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953.028UK User Manual 

Front panel 

 

 

 

 

 

 

 

 
 

 

 

Rear panel 

 

 

 

 

 

 

 

 

 

 

Connection  

 

Ensure the Power (15) is switched off until all input and output connections are in place. 

Turn all rotary level controls (5 - 10) and Master level (13) fully down (anti-clockwise) to avoid loud noises 

when switching on.  

 

Set the BASS and TREBLE Tone controls (11, 12) to the vertical position (zero)  

 

Channels 1, 2 and 3 can accept microphones or mono line level inputs, such as CD, TV or electronic keyboard. 
Connect the main microphone or line level signal to Mic/Line 1 input (28) on the rear panel via balanced XLR 

or 6.3mm jack.  

 

If a condenser mic is being used, connect via XLR, select Mic level and 20V Phantom power on via the channel 

1 DIP switches (27) 

 

Further mic or line level signals can be connected to inputs 2 and 3 (24, 26) in the same way as for channel 1 

Set the DIP switches for channels 2 and 3 (23, 25) to suit the input source. 

Connect stereo line level sources to AUX 1 and AUX 2 RCA inputs (21, 22). 

 

Outputs are available on L+R balanced XLR (18) for stereo operation and a single 6.3mm unbalanced jack 

(19) summed to mono. Record outputs on L+R RCA (20) are unaffected by the Master level control. 

 

1. 

3.5mm AUX input to media player 

  9. 

Aux line input 1 level control 

2. 

USB port 

10. 

Aux line input 2 level control 

3. 

Media player control panel 

11. 

Bass EQ boost/cut control 

4. 

Media player LCD display 

12. 

Treble EQ boost/cut control 

5. 

Media player level control 

13. 

Master output level control 

6. 

Mic/Line input 1 level control 

14. 

Output level LED indicators 

7. 

Mic/Line input 2 level control 

15. 

Power switch and indicator 

8. 

Mic/Line input 3 level control 

 

 

16.  IEC mains inlet and fuse holder 

24.  Input 3 balanced XLR/jack 

17.  24V emergency alarm contacts 

25.  Mic/Line and phantom switches Input 2 

18.  L+R XLR balanced outputs 

26.  Input 2 balanced XLR/jack 

19.  6.3mm jack mono unbalanced output 

27.  Mic/Line and phantom switches Input 1 

20.  Record output L+R RCA 

28.  Input 1 balanced XLR/jack 

21.  Aux 2 line input L+R RCA  

29.  Ch.1 override level 

22.  Aux 1 line input L+R RCA 

30.  BT antenna connector 

23.  Mic/Line and phantom switches Input 3  31.  FM tuner antenna F connector 

Summary of Contents for MM321

Page 1: ...1U Rack Mic Line Mixer with Bluetooth USB FM Tuner Item ref 953 028UK User Manual Version 4 0 Caution Please read this manual carefully before operating Damage caused by misuse is not covered by the warranty ...

Page 2: ... 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...

Page 3: ... Outputs are available on L R balanced XLR 18 for stereo operation and a single 6 3mm unbalanced jack 19 summed to mono Record outputs on L R RCA 20 are unaffected by the Master level control 1 3 5mm AUX input to media player 9 Aux line input 1 level control 2 USB port 10 Aux line input 2 level control 3 Media player control panel 11 Bass EQ boost cut control 4 Media player LCD display 12 Treble E...

Page 4: ... connected speakers Increase the Master output level if required and set the relevant channel level control to the required volume Repeat the above steps for all connected inputs whilst balancing the levels between channels as required For the AUX line inputs a single rotary control for each 9 10 adjusts the level of both left and right RCA inputs Channel 1 input also has an override function whic...

Page 5: ... Holding the Previous track or Next track buttons will adjust the output volume of the player down or up The Bluetooth name can be customized to enable identification of individual nearby amplifiers To customize the Bluetooth number press and hold the Play Pause button until adastra_0000 is displayed with one of the characters flashing Press Previous or Next buttons to edit the number and Play Pau...

Page 6: ... line inputs When other media player sources are selected this AUX input is muted Specifications Power supply 100 240Vac 50 60Hz Fuse T1AL Inputs 3 x XLR jack bal unbal mic line 2 x Aux L R RCA 3 5mm jack to media player Audio source Internal Bluetooth USB FM Aux player Outputs L R XLR Mono 6 3mm jack Record out RCA Emergency control 24V contacts mute all except channel 1 Phantom power 20V switcha...

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