tiple loudspeaker enclosures are assembled
into arrays. The result is a coloration that de­creases intelligibility and clarity, with the
nature of that coloration varying with level.
Often, the listener perceives that coloration
as imbalance in the frequency response, and
will attempt to electronically adjust the sys­tem to restore the spectral balance. However
this electronic equalization has the negative
effect of changing the program material
itself.

Ring Mode Decoupling (RMD™) ad­dresses mechanical resonances with me­chanical solutions, and acoustical reso­nances with acoustical solutions. In the
Xcb development, RMD™ was applied at
every level – to the individual low-fre­quency drivers, the low-frequency enclo­sure chambers and the interaction between
multiple enclosures. The design process
included, for example, the driver cone, sus­pension geometry and materials, enclosure
geometry and materials, absorptive mate­rials, etc. The result is a dramatic improve­ment in clarity and with a much more neu­tral sound (a lack of coloration) with the
loudspeaker system maintaining its sonic
integrity from the very-lowest sound pres­sure levels to the very-highest sound pres-

Xcb Bass System

sure levels. This means that the front-of­house engineer will not have to retune the
EQ and level settings as the SPL is in­creased throughout the show. This also
means that the sound-system performance
will remain consistent in different array con­figurations and from venue to venue.

The X-Array™ systems utilizes a unique rig­ging system. A hinge assembly is used to link
cabinets together at their rear corners, while
wire-rope/fitting assemblies are used at the

Xcb Bass System

front to adjust the relative angle between sys­tems. (See the Flying the X-Array™ Systems
section for more details.)

The Xcb utilizes the half-size X-Array™ en­closure 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 approxi­mately 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 in­terlining. 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 ca­bling. Consult the X-Array™ Accessories
section for a complete listing of the avail­able 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 lar ge
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-vol­ume ratio in the industry. That means that
X-Array™ systems will be considerably
smaller and lighter compared to competitive

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systems having equivalent acoustic out­put.

With its response from 37-160 Hz, the Xcb
is recommended for low-frequency appli­cations where very-high levels of bass are
required from a compact enclosure. Spe­cifically, the Xcb has been optimized to pro­vide low-frequency reinforcement for the
LF/MB/HF and MB/HF X-Array™ sys­tems (like the Xf, Xn or Xcn). The Xcb may
be used individually or in multiples to con­struct 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 X­Array™ systems (like the Xcn). The foot­print of the half-size X-Array™ enclosures
is identical to that of the full-size X-Ar­ray™ systems (like the Xn, Xf and Xb), as
is the rigging hardware, making array inte­gration easy whether flying or stacking.

The Xcb would be well suited for front-of­house, 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 recom­mended for signal control. (See the Cross-

over, Equalization and Signal Delay Con­troller 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 Power­Rating, 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

: 600 watts

E(MAX)

Test Voltage: 58.7-volts rms

117.4-volts peak

R

(1.15RE): 5.75 ohms

SR

Amplifier Recommendations

Power amplifiers with the following ratings
are recommended for use with the Xcb loud­speaker 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 main­tain a sufficient damping factor with long
cable runs, amplifier loads of four ohms per
channel are recommended. The Electro­Voice P3000 amplifiers are ideal for power­ing 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 full­range 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 ap­plications, the Klark Teknik DN8000 2-in/
5-out controller is recommended. Linkwitz­Riley crossover filters with a minimum slope
of 24 dB per octave at 125 Hz are recom­mended, and infrasonic filter protection at
42 Hz or higher with a minimum slope of
12-dB/octave is recommended in the low­frequency section. Both the Dx38 and the
DN8000 offer appropriate filtering, equal­ization and signal delay capabilities to pro­vide optimum performance of the X-Ar­ray™ loudspeaker systems. Digital param­eter settings for both controllers are avail­able upon request.

Electrical Connection and System
Wiring

T wo 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 Fig­ure 7. Note that one connector is specifi­cally labeled for input connection only and

®

Xcb Bass System

the other for output connection only. Also
note that Pins 1 In are connected to Pins 2
Out, and Pins 2 In are connected to Pins 1
Out. This facilitates the wiring of multiple
systems with amplifiers. When four Xcb
systems are jumped from one to another
via the input/output connections, the am­plifier home-run cable will have two woof­ers on Pins 1 (for a 4-ohm load) and two
woofers on Pins 2 (for a 4-ohm load). Al­though Pins 3 and 4 are not used by the
Xcb systems, they are paralleled on the
input panel. This allows an X-Array™ MB/
HF box (like the Xcn or Xf – which use
Pins 1 and 2, but not Pins 3 and 4) to be
paralleled with an Xcb, allowing all eight
conductors to be used with a single cable
run to the amplifiers.

Flying the X-Array™ Systems

The X-Array™ loudspeaker systems all
utilize the same rigging hardware and have
the same structural strength ratings. Thus,
different systems may be mixed in an array
to achieve the best acoustic results. The
rigging system allows for the smallest pos­sible spacing between adjacent enclosures,
and utilizes quick-release rigging fittings
for fast installation and tear down.

When flown, the X-Array™ enclosures are
linked together by two removable hinges on
the rear of the enclosures at the top and bot­tom. This arrangement enables the enclo­sures to pivot vertically from the rear cor­ners. The relative vertical angle between
adjacent enclosures is adjustable and set by
two removable rigging straps on the front of
the enclosures at the top and bottom. Both
the rear rigging hinges and the front rigging
straps are installed when enclosures are sit­ting on top of one another. For ease of in­stallation of the hinges and straps, the en­closures self align using feet and cups
mounted on the top and bottom of the en­closures. The relative horizontal angle be­tween adjacent columns of loudspeakers is
set by adjustable grids at the top of the array
(or by custom-building attachment supports
in permanent-installation applications where
grids are not used).

The removable proprietary rear rigging
hinges utilize all-steel construction, and are
secured into a proprietary track assembly on
the enclosure (similar to the heavy-duty air­craft L-track). The aluminum track is ex-

3

truded as a single-piece track/angle-bracket
assembly and ties into the top, bottom and
rear of the enclosure. Metal bars inside the
enclosure tie the top and bottom track/angle­bracket assemblies together, minimizing the
load applied to the wooden enclosure. The
rear extrusion will accommodate the New
Haven 32102-2 aircraft-type double-stud
locking fitting instead of the hinge for ap­plications requiring a lower strength rating.

The removable, front strap assemblies uti­lize all-steel New Haven 32102-2 aircraft­type double-stud locking fittings and wire­rope and are secured into another proprietary
track similar to the heavy-duty aircraft L­track. The track is extruded as a single-piece
track/angle-bracket assembly that ties into
the front and side of the enclosure. The track/
angle-bracket assembly extends from the top
to the bottom of the enclosure, eliminating
the load applied to the wooden enclosure.

A complete line of flying-hardware acces­sories is available for the X-Array™ loud­speaker systems including a grid, rigging
hinges and rigging straps. The variety of rig­ging hinges and front rigging straps avail­able include those for linking two enclosures
together, securing the top enclosure in a col­umn to a grid and for picking up the top en­closure in a column without a grid. Consult
the X-Array™ Accessories section for a com-
plete listing of the available rigging acces­sories.

The total weight of a column of X-Array™
loudspeaker systems that may be supported
by the X-Array™ rigging system varies from
454-726 kg (1,000-1,600 lb) depending on
the rigging configuration details. An X­Array™ Flying Manual is available from
Electro-Voice and is included with each
X-Array™ system shipment. The manual
should be consulted for complete structural
specifications and detailed instructions for
safely suspending and using the X-Array™
systems.

Field Replacement

Normal service for the Xcb requires only a
#2 Phillips screwdriver and a 3/16-inch hex­key wrench. The drivers may be accessed
as follows:

LF: First remove the grille, then remove
the screws securing the hatch on the front
of the enclosure. Remove the screws se-

curing the 18-inch woofer and lift the
woofer out of the enclosure. In the event
of failure, the entire woofer must be re­placed or reconed.

The following service parts are available
from the service department in Buchanan,
Michigan USA:

LF #818-2883 EVX-180B complete driver
The complete drivers are available only for

repair replacement and are not available for
general sale.

Architects’ and Engineers’
Specifications

The loudspeaker system shall be a two­driver, slot-loaded, vented-box low-fre­quency system with a frequency response
from 37-200 Hz. The loudspeaker system
also shall have one 457-mm (18-in.) low­frequency woofers and each shall have an
8-ohm, 101-mm (4-in.) diameter voice
coil and a 600-watt power rating. The loud­speaker shall have a rigging system enabling
a column of loudspeakers to be hinged at
their back corners, with relative downward
angles set by adjustable rigging straps at the
front.

The enclosure shall be constructed of 18-mm
thick, 13-ply birch plywood, and shall be
trapezoidal, forming an 18° wedge and be
596 mm (23.46 in.) high, 584 mm (23.00 in.)
wide at the front, 354 mm (13.93 in.) wide
at the back and 759 mm (29.88 in.) deep,
and shall weigh 55.8 kg (123 lb).

The loudspeaker system shall be the
Electro-Voice Xcb.

Rigging Accessories:
Grid: This ATM Fly-Ware™ “T”–shaped,

all-steel-construction grid was specifically
designed as a single column of X-Array™
systems. Multiple grids can be linked to­gether with couplers on front and back re­tractable arms, the position of which sets the
splay angle between adjacent columns. Part
number MEGS-4000-T. ATM Fly-ware™,
2100 S. Wilmington A ve., Carson, CA 90810
USA, 310/834-5914

Xrhg Grid Hinge: Two Xrhg grid rigging
hinges are used to attach the rear of the
top enclosure in a column to the rear of an
X-Array™ compatible grid. Each hinge
consists of two precision-machined steel
rigging-track fittings connected by an al-

Xcb Bass System

Xcb Bass System

Xcb Bass System

loy-steel chain. Part number 510-2999.
Electro-Voice, 600 Cecil St., Buchanan, MI
49107 USA, 616/695-6831 or 800/234-6831

Xrhp Pickup Hinge: Two Xrhp pickup
rigging hinges are used to create custom
rigging assemblies to attach to the rear of
the top enclosure in a column when an
ATM grid is not used. Each hinge con­sists of one precision-machined steel rig­ging-track fitting with an alloy-steel chain.

Xcb Bass System

Part number 510-3000. Electro-Voice, 600
Cecil St., Buchanan, MI 49107 USA,
616/695-6831 or 800/234-6831

Xrhl Linking Hinge: Two Xrhl linking
rigging hinges are used to link two enclo­sures together at the rear. Each hinge con­sists of two precision-machined steel rig­ging-track fittings connected by a heavy­duty steel hinge. Part number 510-2998.
Electro-Voice, 600 Cecil St., Buchanan, MI
49107 USA, 616/695-6831 or 800/234-6831

Xrsl Long Rigging Steel Straps: Two Xrsl
long rigging straps are used at the front of
two enclosures to adjust their relative verti­cal angles. The Xrsl may also be used to at­tach the front of the top enclosure to the A TM
grid when upward angles are not required.
Each all-steel strap consists of two New
Haven NH32102-2 double-stud fittings con­nected by black plastic-coated wire rope.
Sound Manufacturing Inc., 3336 Primera
A ve., Hollywood, CA 90068 USA, 213/850­5042 or ATM Fly-ware™, 2100 S.
Wilmington Ave., Carson, CA 90810 USA,
310/834-5914

Xrss Short Rigging Steel Straps: Two
Xrss short rigging straps are used to at­tach the front of the top enclosure to the
ATM grid. The Xrss may also be used at
the front of two enclosures when a limited
range of vertical angles are required. The
all-steel Xrss utilizes the same construc­tion as the Xrsl. Sound Manufacturing Inc.,
3336 Primera Ave., Hollywood, CA 90068
USA, 213/850-5042 or ATM Fly-ware™,
2100 S. Wilmington A ve., Carson, CA 90810
USA, 310/834-5914

General Rigging Supplies: A wide vari­ety of standard and specialty rigging hard­ware components for both touring and per­manent-installation applications is avail­able. Sound Manufacturing Inc., 3336
Primera A ve., Hollywood, CA 90068 USA,
213/850-5042 or ATM Fly-ware™, 2100 S.

4

Wilmington Ave., Carson, CA 90810 USA,
310/834-5914

Electronic Accessories:
Klark Teknik DN8000 Digital Control-

ler: The DN8000 digital electronic loud-

speaker controller has a two-in/five-out ar­chitecture, with each output having pro­grammable high-pass and low-pass filters,
four-band equalization, signal delay, com­pressor-limiter-and noise-gate functions.
Program parameters for optimal perfor­mance of the X-Array™ systems are avail­able. Klark Teknik, Klark Industrial Park,
Walter Nash Road, Kidderminster,
W orcestershire DY11 7HJ England, 44-156­274-1515

Electro-Voice Dx38 Digital Controller:

The Dx38 digital electronic loudspeaker
controller has a two-in/four-out architecture,
with each output having programmable high­pass and low-pass filters, four-band equal­ization, signal delay, compressor and lim­iter functions. Program parameters for op­timal performance of the X-Array™ sys­tems are available. EVI Audio, 600 Cecil
St., Buchanan, MI 49107 USA, 616/695-6831

Electro-Voice P3000 Power Amplifiers:

The stereo P3000 power amplifiers are rated
at 800 watts into 8 ohms, or 93-volts rms
short term. The amplifiers are 3-U high and
weigh 28 kg (62 lb) each. EVI Audio, 600
Cecil St., Buchanan, MI 49107 USA,
616/695-6831
X-Array™ Amplifier Racks: These 16-U
racks will hold four Electro-Voice P3000
power amplifiers, one Klark Teknik DN8000
digital controller, 1-U light module, and a 2­U multipin patch panel. The aluminum­frame/wood-panel racks are vibration-isola­tion mounted on heavy-duty wheel boards
and come prewired for AC power, audio and

®

control signal sends and Neutrik

Speakon
speaker connectors. db Sound, L.P., 1219
Rand Road, Des Plaines, IL 60016 USA,
847/299-0357
X-Array™ Speaker Cables: Eight conduc­tor cable with four #11 A WG conductors and
four #13 AWG connectors. The larger con­ductors are used in the LF bands for in­creased damping factor. Lengths made to
order. Standard terminations are Neutrik
Speakon™ NL8FC connectors wired to
X-Array™ standards; however, custom
terminations are available. Entertainment

Technology Cable, 1247 Rand Road,
Des Plaines, IL 60016 USA, 800/529-6312

Miscellaneous Accessories:
X-Array™ Loudspeaker Covers: Heavy-

duty covers are available for the X-Array™
speakers. These covers wrap around the
enclosures, while sitting on a dolly, and
Velcro together at the back for fast instal­lation and removal. db Sound, L.P., 1219
Rand Road, Des Plaines, IL 60016 USA,
847/299-0357
X-Array™ Dolly Boards: Double-wide
dolly built to hold four X-Array™ loud­speakers, two wide by two high. The double­thick 18-mm birch-plywood construction
includes cutouts and keys for loudspeaker
enclosure shape and alignment feet. The
dolly boards are painted black and utilize
four extra-heavy-duty 4-inch x 2-inch cast­ers. Custom-designed dolly boards are also
available to meet specific requirements.
R&R Cases and Cabinets, 1217 Rand Road,
Des Plaines, IL 60016 USA, 847/299-8100
Racks and Road Cases: A variety of gen­eral purpose, custom racks and hard-shell
road cases are available for touring or per­manent-installation applications. R&R Cases
and Cabinets, 1217 Rand Road, Des Plaines,
IL 60016 USA, 847/299-8100

Uniform Limited Warranty

Electro-Voice products are guaranteed
against malfunction due to defects in mate­rials or workmanship for a specified period,
as noted in the individual product-line
statement(s) below, or in the individual prod­uct data sheet or owner’s manual, beginning
with the date of original purchase. If such
malfunction occurs during the specified pe­riod, the product will be repaired or replaced
(at our option) without charge. The product
will be returned to the customer prepaid.
Exclusions and Limitations: The Limited
W arranty does not apply to: (a) exterior fin­ish or appearance; (b) certain specific items
described in the individual product-line
statement(s) below, or in the individual prod­uct data sheet or owner’s manual; (c) mal­function resulting from use or operation of
the product other than as specified in the
product data sheet or owner’s manual; (d)
malfunction resulting from misuse or abuse
of the product; or (e) malfunction occur­ring at any time after repairs have been

Xcb Bass System

Xcb Bass System

made to the product by anyone other than
Electro-Voice Service or any of its autho­rized service representatives. Obtaining
Warranty Service: To obtain warranty ser­vice, a customer must deliver the product,
prepaid, to Electro-Voice Service or any of
its authorized service representatives to­gether with proof of purchase of the prod­uct in the form of a bill of sale or receipted
invoice. A list of authorized service repre­sentatives is available from Electro-V oice Ser­vice at 600 Cecil Street, Buchanan, MI 49107
(800-234-6831 or F AX 616-695-4743). Inci­dental and Consequential Damages Ex­cluded: Product repair or replacement and
return to the customer are the only remedies
provided to the customer. Electro-Voice shall
not be liable for any incidental or conse­quential damages including, without limita­tion, injury to persons or property or loss of

Figure 1 — Polar Response

The directional response of the Xcb was measured in an anechoic environment at a distance of 6.1 m (20 ft.) using 1/3-octave-filtered pink
noise with a full spherical measurement system. The polar response of the loudspeaker system at selected 1/3-octave frequencies is
shown. The selected frequencies are representative of the polar response of the system.

use. Some states do not allow the exclusion
or limitation of incidental or consequential
damages so the above limitation or exclu­sion may not apply to you. Other Rights:
This warranty gives you specific legal rights,
and you may also have other rights which
vary from state to state.

Electro-Voice Speakers and Speaker Sys­tems are guaranteed against malfunction due

to defects in materials or workmanship for a
period of five (5) years from the date of origi­nal purchase. The Limited W arranty does not
apply to burned voice coils or malfunctions
such as cone and/or coil damage resulting from
improperly designed enclosures. Electro-V oice
active electronics associated with the speaker
systems are guaranteed for three (3) years from
the date of original purchase. Additional de­tails are included in the Uniform Limited
W arranty statement.

Electro-Voice Accessories are guaranteed
against malfunction due to defects in mate­rials or workmanship for a period of one (1)
year from the date of original purchase. Addi­tional details are included in the Uniform Lim­ited W arranty statement.
Electro-V oice Flying Hardware (including
enclosure-mounted hardware and rigging
accessories) is guaranteed against malfunc­tion due to defects in materials or workman­ship for a period of one (1) year from the
date of original purchase. Additional details
are included in the Uniform Limited War­ranty statement.
For warranty repair, service information, or a
listing of the repair facilities nearest you, con­tact the service repair department at: 616/695­6831 or 800/685-2606.
For technical assistance, call: 800/234-6831.
Specifications subject to change without notice.

V ertical

Horizontal

5 dB per division

Xcb Bass System

63 Hz 100 Hz

80 Hz

125 Hz 160 Hz 200 Hz

5

Figure 2 — Frequency Response

The frequency response of the Xcb was mea­sured on axis in the far field in an anechoic
environment using a swept sine-wave sig­nal. The Klark Teknik DN8000 digital elec­tronic unit was used to provide the neces­sary crossover filters, equalization and time
delay. One watt of power (2.83-volts rms at
70 Hz) was applied to the mid band of the
low-frequency section. The sound pressure

Xcb Bass System

level was normalized for an equivalent one­meter distance.

Xcb Bass System

Figure 3 — Beamwidth

The beamwidth of the Xcb, (i.e., the included
horizontal and vertical coverage angles at the

-6-dB points) was measured with a full­spherical measurement system as described
in Figure 1.

Figure 4 — Directivity

The directivity index, D
tor, R

, of the Xcb were measured with a full-

, and directivity fac-

i

spherical measurement system as described
in Figure 1.

6

Figure 5 — Distortion

Distortion for the Xcb was measured on axis
in the far field in an anechoic environment
with an input signal that would result in a
sound pressure level of 115 dB at one meter .
The Klark Teknik DN8000 digital electronic
unit was used to provide the necessary cross­over filters, equalization and time delay. The
sound pressure level was normalized for an
equivalent one-meter distance. Plots of sec­ond and third harmonic distortion are shown
referenced to the fundamental.

Figure 6 — Impedance

The impedance of each frequency band
of the Xcb was measured in an anechoic
environment

Xcb Bass System

Xcb Bass System

Figure 7 — Wiring Diagram

The wiring diagram of each frequency band
of the Xcb is shown.

7

WHITE

4+

BLACK

4 -

BLUE

3+

BLACK

3 -

RED

2+

BLACK

2 -

RED

1+

OUTPUT ONLY

BLACK

1 -

WHITE

4+

BLACK

4 -

BLUE

3+

BLACK

3 -

RED

2+

BLACK

2 -

RED

INPU T O NLY

1+

BLACK

1 -

BLACK

RED

LF:

PINS 1 IN / PINS 2 OUT

PINS 2 IN CONNECTED TO PINS 1 OUT

PINS 3 & 4 PARALLELED

RED SPEAKER TERMINAL IS "+"

BLACK SPEAKER TERMINAL IS "-"

_

LF

+

8 OHMS NOMINAL

5.0 OHMS DC

Figure 8—Dimensions

Xcb Bass System

Xcb Bass System

353.8 mm
(13.93 in.)

9.0°
TYP

733.2 mm
(28.87 in.)

584.2 mm
(23.00 in.)

595.9 mm
(23.46 in.)

758.8 mm
(29.88 in.)

WEIGHT: 55.8 kg (123 lb)

Specifications

Frequency Response (measured in far
field, with and without crossover and
equalization, calculated to one meter
on axis, swept sine wave, one watt into
system - 2.83 V at 70 Hz, anechoic
environment; see Figure 2):

37-200 Hz

Crossover Frequency:

125 Hz

Efficiency Mid Band:

2.7 %

Maximum Long-T erm-A verage
Power-Handling Capacity (per ANSI/
EIA RS-426A 1980):

600 watts

Maximum Long-T erm-Average Mid­Band Acoustic Output, LF/HF:

16.2 acoustic watts

Sensitivity (SPL at one meter, indi­cated input power, anechoic environ­ment, average level),

1 watt:

95.0 dB

600 watts:

122.8 dB

Beamwidth (angle included by 6-dB­down points on polar responses,
indicated one-third-octave bands of
pink noise; see Figures 1 and 3),

Horizontal, 63-200 Hz:

300° (+60°, -80°)

Vertical, 63-200 Hz:

270° (+90°, -80°)

Directivity Factor, R (Q), 63-200 Hz
Average (see Figure 4):

1.9 (+0.5, -0.3)
Directivity Index, Di, 63-200 Hz

Average (see Figure 4):

2.7 dB (+1.0 dB, -0.6 dB)

Distortion (115 dB SPL at one meter,
shaped spectrum; see Figure 5),

Second Harmonic,

40 Hz:

1.8%

80 Hz:

1.3 %

Third Harmonic,

40 Hz:

0.6 %

80 Hz:

0.8 %

T ransducer Complement,

One EVX-180B 18-in. woofer

Impedance (see Figure 6),

Nominal:

8 ohms

Minimum:

5.6 ohms

Input Connections:

T wo Neutrik NL8MPR Speakon

®

connectors semi-paralleled

Recommended Amplifier Power ,

Rating:

800 watts per channel @ 8 ohms
(93-volts rms short term)

Enclosure Construction,

Enclosure Shell:

18-mm, 13-ply birch plywood

Finish:

Black textured paint

Grille:

Powder-coated steel with foam

Rigging:

Proprietary hinge system at rear.
Heavy-duty L-track on front which
accepts New Haven NH32102-2
double-stud fittings

Dimensions,

Height:

595.9 mm (23.46 in.)

Width (front):

584.2 mm (23.00 in.)

Width (back):

353.8 mm (13.93 in.)

Depth:

758.8 mm (29.88 in.)

Angle:

18° wedge

Net Weight:

55.8 kg (123 lb)

Shipping Weight:

59.9 kg (132 lb)

600 Cecil Street, Buchanan, MI 49107

TM

8

616/695-6831, 616/695-1304 Fax

©Telex Communications, Inc., 1999 • Litho in U.S.A.

Part Number 534830 Rev.B—9934SPEAKERS—X-Array