adastra 953.251UK Dual Zone 100V Mixer Amplifiers With Media Player User Manual

adastra 953.251UK Dual Zone 100V Mixer Amplifiers With Media Player User Manual

Introduction

Thank you for choosing the Adastra V-series dual zone 100V 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 fully and follow the instructions to achieve the best results with your new purchase and to avoid damage through misuse.

SAFETY SYMBOL AND MESSAGE CONVENTIONS

CAUTION RISK OF ELECTRIC SHOCK DO NOT OPE
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
• Do not use 4Ω, 8Ω or 100V terminals at the same time (choose only one output)
• Do not connect 4Ω or 8Ω speakers to the 100V terminal or 100V speakers to the 4Ω or 8Ω terminals
• Do not allow any foreign objects to enter the case or through the ventilation grilles

Placement

• For rack-mounting, ensure adequate support for the weight of the amplifier
• 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

Front panel

1. Media player section

2. AUX input (3.5mm) and level control

3. MIC/LINE 1 input (6.3mm) and level control

4. MIC/LINE 2 input (6.3mm) and level control

5. MIC/LINE 3 input (6.3mm) and level control

6. Music input source selectors (CH1 and CH2

7. MUSIC Level controls (CH1 and CH2)

8. BASS EQ controls (CH1 and CH2)

9. TREBLE EQ controls (CH1 and CH2)

10. MASTER Level controls (CH1 and CH2)

11. Output status LEDs

12. POWER on/off switch
    Rear panel
    

13. IEC mains inlet & fuse holder

14. Speaker connection terminals

15. LINE OUT connectors (RCA)

16. AUX input (RCA parallel with front 3.5mm jack)

17. LINE A & LINE B inputs (RCA)

18. LINE A & LINE B level trim controls

19. MIC/LINE 1, 2, 3 DIP switches

20. MIC/LINE 1, 2, 3 screw terminal inputs

21. PRIORITY switch for MIC/LINE 1 input

22. MIC/LINE 1, 2, 3 XLR/jack inputs

23. 24V mute screw terminals

24. FM/DAB+ ANTENNA connection (F-type)

Connection and setup

V-series mixer-amps have 3 main MIC/LINE inputs, which can be connected from the front 6.3mm jack inputs (3, 4, 5) or via XLR, 6.3mm jack or screw terminal at the rear (20, 22), offering comprehensive input options. Screw terminal inputs (20) are Euroblock plug-in type and can be removed for convenience during connection.
When using condenser mics that require phantom power, use balanced wiring via the XLR or screw terminals.

It is important to match the input level of the source, whether MIC or LINE level using the DIP switches (19) as shown opposite.
The switch next to MIC/LINE selection enables PHANTOM 20V power to the XLR and screw terminals.
Note: If PHANTOM power is switched ON, use only balanced wiring to the input (not unbalanced).

MIC LINE inputs 1, 2, 3 each have a volume control above the relative front 6.3mm jack inputs (3, 4, 5) Also on the rear panel are 2 LINE INPUTs A and B (17) which can be connected via RCA connectors and have individual LEVEL trim controls (18) to adjust the input level of each.
Another RCA input is the AUX IN (16) which is parallel with the 3.5mm AUX input on the front panel (2)  This input has its own AUX level control directly above the front 3.5mm jack.
For DAB/DAB+/FM radio reception, it is advised to connect a suitable antenna (or aerial) to the rear panel Ftype connector (24). Without this, radio reception will be very limited.
If a standard 24V trigger from an emergency panel is available, this may be connected to the 24V MUTE  contacts on the rear panel (23) which will mute output of all channels except for MIC/LINE 1 in an emergency.

Speaker outputs

V-series amplifiers can be used either as 100V line amplifiers or standard low impedance power amplifiers. These 2 cannot be used together, so it is important to decide which method will be used 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. Connect further speakers in parallel to the first speaker with all positive terminals and connected together and all negative terminals connected together as shown below.

A 100V line speaker system can comprise of multiple speakers wired in parallel. 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 up to 90% of the amplifier’s maximum output.
The terminals of a 100V speaker are connected via a small 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

Alternatively, each zone output of a V-series amplifier is capable of powering one or more low impedance speakers. The benefit this offers is to improve the sound quality using less expensive speakers. (100V speakers include the added cost of a transformer, which also effects the frequency response)
There is an option on each zone for either a 4Ω or 8Ω speaker output to determine the minimum impedance. It is essential to select the correct output terminal when opting for low impedance speakers.
For a single 8Ω speaker, connect the positive (+) wire to the “8Ω” terminal and the negative (-) wire to “COM” For a single 4Ω speaker or for 2 x 8Ω speakers connected in parallel, connect the positive (+) wire to the “4Ω” terminal and the negative (-) wire to “COM”
To drive multiple low impedance speakers from a single 4Ω or 8Ω output, these can be connected in series or parallel to achieve the correct impedance, which should be no less than 4Ω or 8Ω, depending which is used.
3 examples: 2 x 8Ω speakers wired in parallel will present 4Ω to the output.
2 x 8Ω speakers wired in series will present 16Ω to the output. 2 pairs of series-wired 8Ω speakers (i.e. 2 x 16Ω) wired in parallel will present 8Ω to the output.
Most importantly, check total the combined impedance on the speaker wire to the amplifier before connecting it to the output. It is important to ensure that the total combined speaker load is no less than 4Ω or 8Ω (depending which output is used) and that the power handling of the speakers is equal to or greater than the output power of the amplifier.
When all other connections are made, connect the rear IEC inlet (13) to the mains using the supplied mains lead (or an equivalent approved type).
Ensure the POWER (12) is switched off until all input and speaker connections are in place.

Operation

When all connections are made, turn down both MASTER controls (10) and switch on the power (12). The backlight on the media player display will light (1) confirming that power is on. Turn BASS and TREBLE controls (8, 9) to the 12 o’clock position (pointing straight up) and turn MASTER rotary controls up part way for testing.
To check the system using one of the mic/line inputs 1, 2 or 3, ensure a signal or microphone is connected and gradually increase the volume for that channel until the output is heard through the speakers. Turn up the MASTER control to the maximum required volume level and adjust the individual volume as required. LINE inputs A or B or the AUX input can also be used for the initial check, or even the internal MEDIA player.
When checking audio through LINE A, LINE B or Aux, ensure that its level control is not turned fully down. See below for further information about music playback source selection and operation of the media player.

LED indicators for each channel (11) show when the signal is present (-20dB) or at maximum (0dB). If the 0dB LED is lighting constantly rather than briefly on the loudest peaks in the sound, reduce the output level to where this lights only instantaneously to help avoid any damage to the system. If the amplifier detects overload or a fault, the amplifier will enter Protect mode and the PROT LED will light. If this happens, power the amp down, check the speaker wiring for faults and re-start after a few minutes. If the amplifier stays in Protect mode permanently, have the unit checked by a qualified service technician.
Once initial system checks are complete, repeat the process for any other mic/line/aux inputs, playing a signal through each and gradually increasing the volume for each to the required level (3, 4, 5).
Note: Mic/Line 1 input also has a PRIORITY switch (21), which when pressed in, overrides (mutes) output of the other channels when a signal is present on Mic/Line 1. If there is no sound from any other channels, it is worth checking if this button is pressed in, which could cause the other channels to mute.
Music playback is served by a rotary source selector (6) for each zone, which can switch between AUX, MEDIA, LINE A or LINE B. This offers each zone to be able to “hear” the same or different music playback (which can equally be any line level input type).
Selecting AUX, LINE A or LINE B will play any line level signal connected through that input into the MUSIC channel, governed by the MUSIC level control (7). Make sure the LINE input LEVEL controls (18) or AUX level (2) is turned up part way for checking. This can be increased to the required level after the initial test.
Likewise, if MEDIA is selected, then playback from any of the selectable media player modes will be played through the MUSIC channel. Please see below for further details of the media player operation. In addition to channel and MASTER volume controls, there are BASS and TREBLE EQ controls (8, 9) to adjust the tone of each amplifier output. At the 12 o’clock position, these controls are applying no effect to the signal (no boost or cut).
Moving the BASS control clockwise boosts the low frequencies in the audio, whilst moving it anticlockwise will cut these low frequencies. Likewise, moving the TREBLE control clockwise boosts the high frequencies in the audio, whilst moving it anticlockwise will cut these high frequencies. Adjust these EQ control to suit the type of audio signal or compensate for the room acoustics.

**Media player

** V-series amplifiers are fitted with a built-in media player (1) The media player has a Bluetooth receiver, USB/SD audio player and a DAB+ or FM radio tuner. Pressing the SOURCE select button will step through Bluetooth, SD, USB, DAB and FM tuner modes. Pressing the MUTE button for any source will mute the output. Holding the MUTE button powers down the media player and pressing it again powers it up again.

Settings menu
The media 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| Press **to step through settings and enter. Use**  / : to adjust values
---|---|---
<Time             >| <Set Time/Date >| DD-MM-YYYY… HH:MM
<Set 12/24 hour >| <Set 24 hour> / <Set 12 hour>