QSA 300 ACTIVE SPEAKER User Manual
QSA 300 User Manual CONTENTS Contents Safety Installation Connections Glossary Operating Tips Troubleshooting Inputs & Outputs Specifications Accessories User Manual QSA 300 Active Speakers P.01 P.02 P.03 P.04 P.05 P.06 P.07 P.08 P.
QSA 300 User Manual Flying and installation of this speaker cabinet must be carried out by suitably qualified personnel following the approved safety standards. Do not expose the speaker cabinet to direct precipitation or stand in water. Liquid getting into the box will risk a short circuit and will be hazardous. Do not attempt to clean the plastic enclosure with solvents or petrochemical based cleaners.
QSA 300 INSTALLATION User Manual 2 Description Safe Installation Procedures The QSA speaker range is a two way active bass reflex design suitable for mobile or installation use. The amplifiers are a highly efficient bi-polar split rail design capable of high power yet are light in weight. There are separate amplifiers for the high and low frequency drivers and both are protected by high speed limiter circuits that monitor peak and RMS power.
QSA 300 User Manual 10 6 8 11 7 14 15 12 16 4 9 13 CONNECTION 5 3 3 1 2 1. Power supply input. Make sure that the voltage selector is set for your Country’s correct voltage. 2. Protection fuse. Use only fuses of the correct Amp rating. If it blows more than once, return the box to a Quest Engineering service centre. 3. Power on/off switch. 4. Microphone level (low impedance) input. 5. Microphone balanced input volume control. 6. Microphone input overload indicator 7.
QSA 300 User Manual Pre amplifier: That part of the signal chain where a signal from a microphone, turntable, CD player or other signal source is first amplified. This will normally be at the input of a mixer and is necessary to boost the signal enough to be then mixed and amplified by a power amplifier. Compression: An electronic device that reduces the dynamic range. In other words, makes the loud parts of the music less loud and the quiet parts appear louder.
QSA 300 Operating tips To avoid overloading the pre amp inputs, always operate the master volume at a high level and control the volume from the input volume. The ideal situation is to have all the components of the audio chain operating at the same operational range. Do not run the system with the mixer “peaking in the red” while the box is turned down.
QSA 300 User Manual TROUBLESHOOTING Trouble shooting 6 Buzzes and noises in the sound system. Getting rid of unwanted noises is a study in itself. Most of the noise, (apart from undesirable program) will fall into three categories. (A) White noise. This is the hiss that suggests that the gain structure is set incorrectly. Something in the signal chain is boosting too much or an input is set too sensitive. If your equipment has gain switches on it, set them all the same.
QSA 300 Inputs and outputs The inputs can accept both XLR and phono connectors. If you are connecting multiple boxes together is unprofessional practice to use a mixture of both phono and XLR types of leads. Use one or the other otherwise an out of phase situation can result. Tips on “flying clusters” When very high output or broad coverage is required, it is common practice to assemble an array of speakers together.
QSA 300 User Manual SPECIFICATIONS Quest Engineering QSA 300 Specifications* 8 Type Self contained bi-amplified bass reflex Loudspeakers 1 diameter 300mm (12”) woofer High powered 80mm (3”) voice coil Titanium diaphragm Angle of Coverage 90 X 60 degrees Maximum SPL 123 dB (Nominal) 127 dB (Peak) Processor section Crossover frequency 1800 Hz (24dB/oct) Loudspeaker protection Thermal - over excursion - multi band input limiting Amplifier section Type Fully discrete bi-polar split rail high e
QSA 300 User Manual Accessories QB350 QSSAL Protective nylon padded speaker bag Heavy duty aluminium speaker stand with carry bag ACCESSORIES Accessories 9 QSA 300 User Manual Active Speakers
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