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user manual
QLight™ DP series
QLight DP series manual
page 17
AMPLIFIER MODULES
Power Amplifiers
The digital power amplifiers used in QLight™ DP series loudspeakers are conservatively rated and
designed with sufficient headroom to handle large signal transients without break-up or distortion.
Each channel of the module will deliver 800 watts r.m.s. into an 8 ohm load.
AC Power Requirements
QLight™ DP series loudspeakers are equipped with Neutrik PowerCon® AC mains connectors
which mate with the power cord supplied with your unit. They operate with mains voltages in the
range from 100 to 240 volts. When connected to a mains supply the digital power amplifier
modules will automatically detect the mains supply present. The mains fuse is a 10A 20mm 230V
anti-surge type for all mains supplies. Should it be necessary always replace the fuse with the
identical size and type.
Cooling
The Class D amplifiers are among the most efficient in their class, with operating efficiencies
greater than 90%. Conventional heatsinks are not required to cool the amplifiers; they are cooled
by the action of convection from the panel of the amplifier module at the rear of the enclosure. It is
important to leave space around and especially above the rear panel to allow the convection of
heat away from the loudspeaker. This cooling effect is sufficient to maintain the amplifiers within a
normal operating temperature range.
In an ambient temperature of 25º C the rear panel of the unit can reach temperatures of 55º C and
will feel warm to the touch. This is perfectly acceptable and is considered normal operation.
Audio Input
The signal inputs are fully balanced, with an input impedance of 10kΩ. The female input XLR
connector is wired pin 2 hot (+ve), pin 3 cold (-ve), and pin 1 screen (shield). The male link XLR
connector is wired pin 2 hot (+ve), pin 3 cold (-ve), and pin 1 not connected. Multiple self-powered
enclosures may be driven from a single audio console, up to a practical limit of 16 units. A greater
number may cause unacceptable signal loss due to the loading of the console output.