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UG10519-2.0 - Air Motion User Guide V2.0
7 Appendix
The loudspeaker shall be an active, three-way, bi-amped system consisting of a high power
12” (305 mm) isometric conical horn loaded low frequency (LF) transducer with a passive
two way, mid-high frequency section consisting of an 8” (200 mm) isometric conical horn
loaded mid frequency (MF) transducer and a 1.5” (38.1 mm) diameter exit high frequency
(HF) compression driver.
Low frequency (LF), mid and high frequency (MF and HF) transducers shall be enclosed in
separate and independent moulded conical fibreglass cabinets with a smooth, high gloss
finish of any RAL colour.
The LF and MF transducers shall be constructed on a cast aluminium frame, with a treated
paper cone, 63.5 mm (4”) for the LF and 50.8 mm (2”) for the MF voice coil, wound with
copper wires on a high quality voice coil former, for high power handling and long-term
reliability. The HF transducer shall project its sound through an elliptic conical waveguide
with a 200 mm (8”) baffle diameter.
Performance specifications for a typical production unit shall be as follows: the usable on-axis
bandwidth of 140 Hz to 20 kHz (±3 dB), with an average 50° directivity pattern on the vertical
axis and 60° on the horizontal one (-6 dB down from on-axis level) from 1 kHz to 12 kHz;
maximum SPL of 137 dB peak, measured at 1 m using IEC268-5 pink noise. Crossover points
shall be at 140 Hz and 600 Hz for the LF section and 1.7 kHz passive for the MHF. The system
shall be powered by its own dedicated power amplification module with DSP management,
with the wiring connection via two Neutrik speakON™ NL4; one for input and one for link out
to another speaker.
The aesthetically designed enclosures shall be bolted onto a powder-coated steel frame
using a minimum of four M8 bolts per horn. This frame aligns the horns in the correct
acoustic space to achieve a good directivity across the loudspeaker system’s entire
spectrum. The frame will incorporate mounting holes for a ‘U’ bracket fixture for fitment to
ceiling and wall mounting brackets. The external dimensions of the enclosures and frame
shall be (W) 854 mm x (H) 672 mm x (D) 658 mm (33.6” x 26.5” x 25.9”). Weight shall be 35.4
kg (78 lbs).
The loudspeaker shall be the Void Acoustics Air Motion V2.
Architectural specifications