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user manual
QLight
series
TQ-440SP manual
page 9
System Requirements
The TQ-440SP is a self-powered loudspeaker system. It comprises two independent amplifier
channels: one channel to power the low frequency driver (LF) plus another channel to power the
midrange (MF) and high frequency (HF) together; and a frequency dividing network to split the
signal and feed it to the appropriate driver section. Additional features such as accurate and
optimised peak limiters for both high and low frequency sections are incorporated into the control
electronics. The TQ-440SP does not require the use of external amplifiers or crossover/limiters.
Additional TQ-440SP units may be daisy-chained together simply by linking the signal connections
throught the input / link XLR connectors. In this way exact coverage of an event or permanent
installation may be achieved using a number of self-powered loudspeakers. It is however
necessary to route individual power cords to each enclosure as it is not possible to daisy chain
through the power connectors.
AC power requirements
The TQ-440SP is equipped with a Neutrik Powercon AC mains connector, which mates with the
power cord supplied with your unit. The TQ-440SP operates with mains voltages either in the
range from 100 to 120 volts a.c. or from 220 to 240 volts a.c. The mains voltage on your unit will
have been preset at the factory prior to shipment. However for clarification please check that both
the product and the power cord match the mains supply available in your area before use.
Should it be necessary to alter the mains voltage setting, for example when touring a country with
mains voltage supply differing from that of the country of original shipment, the mains voltage
switch is located on the inside of the amplifier module adjacent to the mains transformer. Follow
the instructions given in the Maintenance section of this manual for removal of the amplifier
module, and change the voltage setting to match the available supply.
The mains fuse is a 3.15A 20mm anti-surge type for 230v mains supplies, and 6.3A 20mm anti-
surge type for 115v mains supplies. Should it ever be necessary, always replace the fuse with the
identical size and type.
Power Amplifiers
The TQ-440SP is equipped with two high power amplifiers designed with sufficient headroom to
handle large signal transients without break up or distortion, in contrast to other self-powered
designs which attempt to compromise using inadequately powered amplifiers. The LF amplifier
delivers 250 watts r.m.s., while the MF/HF amplifier delivers 150 watts r.m.s.