AVSL PH User Manual

MODEL NUMBER

PH SERIES PA HEADS

Item ref: 178.734UK, 178.736UK

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 a QTX PH series PA Head as part of your sound reinforcement system. This
mixer-amplifier is 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 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
 Speaker leads should be of good quality and have cores which are capable of the power output
 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
 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

178.734UK 178.736UK User Manual

Input Channel

17.

Mains voltage selector

20.

Speaker outputs (wired parallel)

18.

Mains power on/off switch

21.

Cooling fan vent

19.

IEC mains inlet and fuse holder

1. Microphone input (balanced XLR)

2. Line input (unbalanced jack or 2 x RCA)

3. Low frequency EQ control

4. High frequency EQ control

5. Delay effect level

6. Channel output level

Master Section

7. Delay effect master level control

8. Delay effect time control

9. Delay effect repeat control

10. AUX input connectors (2 x RCA)

11. Master level output control

12. AUX input level control

13. USB/SD player level control

14. REC output connectors (2 x RCA)

15. Power and level meter LEDs

16. Graphic EQ frequency sliders

Note: AUX IN and REC OUT connections (10, 14) are on the rear panel of PH4150

Rear Panel

178.734UK 178.736UK User Manual