MM321 Rack Mixer With Bluetooth & USB/FM Player
Adastra MM321 mic/line mixer with built-in
media player as part of your sound reinforcement system.
This unit is designed to offer high quality, dependable service for
audio mixing and distribution.
Front Panel
1. 3.5mm AUX input to media player
2. USB port
3. Media player control panel
4. Media player LCD display
5. Media player level control
6. Mic/Line input 1 level control
7. Mic/Line input 2 level control
8. Mic/Line input 3 level control
9. Aux line input 1 level control
10. Aux line input 2 level control
11. Bass EQ boost/cut control
12. Treble EQ boost/cut control
13. Master output level control
14. Output level LED indicators
15. Power switch and indicator
Rear Panel
16. IEC mains inlet and fuse holder
17. 24V emergency alarm contacts
18. L+R XLR balanced outputs
19. 6.3mm jack mono unbalanced output
20. Record output L+R RCA
21. Aux 2 line input L+R RCA
22. Aux 1 line input L+R RCA
23. Mic/Line and phantom switches Input 3
24. Input 3 balanced XLR/jack
25. Mic/Line and phantom switches Input 2
26. Input 2 balanced XLR/jack
27. Mic/Line and phantom switches Input 1
28. Input 1 balanced XLR/jack
29. Ch.1 override level
30. BT antenna connector
31. FM tuner antenna F connector
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.
For the FM tuner to function correctly, it is advisable to connect an FM
aerial to the F type antenna connector (30)
If available, connect a 24V trigger from an alarm panel to the alarm
contacts (17) to mute all except channel 1 in an emergency.
(The 24V contacts can be connected with either polarity +/- or -/+ to
operate)
Connect the rear IEC inlet (16) to the mains using the supplied mains
lead (or an equivalent approved type).
Ensure that the supply voltage is correct for this equipment and that
the mains outlet is switched on.
Operation
Ensure that amplifier(s) or active speaker(s) are switched off before
powering up the MM321 mixer.
Switch on the power and the Power LED indicator should light (15)
Switch on power to the amplifier or active speaker(s) and turn volume(s)
up part way. Turn up the MM321 Master level (13) half-way.
If connected, speak into a microphone whilst gradually turning up its
channel level control (6, 7 or 8)
If no microphones are connected, a line input or internal media player
(see below) can be used for checking.
The L+R output meters (14) should light up and the sound should be heard
through the 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 which attenuates all other
channels when there is a signal on Ch.1
Turning the CH.1 Override Level control clockwise increases the amount
that it mutes all other channels.
Sensible use of the output meters (14) will help to avoid overdriving
the outputs and/or connected amplifiers.
The +10dB LED should only light briefly on percussive or transient parts
of the sound (i.e. bass drum)
If the +10dB LED is lit for any longer than short bursts, the level
controls will need to be turned down.
This will avoid signal clipping and overdrive, which can be damaging to
equipment connected to the outputs.
For overall tone adjustment, moving the BASS and TREBLE EQ controls (11,
12) can help to tailor the sound quality as required.
If the sound is too thin sounding, turn up the BASS rotary. If it is too
deep sounding, reduce the BASS level.
If the sound is not very clear, turn up the TREBLE rotary. If it is too
harsh sounding, reduce the TREBLE level.
Media Player
| SOURCE |
|
|
|
REPEAT |
| bt = BT |
Previous track |
Play/Pause current track |
Next track |
ONE = repeat track |
| LOAD = loading USB |
Hold = volume down |
FM mode = Auto tune |
Hold = volume up |
rND = random play |
| MHz = FM frequency |
|
In AUX mode = Mute |
|
ALL = repeat all |
| AUX = Aux line input |
|
|
|
|
The MM321 built-in media player can play standard compressed audio files
stored on a USB memory device (formatted to FAT32)
Insert the USB device into the USB port (2) to start playback using
PREVIOUS, PLAY/PAUSE, NEXT & REPEAT controls.
The media player can also playback audio from a smart phone or tablet
via B/T wireless connection.
Ensure the supplied B/T antenna is connected on the rear panel (31)
To pair a device to the MM3260, press the SOURCE button until “bt”
appears in the LCD display.
On the smart phone or tablet, search for the device called “adastra” and
select to pair and connect.
Once connected, playback from the device can be navigated by the
PREVIOUS, PLAY/PAUSE and NEXT buttons.
For FM tuner mode, press SOURCE until a frequency (in MHz) is displayed.
Press and hold PLAY/PAUSE to auto tune available stations
(pressing PLAY/PAUSE during this process will abort the auto-tuning) Use
the PREVIOUS and NEXT buttons to navigate through the stored stations.
To delete any selected station, press and hold the Repeat button. Repeat
the auto tuning process to re-populate any missing presets.
Connecting an external device to the 3.5mm AUX jack socket (1) allows
playback of stereo line level audio through the media player.
All media player output is controlled by the MEDIA level control (5) on
the front panel.
Turn down amplifiers or active speakers before powering down the MM321
mixer to avoid loud noises.
