L-Acoustics 112XT, Operator'S Manual

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L-ACOUSTICS XT Manual V1.1 2/11/2003
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1.4 115XT SPECIFICATIONS
The 115XT is an active, two-way, coaxial full range loudspeaker containing one direct radiating, bass
reflex-loaded, 15 inch low frequency transducer and one 1.4 inch exit, 3 inch voice coil diameter,
titanium alloy diaphragm, neodymium compression driver. As a full range system, frequency response
is 60 Hz to 18 kHz with less than ± 3 dB variation and the usable bandwidth is 50 Hz to 18 kHz (-10
dB).
The cone body of the low frequency component provides pattern control loading of the compression
driver and yields an 80-degree (± 20 degree) conical dispersion pattern that is axi-symmetrical. The
crossover point between low and high frequency components is 1 kHz with 24 dB per octave
Linkwitz-Riley characteristics. Long term power handling is 250 Wrms for the low section and 85
Wrms for the high section at a nominal 8 ohm impedance. Connection to the loudspeaker is made via
two parallel 4-pin Neutrik Speakon connectors.
The 115XT enclosure has a truncated wedge shape with a curved front profile. Dimensions are 58 cm
(22.8 in) high, 44 cm (17.3 in) wide at the front of the enclosure, 16.7 cm (6.6 in) wide at the rear of
the enclosure and 47.5 cm (18.7 in) deep. When used on its rear side, the front baffle of the 115XT is
oriented at a 41 degree angle with respect to vertical, allowing the enclosure to be used as a floor
monitor. Enclosure weight is 29.5 kg (65.0 lbs).
Cabinet construction consists of 30 mm (1.18 in) and 18 mm (0.70 in) Baltic birch plywood with
internal steel bracing and joints that are sealed, screwed and rabbeted. The finish is maroon-gray high
resilient paint. The front of the enclosure is protected by a black powder-coated, 1.5 mm (0.06 in)
thick steel grill that is covered with 10 mm (0.39 in) thick acoustically transparent open cell foam.
The 115XT has two side-recessed flytrack sections and 36 mm (1.42 in) diameter pole mount sockets
mounted on the top and bottom sides. Pole mount sockets function with the ETR115XT U-bracket
accessory for rigging the enclosure in either horizontal or vertical orientations, providing angular
adjustment with 10 degree resolution. Two CPL115XT coupling adapter bars can also be used in
conjunction with the ETR115XT U-bracket, allowing two 115XT enclosures to be flown vertically
while providing independent tilt adjustment for each enclosure. The XTLIFTBAR accessory functions
with either of the pole mount sockets and provides five attachment points for rigging purposes.
The 115XT loudspeaker is used with an approved digital processor with OEM factory presets for
active 2-way operation or 3-way operation in conjunction with additional subwoofers (L-ACOUSTICS
SB115, SB118, SB218 or dV-SUB).
Figure 3: 115XT Enclosure