AVSL 178.758 QX15A - Manual (Page 4)

178.755UK, 178.758UK User Manual
If the channel 2 signal is too low at this point, increase the GAIN to the desired level, taking
care to avoid the signal distorting.
Each channel has BASS and TREBLE EQ controls which may be adjusted to the desired tone.
Channel 1 also has an ECHO control which adjusts the level of echo effect applied to the
microphone input for singers. When using a microphone, care must be taken to avoid
feedback (loud squealing or howling sounds caused by the microphone being able to “hear” its
own sound through the speaker) This can be avoided by keeping the microphone faced away
from the speaker and avoiding high settings of GAIN, TREBLE, BASS and ECHO controls.
Before switching the QRC active speaker off, turn down the MASTER VOLUME control to avoid
loud clicks through the speaker. Remove the power lead if the unit is not to be used for long
periods of time
Specifications
QX12A QX15A
Power supply 220-240Vac 50/60Hz
Main driver 300mm (12”) 4Ω 380mm (15”) 4Ω
HF unit 38mm (1.5”) Ti comp driver 50mm (2”) Ti comp driver
Output power RMS 200W 250W
Output power Max 400W 500W
SNR 87dB
THD 0.1%
Dispersion 90° x 60° (H x V)
Frequency response 45Hz – 20kHz 40Hz – 20kHz
Max SPL 127dB 129dB
Dimensions 345 x 565 x 320mm 420 x 675 x 370mm
Weight 13.2kg 17.8kg
Troubleshooting
No output and no LEDs lit
Check POWER switch is on
Check mains lead is connected
Check mains fuse hasn’t blown
Power LED lit but no
sound from external
inputs
Check leads are OK and connected properly
Check volume and on/off switch on external mic or line source
Check VOLUME controls are not fully down
Disposal: The “Crossed Wheelie Bin” symbol on the product means that the product is classed as Electrical or
Electronic equipment and should not be disposed with other household or commercial waste at the end of its useful life.
The goods must be disposed of according to your local council guidelines.
Errors and omissions excepted.
Copyright© 2014. AVSL Group Ltd.