user manual
QLight series
NOTE: The rigging of loudspeaker systems is an extremely serious matter with potentially lethal
consequences should anything go wrong. It is of vital importance that you, or other people
rigging the system, are suitably qualified to do so and have a full understanding of all the factors
involved with safety as a number one priority. Turbosound accepts no responsibility for any
accident, damage or failure of any rigged system. This rigging information is specifically related
to the requirements of the TQ-310 and TQ-315 only. For more detailed information on the whole
topic of rigging various handbooks are available. If you are in any doubt contact your
Turbosound dealer who will be able to refer you to an experienced rigging company.
Choosing the best location
When using any QLight system, certain room parameters will affect the resultant sound quality
and coverage. For example, any boundary like a wall or floor will lift certain frequencies. If you are
placing the unit in a corner then a lift at the bass end is to be expected and it may sound rather
boomy. This can be compensated for moving the speaker or cutting low frequencies with a
graphic equaliser.
When speakers are flown in free space then boundary effects are minimised. The result is a
smooth frequency response without any boost at odd frequencies, but the bass end may appear
subjectively light. In this case increase the sub-bass level to bring the low end up.
The relationship between sound pressure level and distance is an “inverse square law” so
remember that every time the distance from the sound source is doubled the sound level
decreases by 6dB. For every 3dB increase of speaker output you need a doubling of input power
and you can work out the wattage input needed to give the required SPL levels at various
distances from the loudspeaker(s).
TQ-300 series manual
page 12
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