Avsl Adastra DM25 User Manual Download Page 2

 

953.108UK, 953.109UK User Manual 

Introduction 

 

Thank you for choosing an Adastra DM-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 

AVIS 

RISQUE DE CHOC ELECTRIQUE NE PAS 

OUVRIR 

 

 

 

 

 

 

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 4-16

Ω

 and 100V terminals at the same time 

 

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 an appropriate shelf unit (e.g. 853.055UK) and ensure adequate support 

 

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 

Summary of Contents for Adastra DM25

Page 1: ...25 DM40 Compact 100V mixer amplifiers Item ref 953 108UK 953 109UK User Manual Version 1 1 Caution Please read this manual carefully before operating Damage caused by misuse is not covered by the warranty ...

Page 2: ...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 cas...

Page 3: ...ide which method will be used at the start Speaker connections are provided as spring terminals on the rear panel 13 14 15 Wiring is described for each type of speaker system on the following page Next to the speaker connections is a spring terminal for FM Antenna 16 This should be connected to the core of an antenna cable for good FM radio reception if required NOTE Do not connect a speaker outpu...

Page 4: ...wer of the system for the amplifier Low impedance systems The DM series amplifiers can alternatively provide an output for a single 4 16Ω speaker by connecting the 4 16Ω output 14 to the positive speaker connection and COM output 13 to the negative speaker connection It is important to ensure that the speaker load is no lower than 4Ω and that the power handling of the speaker is equal to or greate...

Page 5: ...the speakers and increase to the required level If play does not start automatically press the MODE button and or Play Pause button to check if the player is set to play from the required memory device Try Previous track and Next track buttons if the selected track is unable to play Otherwise check that the audio files are standard mp3 type Normal playback will read through all tracks on the stora...

Page 6: ... paired the smartphone or other device should connect automatically when in range of the DM series amplifier and when Bluetooth is enabled FM tuner Pressing the mode button until FM appears in the lower part of the display enters FM tuner mode The display will show the current radio frequency in MHz Note reception will be considerably better if an FM antenna is connected on the rear panel Press Pl...

Page 7: ...e USB player FM tuner and Bluetooth receiver Bluetooth version 2 1 Controls Treble Bass MP3 Aux Mic Microphone input 6 3mm jack unbalanced Line input 2 x RCA summed to mono Line output 2 x RCA Speaker outputs COM 100V and 4 16 Ohms spring terminals Antenna connection Spring terminal Dimensions 280 x 205 x 67mm Weight 1 34kg 1 74kg ...

Page 8: ...ontrols Check for quiet recording of media files on USB Feedback from microphone Face microphone away from speakers and monitors Turn down MIC volume control Amplifier overheating Ensure cooling vents are clear from debris and dust Check that 4Ω or 8Ω speakers are not connected to 100V terminals Ensure total 100V speaker wattage is lower than the amplifier rating Ensure that 100V and 4Ω or 8Ω spea...

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