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UG10567-1.0 - Cyclone 4 User Guide V1.0
7 Appendix
The loudspeaker shall be a passive two-way system consisting of one 4” (102 mm) direct
radiating reflex loaded low frequency (LF) transducer and one 3/4” (25 mm) diameter co-axial
soft dome tweeter high frequency (HF) transducer. The co-axial transducer shall be constructed
on a cast aluminium frame, with the low frequency transducer consisting of a polypropylene
LF cone with its dust cap removed and a 25.5 mm (1”) voice coil, wound with copper wire on
a high quality Kapton voice coil former, for high power handling and long-term reliability. The
high frequency soft dome transducer shall be bolted through the rear of the magnet structure
belonging to the low frequency transducer to form a coaxial drive unit. The sound will project
through the centre of the low frequency transducer and uses the 102 mm (4”) baffle diameter 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 17.8 kHz (±3 dB) and shall average 80° directivity pattern in the
horizontal axis and 80° in the vertical one (-6 dB down from on-axis level) from 1 kHz to 12 kHz;
maximum SPL of 107 dB peak measured at 1 m using IEC268-5 pink noise. Power handling shall
be 30 W AES at a rated impedance of 16
Ω
. The system shall be powered by its own dedicated
power amplification module with DSP management.
The wiring connection shall be via a single removable lockable wiring connector with four
screw-down terminals (one pair for input and one pair for loop-out to another loudspeaker)
to provide secure wiring and to allow for pre-wiring of the connector before the installation.
This connector should then screw lock to the enclosure to ensure secure attachment. The
enclosure, of any RAL colour, shall be of an injection moulded ABS construction with a smooth
cellulose finish and shall include integral threaded inserts for the fitment of wall and ceiling
mounting hardware. The external dimensions of the cabinet shall be (H) 150 mm x (W) 179 mm x
(D) 175 mm (5.9” x 7.1” x 6.9”). Weight shall be 1.3 kg (2.7 lbs).
The loudspeaker shall be the Void Acoustics Cyclone 4.
Architectural Specifications
