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UG10570-2.0 - Incubus System User Guide V2.0
9 Appendix
Air Array architectural specifications
The loudspeaker shall be an active three-way system with independent dedicated
amplification consisting of four high power 12” (304.8 mm) horn loaded low frequency
(LF) transducers, a mid frequency section consisting four 3” (76.2 mm) mid frequency (MF)
compression drivers with attached waveguides and six 1” (25.4 mm) high frequency (HF)
compression driver mounted on a waveguide to allow constant directivity.
Two hyperbolic horns fed from a split manifold and driven by the four LF transducers shall
provide the low frequency section. Each LF transducer shall be enclosed in an independent
moulded fibreglass enclosure featuring a heatsink cooling system to reduce power
compression levels. Mid frequency transducers are in a sealed enclosure mounted in a V baffle
configuration for a more coherent radiation pattern over frequency range. HF transducers
shall be arranged in a line source configuration positioned on a physical arc, providing a virtual
common feed point, resulting in an improved directivity pattern control and higher SPL over
the high frequency range. Line source behavioural conditions are met by all sections hence
allowing frequency and power shading within a single enclosure.
The LF transducers shall be constructed on a cast aluminium frame, with a treated paper cone,
101.6 mm (4”) voice coil, wound with copper wires on a high quality voice coil former
and neodymium magnets, for high power handling and long term-reliability. Each 3” MF
transducer shall have a 6” diaphragm reproducing frequencies down to 500 Hz, and shall be
mounted on a high standard waveguide with path length compensation for a better directivity
pattern control over the frequency spectrum. The HF transducers shall project sound through
a high precision planar waveguide to achieve pattern control and low distortion.
Performance specifications for a typical production unit shall be as follows: the usable on-
axis bandwidth shall be 90 Hz to 26 kHz (±3 dB), with an average 45° directivity pattern on
the vertical axis and 90° on the horizontal one (-6 dB down from on-axis level) from 1 kHz
to 12 kHz; maximum SPL of 146 dB peak measured at 1 m using IEC268-5 pink noise. Power
handling shall be 3600 W AES for the LF section at a rated impedance of 2 x 4
Ω
, 800 W AES
for the MF section at a rated impedance of 2 x 4
Ω
and 320 W AES for the HF section at a rated
impedance 2 x 5.3
Ω
. The system shall be powered by its own dedicated power amplification
modules with DSP management, from which crossover points will also be set. The wiring
connection shall be via two Neutrik speakON™ NL8. The left NL8 shall be used to power the
LF section and the right one shall power the MHF section.
The enclosure shall be of a fibreglass composite with a smooth cellulose finish of any RAL
colour. The system shall be stack mounted with a dedicated stand or can also be flown with a
load tested suspension system. The external dimensions of the enclosure shall be (W) 944 mm
x (H) 1240 mm x (D) 813 mm (37.2” x 48.8” x 32”). Weight shall be 144.8 kg (319.2 lbs) including
stand.
The loudspeaker shall be the Void Acoustics Air Array.
