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General Description
The QM450a powered speaker is a two way
active bass reflex design suitable for mobile
and installation use.
Hybridtec Amplifier Technology
The amplifier power is supplied by Quest
Engineering’s new “Hybridtec” digital class D
and analogue class A/B amplifier system. The
Hybridtec amplifier is controlled by an internal
analogue system controller. Simplified
Controls on the rear of the QM-450A make
operation easy. The QM-450A features an XLR
input, XLR link output, Gain control, 110Hz
High Pass/voice boost switch as well as
individually coloured Peak\Clip\Signal\Power
LED indicators providing clear and immediate
visual indicators.
The QM450A is a multi-purpose loudspeaker
equally at home as a front of house system
or as a powered foldback monitor. The
asymmetrical high frequency wave guide can
be rotated to a wide coverage in foldback
modes to give uniform close field coverage
without feedback inducing hot spots.
This type of hybrid design is to save weight,
lower potential heat output and also improve
sonic performance. A limiter monitors RMS
power for excessive input level.
Limiters and compressors are not a substitute
for sensible operation. The system will
sound its best when mixers and other signal
processors are not driven into distortion.The
design characteristics make the QM450A
suitable for both full range use or as the
Mid-High component of a multi way system
with bass enhancement. Coupled with a
Quest Engineering compact sub bass, the
QM450A can act as part of a compact array,
or stand alone point source multi way system
for full range sound at medium to high sound
pressure level.
Temporary installation is possible with the
Addition of a 35-36 mm speaker stand. Wall
mounting in the vertical and horizontal plane
is possible with WB350i wall mounting kit.
Installation
Temporary installation is possible with the
35mm floor stand mounting in the base of
the enclosure. Fold-back installation can give
extra uniform stage performance by rotating
the horn flare to the “fold-back” position.
Three M8 threaded inserts are installed for
installation brackets. Two on the top and one
on the base of the QM450A enclosure.
Accessories
WB350i Wall bracket vertical or horizontal
mounting
Functional Design
The QM450A features an asymmetrical
horizontal angle along one side which makes
it suitable for use as a stage\foldback wedge
when laid flat.
Solid Build Construction
The QM450A is well suited to all professional
applications. The high grade lightweight ply
casing is specially formulated to withstand
demanding use and the heavy gauge
power-coated steel grill ensures the driver
and horn are always protected.
WARNING
Flying the box from one insert must not
be attempted! Improper installation may
result in damage, injury or death.
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