EM Acoustics HALO bi-amplified line array system - Manual (Page 5)

Page 5 of 39
HALO system User Manual
V2.2 August 2010
2.0 - The HALO System
The HALO system comprises two loudspeaker models and associated flying hardware.
Details of the different components are given below – all enclosures and flying grids work
on the same principles and use similar if not identical hardware.
a) HALO 3-way biamplified line array loudspeaker
The HALO enclosure is a three-way, bi-amplified design incorporating some of the
most advanced loudspeaker technologies available today. The centerpiece of the
HALO enclosure is the bespoke Air Motion Transducer, coupled to our patent-
pending variable diffraction manifold. This combination gives seamless 90-degree
coverage from 2KHz right up to 18KHz. Integral flying hardware allows for quick &
easy array assembly, with each enclosure pivoting on the diaphragm of the ribbon
transducer thereby keeping the distance between adjacent HF units constant. Two
flat-diaphragm 6.5” drive units handle midrange frequencies, linked via an internal
passive crossover to two LF 6.5” drive units to extend the enclosure response
down to 75Hz.
b) HALO-S compact flyable subwoofer
The HALO-S subwoofer is based upon the hugely successful EMS-215 dual 15”
quasi-bandpass subwoofer. Incorporating flying hardware following the same
concept as the HALO enclosure, plus a detachable base board for ground-stacking
and storage.
c) MFG-HALO master flying grid
The MFG-HALO grid is the main grid for the HALO system which can be used for
flying HALO enclosures on their own, but must be used to suspend HALO-S
subwoofers.
d) FG-HALO compact flying grid
The more compact FG-HALO grid can be used for flying HALO enclosures alone,
and is often the better choice where smaller numbers of HALO enclosures are
required and/or less down-angle for the array is required.
e) SLG-HALO sub-link flying grid
The SLG-HALO link grid must be used when assembling arrays including both
HALO and HALO-S enclosures. The SLG-HALO provides the mechanical interface
between the HALO-S subwoofer and the much shallower HALO enclosure.