Qtx QX12A Manuel utilisateur

QX12A, QX15A

Active Speaker Cabinets

Order ref: QX12A (178.755UK)

QX15A (178.758UK)

User Manual

178.755UK, 178.758UK User Manual

Caution: Please read this manual carefully before operating

Damage caused by misuse is not covered by the warranty

Introduction

Thank you for choosing this QXA series active speaker cabinet, which has been designed to

offer flexible and reliable service for a wide range of sound reinforcement applications. Please

read this manual to get the best results from this product and avoid damage through misuse.

Package Contents

Please check the contents to ensure that the product has been received in good condition.

QX series active speaker

IEC mains power lead(s)

If you find any accessory is missing or the product has arrived with any problems, please

contact your retailer at once. This product contains no user-serviceable parts so make no

attempt to try to fix or modify this item yourself as this will invalidate the warranty. We

recommend you keep the original package and proof of purchase for any possible replacement

or returned demand.

Warning

To prevent the risk of fire or electric shock, do not expose this appliance to rain or moisture

and avoid ingress of water into the enclosure. To prevent electric shock do not remove the

cover. No user serviceable parts inside. Refer servicing to qualified service personnel.

Safety

Prior to connecting mains, ensure that the supply voltage is correct and the mains lead is in

good condition. If the mains fuse blows, refer the unit to qualified service personnel.

Placement

Keep the unit out of direct sunlight and away from heat sources.

Place the unit in an upright position during use and storage.

Keep the unit away from moisture or dusty environments.

Cleaning

Use a soft cloth with a neutral detergent to clean the cabinet, panel and controls.

To avoid damage, do not use solvents to clean this equipment.

178.755UK, 178.758UK User Manual

Rear Panel

Setup & Operation

With VOLUME and GAIN controls turned down and power switch off, connect the IEC mains

lead to an appropriate mains outlet.

If a microphone is to be connected directly into the QRC active speaker, connect it to Channel

1 via XLR or 6.3mm jack and select “MIC” on the sensitivity switch (1). Alternatively, a line

level signal may be connected to Channel 1 providing that “LINE” is selected on the sensitivity

switch. Connect output of a mixer or any line level signal via RCA lead into Channel 2.

If the combined CH1+CH2 signal is to continue to further active speakers, connect these from

the OUTPUT BAL line level XLR. BASS and TREBLE controls should remain pointing vertically

(12-o-clock position).

Press the power switch on and, if the input is connected to Channel 1, turn the Channel 1

GAIN control up gradually. Whilst turning up the Channel 1 GAIN control, make sure the line or

mic signal is being fed into the Channel 1 input at its maximum level by either turning up the

mixer or line input device to full volume or making the loudest sound through the microphone.

Paying attention to the LED at the top of the Channel 1 section, increase GAIN until the LED

begins to illuminate red and then turn down slightly until the red illumination disappears.

For Channel 2, increase the GAIN part way to allow some signal through to the speaker to

check the sound.Turn up the MASTER VOLUME control until the input signal is heard through

the speaker and continue increasing until the desired volume level is reached.

1. MIC/LINE –Ch.1 input sensitivity switch & LED

2. CH1 INPUT BAL –Ch.1 XLR or 6.3mm input

3. GAIN –Gain control for Ch.1 input

4. BASS –Bass EQ control for Ch.1 input

5. TREBLE –Treble EQ control for Ch.1 input

6. ECHO –Echo effect level control for Ch.1

7. OUTPUT BAL –XLR signal output Ch.1 + Ch.2

8. MASTER VOLUME –Master output control

9. POWER –Mains power switch and LED

10. MAINS INLET –IEC inlet & fuse holder

11. Ch.2 INPUT –Twin RCA line input (summed)

12. GAIN –Gain control for Ch.2 input

13. BASS –Bass EQ control for Ch.2 input

14. TREBLE –Treble EQ control for Ch.2 input

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.

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