adastra UX Series Compact High Power 100V Mixer Amplifiers User Manual

adastra UX Series Compact High Power 100V Mixer Amplifiers

Caution : Please read this manual carefully before operating
Damage caused by misuse is not covered by the warranty

Introduction

Thank you for choosing an Adastra UX-series mixer-amplifier as part of your public address system. This unit is designed to offer high quality, dependable service for mobile and installed systems. Please read this manual to gain the best results from your product and avoid damage through misuse.

SAFETY SYMBOL AND MESSAGE CONVENTIONS

• CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN
• This symbol indicates that dangerous voltage constituting a risk of electric shock is present within this unit
• This symbol indicates that there are important operating and maintenance instructions in the literature accompanying this unit.

SAFETY NOTICE

1. Prior to use, read through this manual
2. Keep the manual in good condition
3. Pay attention to safety warnings
4. Observe all operating requirements
5. Do not use the device near water or wet areas
6. For cleaning, only use a lint-free, dry cloth
7. Install according to the specifications
8. Place away from heat sources or heating appliances
9. Use mains lead provided and avoid damage to cable or connectors
10. Unplug power from mains during stormy weather or if unused for long periods
11. In case of malfunction, water ingress or other damage, consult qualified service personnel
12. Do not place in damp areas or near liquids or moisture. Do not spill liquids on the housing
13. Please pay attention to warning symbols during transit and placement
14. Terminals marked with the symbol are HAZARDOUS LIVE and should only be connected by qualified personnel
15. Ensure that the apparatus is connected to a mains socket with a protective EARTH connection
16. Ensure correct operation of the mains switch

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
• Use double insulated speaker wire with adequate current rating for 100V speaker connections
• Only use 1 type of output – i.e. 8Ω or 100V – do not mix or combine these outputs on a single zone
• Do not connect 8Ω speakers to the 100V terminal or 100V speakers to the 8Ω terminal
• 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
• For rack-mounting, use the supplied accessories and ensure adequate support
• Ensure adequate airflow 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

Rack mounting

The UX series amplifiers can be mounted into a 19” rack cabinet using the supplied rack accessories.
As shown below, the 2 joining brackets link a pair of UM series amplifiers together to form a full-width 1U rack-mount pair. One rack ear can be mounted at each end for fixing to the rack strip.

Wall or under counter mounting

The rack mounting accessories can also be attached so that the amplifier can be mounted against a wall or under a counter or work surface. To do this, mount the rack ears with the tabs aligned with the top of the housing to provide mounting holes to screw the amplifier to the underside of a work surface or against a wall with the controls visible vertically.

Front panel

1. Audio player section

2. MIC input volume control

3. AUX input volume control

4. PLAYER volume control

5. BASS EQ control

6. TREBLE EQ control

7. MASTER volume control

8. VU meter
   Rear panel

9. IEC power inlet

10. Mains fuse holder

11. On/Off power switch

12. Speaker output terminals

13. LINE OUT 2 x RCA sockets

14. AUX IN 2 x RCA sockets

15. PHANTOM + VOX DIP switches

16. MIC input XLR/jack socket

17. 24V Emergency Mute trigger terminals

18. FM/DAB+ antenna connection (F-type)

Connection and setup

• Connect the rear IEC inlet (9) to the mains using the supplied mains lead (or an equivalent approved type).
• Connect a microphone (if required) to the rear panel MIC input (16) via XLR or jack.
• Connect a line level audio input (if required) to the AUX IN connectors (14) on the rear panel using good quality RCA leads. An additional 3.5mm AUX line input is provided on the front panel for connecting a playback device such as a smart phone or MP3 player and is controlled through the audio player section. Further amplifiers can be connected from the rear LINE OUT sockets (13)
• For stable DAB+ or FM radio reception, connect the Antenna ‘F’ type socket (18) to a suitable antenna.
• For buildings with a fire or security panel with 24Vdc trigger output, this trigger output can be connected to the 24V MUTE terminals (17), which will mute all except the mic input when 24V is present on the terminals. (The 24V contacts can be connected with either polarity +/- or -/+ to operate)
• The UX series amplifiers can be used either as 100V line amplifiers or 2Ω low impedance power amplifiers. These 2 configurations cannot be used together, so it is important to decide which method to use at the start.

100V line systems

• For 100V line systems, connect the amplifier to the first speaker in the system using double-insulated speaker wire which has adequate current rating to handle the total output of the amplifier.
• Connect the “100V” output terminal to the positive (+) connection of the speaker and “COM” output to the negative (-) connection of the speaker (12). Connect further speakers in parallel to the first speaker with all positive terminals connected together and all negative terminals connected together as shown below.
• A 100V line speaker system can comprise of many speakers connected together. The determining factor for how many speakers can be used on a single amplifier is the power rating. For most purposes, it is advised to connect as many speakers as needed with a combined wattage of no more than 90% of the amplifier’s output power rating.
• The terminals of a 100V speaker are connected to a transformer and in some cases, this transformer may be “tapped” for different power ratings. These tappings can be used to adjust the wattage (and output volume) of each speaker in the system to help achieve the ideal total power of the system for the amplifier.

Low impedance systems

• The UX120/UX240 amplifiers can alternatively provide an output for low impedance speakers by connecting the “2Ω” output to the positive (+) speaker connection and “COM” output to the negative (-) speaker connection. It is important to ensure that the total speaker load is no lower than 2Ω and that the power handling of the connected speakers is equal to or greater than the output power of the amplifier.
• For example, 4 x 8Ω speakers can be connected in parallel to combine as a 2Ω load, with each handling a quarter of the amplifier’s output. It is also acceptable to connect 1, 2 or 3 x 8Ω speakers this way, or even 4Ω and 16Ω speakers if needed. In all cases, the total load cannot be lower than 2Ω and able to handle the output power of the amplifier.

Operation

• When all connections to the amplifier are made, turn all volume controls down (keeping TREBLE and BASS at the vertical 12 o’clock position) Switch on the power (11) and the “ON” LED will illuminate.

• Ensure a signal is being fed to the AUX IN input and gradually increase the MASTER rotary control (7) part way for testing. Increase the AUX rotary (3) until the output is heard through the speakers. Turn up the MASTER to the maximum required volume level and reduce the AUX IN control if necessary.
  Note : If a line input is not connected to a UX-series mixer-amplifier, the initial test can be made using the built-in audio player. See section below for instructions.

• If a microphone is connected, make sure it is switched on and gradually increase the MIC control (2) whilst speaking into the microphone until the required volume level is reached. The microphone should not be able to “hear” the speakers, which can cause feedback (squealing or howling noise).

Audio player

• The UX-series mixer-amps are each fitted with a built-in audio player.
• The audio player has a Bluetooth receiver, USB mp3 player and a DAB or FM tuner. Pressing the SOURCE select button will step through Bluetooth, USB, DAB and FM tuner modes.

Pressing the MUTE button for any source will mute the output.
Holding the MUTE button powers down the player section and pressing it again powers it up again.

Settings menu
The audio player has a menu for global settings, which can be accessed by holding down the SOURCE button. Press and to step through menu pages and to select an option. Press REPEAT / … to go back.

Setting| Press 4;| Press 4; to step through settings and enter. Use 9 and : to adjust values
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| <Set Time/Date>| DD-MM-YYYY… HH:MM
<Set 12/24 hour>| <Set 24 hour> / <Set 12 hour>