Xn Three
-W
ay
, LF/MB/HF System
Xn Three-Way LF/MB/HF System
3
Amplifier Recommendations
Power amplifiers with the following ratings
are recommended for use with the Xn loud-
speaker systems:
HF:
800 watts per channel
into 8 ohms
93-volts rms short term
132-volts peak
MB:
800 watts per channel
into 8 ohms
93-volts rms short term
132-volts peak
LF:
800 watts per channel
into 8 ohms
93-volts rms short term
132-volts peak
Xn loudspeakers may be paralleled with
other Xn 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
powering the X-Array
™
systems.
Crossover, Equalization and Signal
Delay Controller
The Xn is a three-way active loudspeaker
system requiring an active crossover, equal-
ization 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. Linkwitz-Riley crossover
filters with a minimum slope of 24-dB per
octave at 125 Hz and 1,760 Hz are recom-
mended, and subsonic filter protection at
50 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-Array
™
loudspeaker systems. Digital parameter
settings for both controllers are available
upon request.
Electrical Connection and System Wiring
Two semiparalleled Neutrik 8-pin Speakon
®
connectors are used for electrical connection
to the Xn loudspeakers with the following
pin assignments:
HF:
Pins 4 In / Pins 4 Out
MB:
Pins 3 / Pins 3 Out
LF:
Pins 1 In / Pins 2 Out
The Xn wiring diagram is shown in
Figure 7. Note that one connector is specifi-
cally labeled for input connection only and
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 wiring of multiple sys-
tems with amplifiers. When four Xn systems
are jumped from one to another via the
input/output connections, the amplifier home
run cable will have four HF drivers on
Pins 4 (for a 4-ohm load), four MB drivers
on Pins 3 (for a 4-ohm load), two LF drivers
on Pins 2 (for a 4-ohm load) and two LF driv-
ers on Pins 1 (for a 4-ohm load).
Flying the X-Array
™
Systems
The X-Array
™
loudspeaker systems all uti-
lize the same rigging hardware and have the
same structural strength ratings. Thus, dif-
ferent systems may be mixed in an array to
achieve the best acoustic results. The rigging
system allows for the smallest possible spac-
ing between adjacent enclosures, and uti-
lizes 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 bot-
tom. This arrangement enables the enclo-
sures to pivot vertically from the rear cor-
ners. The relative vertical angles 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 sit-
ting on top of one another. For ease of in-
stallation of the hinges and straps, the en-
closures self align using feet and cups
mounted on the top and bottom of the en-
closures. The relative horizontal angle be-
tween 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-
truded as a single-piece track/angle-bracket
aluminum assembly and ties into the top,
bottom and rear of the enclosure. Metal bars
inside the enclosure tie the top and bot-
tom track/angle-bracket assemblies to-
gether, minimizing the load applied to the
wooden enclosure. The rear extrusion will
accommodate the New Haven 32102-2 air-
craft-type double-stud locking fitting in-
stead of the hinge for applications requir-
ing a lower strength rating.
The removable front strap assemblies uti-
lize all-steel standard New Haven 32102-2
aircraft-type double-stud locking fittings
and wire rope, and are secured into an-
other proprietary track similar to the heavy-
duty aircraft L-track. The track is extruded
as a single-piece track/angle-bracket as-
sembly that ties into the front and side of
the enclosure. The track/angle-bracket as-
sembly extends from the top to the bottom
of the enclosure, eliminating the load ap-
plied to the wooden enclosure.
A complete line of flying-hardware acces-
sories is available for the X-Array
™
loud-
speaker systems including a grid, rigging
hinges and rigging straps. The variety of rig-
ging hinges and front rigging straps avail-
able include those for linking two enclosures
together, securing the top enclosure in a col-
umn to a grid, and for picking up the top
enclosure in a column without a grid. Con-
sult the X-Array
™
Accessories section for a
complete listing the available rigging acces-
sories.
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
X-Array
™
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 Xn requires only a
