Description
HALO is a revolution in line array loudspeaker performance, bringing a new level of clarity, detail and realism into small-to-medium scale sound reinforcement systems. Through the use of the Air Motion Transducer at the heart of HALO, coupled with our patent-pending variable diffraction manifold, HALO is the first system to be able to use a ribbon-style drive unit of this size without the inherent beaming problems in the horizontal plane. Our manifold, designed by R&D Director Ed Kinsella, gives HALO an incredibly smooth, uniform coverage right across the operating band in the horizontal plane, whilst the innovative flying system which pivots the enclosures in the plane of the HF diaphragm, means that adjacent AMT drivers are kept a constant distance apart regardless of enclosure splay. The end result of this is that the array behaves closer to one curved radiator, rather than a number of individual radiators.
Simple and elegant
HALO is a bi-amplified system, with one channel driving the LF/MF section and one driving the HF section. The LF/MF section is comprised of four drive units - two front-firing 6.5" (165mm) high-excursion neodymium drivers for low frequencies, and two partially horn-loaded 6.5" (165mm) neodymium drivers for midrange frequencies. These MF drivers are hand made flat radiators, manufactured from a composite of a standard paper cone and a profiled EPS disc, minimising phase interference and comb-filtering effects. These two pairs of drive units are linked by an internal passive crossover network, providing seamless frequency and phase transition between the two operating bands.
Construction
The CNC-machined enclosure is manufactured from 12, 15 and 18mm (1/2", 5/8" & 3/4") multi-laminate Finnish birch ply, rebated, screwed & glued together for maximum strength.
Standard features and rigging
HALO's rigging system is simplicity in itself. It is a three-point design, where the front two points provide the main strength of the system and allow enclosures to pivot relative to each other, while the central rear point sets the enclosure splay. In this way, arrays can be assembled extremely quickly, and inter-cabinet angles can be adjusted by one person even with the array flown. Aircraft-grade quick release pins secure the system together, attached to the enclosure via steel lanyards to prevent lost parts.
HALO is finished in semi-matt textured black paint, although colours are available on request. The front of the enclosure is protected by a hex-punched steel grille, backed by acoustically-transparent fabric which can in most cases be colour-matched to the enclosure, even for custom colours. Connection is provided by two IP54-rated Neutrik STX Speakon connectors.