Q-SERIES

POWER AMPLIFIERS

Item ref: 172.051UK, 172.052UK, 172.054UK, 172.055UK

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 the QTX Q series power amplifiers as part of your sound reinforcement system. These amplifiers are designed to offer high quality, dependable service for mobile and installed systems. Please read this manual fully and follow the instructions to achieve the best results with your new purchase and to avoid damage through misuse.

Warning

To prevent the risk of fire or electric shock, do not expose any of the components to rain or moisture.

If liquids are spilled on the casing, stop using immediately, allow unit to dry out and have checked by qualified personnel before further use. Avoid impact, extreme pressure or heavy vibration to the case

No user serviceable parts inside – Do not open the case – refer all servicing to qualified service personnel.

Safety

 Check for correct mains voltage and condition of IEC lead before connecting to power outlet

 Ensure speaker leads are good condition with no short connections or damaged plugs

 Check impedance of speaker loads do not exceed the minimum stated load for the amplifier

 Do not allow any foreign objects to enter the case or through the ventilation grilles

Placement

 Keep out of direct sunlight and away from heat sources

 Keep away from damp or dusty environments

 When rack-mounting, ensure adequate support for the base of the amplifier and firm fixings for the front

 Ensure adequate air-flow and do not cover cooling vents at the front and rear of the amplifier

 Ensure adequate access to controls and connections

Cleaning

 Use a soft cloth with a neutral detergent to clean the casing as required

 Use a vacuum cleaner to clear ventilation grilles of any dust or debris build-ups

 Do not use strong solvents for cleaning the unit

Unpacking

Your QTX Q series amplifier should arrive in good condition with the appropriate mains IEC lead(s)

If any contents are missing or damaged, contact your dealer immediately.

Q240/Q480/Q600/Q1000 User Manual

Layout

1. Cooling vents – do not cover

2. LED Clip indicators

3. Channel gain controls

4. Power on/off switch and LED

5. LED Signal indicators

6. IEC mains inlet and fuse holder

7. Voltage selector

Operation

8. SPK speaker outputs

9. 4mm binding post speaker outputs

10. 6.3mm jack speaker outputs

11. L+R line inputs (6.3mm jack)

12. L+R line inputs (RCA)

13. Cooling fan – do not cover

Connect speaker cabinets to speaker outputs (8, 9 or 10) using good quality leads and ensure that the combined load on each channel is no lower than 4Ω (for speaker loads connected in parallel, 8Ω + 8Ω = 4Ω)

Connect each signal input from mixer or other line level source via the jack (11) or RCA (12) connectors on the rear panel using good quality signal leads. The jack and RCA inputs are wired in parallel, so whichever is not used for the input signal can be used to connect onto further amplifier inputs.

Connect the amplifier to the mains outlet, making sure that the IEC lead is earthed, in good condition and connected securely. Ensure the correct voltage is selected on the rear panel voltage selector (7)

With channel gain controls (3) turned fully down, switch the power switch (4) on.

With mixer (or other signal source) levels turned down, gradually increase the amplifier’s channel gain controls to the required level (normally full) and then gradually increase the signal level from the mixer or sound source until sound can be heard through the speakers and then continue increasing up to the required level.

During use, the Signal LEDs (5) will illuminate to show that the signal is present. If the Clip LEDs (2) illuminate more than very briefly, reduce the volume until they hardly light up at all. This will avoid distortion or

“clipping” through the speakers.

Before powering down, turn the channel gain controls fully down to avoid loud noises when switching off.

Q240/Q480/Q600/Q1000 User Manual

Specifications

Power supply

Q240

110/240Vac, 50/60Hz

Q480 Q600

Fuse rating T2A/T4A (240V/110V) T5A (240V) / T10A (110V)

Power max: 4Ω 2 x 120W 2 x 240W 2 x 300W

Power rms: 4Ω

Power rms: 8Ω

Freq.response

2 x 60W

2 x 40W

20Hz - 20kHz

2 x 120W

2 x 80W

2 x 150W

2 x 100W

Input connectors 2 x RCA / 2 x 6.3mm jack

Input sensitivity 775mV, 10k ohms

Min. impedance 4Ω

Speaker outputs SPK connectors / 6.3mm jacks / 4mm Binding Posts

S/N ratio >98dB

Q1000

2 x 500W

2 x 250W

2 x 160W

THD

Dimensions

Weight

Troubleshooting

5.2kg

No power light on front panel switch

Power light is on but no other LEDs and no output

Power light and Signal

LEDs are lit but no output

Case getting hot

<0.5%

482 x 240 x 88mm

Output is very distorted and CLIP LEDs are lighting

Output is working but at very low level

482 x 300 x 88mm 482 x 300 x 88mm 482 x 380 x 88mm

6.45kg 7.35kg 9.0kg

Ensure IEC inlet is connected to mains and lead is in good condition

Ensure mains outlet is switched on

Check input signal and connection leads

Ensure channel gain controls are not turned fully down

Check speakers are in good working order and not shorted (use a multi-tester)

Check speaker leads are in good condition and connected properly

If speakers/leads OK, switch off again and refer to qualified service personnel

Ensure cooling vents are clear and fan is working (refer to technician if not)

Check the speaker impedance is not below the rated Ohms

Turn down the input level from audio source

Turn down channel gain controls

Ensure input source is at line level

Increase input level from audio source

Turn up channel gain controls

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© 2015. AVSL Group Ltd.

Q240/Q480/Q600/Q1000 User Manual