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9 Appendix
The loudspeaker shall be an active two way bi-amped system consisting of twelve high power 6.5”
(165.1 mm) direct radiating low frequency (LF) transducers, and eight 1” (25.4 mm) high frequency
(HF) compression drivers, each mounted on a dedicated waveguide.
With twenty discrete proprietary drive units, Virtual Arc technology is implemented on every
component to form a common virtual point source rearwards of the array resulting in a better and
more controlled directivity, coherence, phase and time alignment between all components.
The LF transducers shall be constructed on a cast aluminium frame, with a treated paper cone, 44
mm (1.7”) voice coil, wound with copper wires on a high quality voice coil former and neodymium
magnets, for high power handling and long term-reliability. The HF transducers shall project their
sound through a high precision constant directivity wave-guide, with a 76.2 mm (3”) bae diameter,
to achieve directivity pattern control between the dierent drivers with no cancellations and low
distortion.
Performance specifications for a typical production unit shall be as follows: the usable on-axis
bandwidth shall be 78 Hz to 21 kHz (±3 dB) and shall average 50° directivity pattern on the vertical
axis and 110° on the horizontal one (-6 dB down from on-axis level) from 1 kHz to 12 kHz; maximum
SPL of 141 dB peak measured at 1 m using IEC268-5 pink noise. Power handling shall be 2700 W
AES for the LF section at a rated impedance of 2 x 5.3 Ω and 640 W AES for the HF section at a
rated impedance 2 x 4 Ω. The system shall be powered by its own dedicated power amplification
modules with DSP management, from which crossover points will also be set, with the wiring
connection via one Neutrik speakON™ NL8.
The enclosure shall be of a special 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 suspended with a
load tested suspension system. The external dimensions of the enclosure shall be (W) 561 mm x (H)
1266 mm x (D) 430 mm (22.1” x 49.8” x 16.9”). Weight shall be 73.4 kg (161.8 lbs) including stand.
The loudspeaker shall be the Void Acoustics Nexus 6.
Architectural Specifications
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