Introduction
Thank you for choosing an Adastra ML mic/line mixer as part of your
sound reinforcement system.
This unit is designed to offer high quality, dependable service for
audio mixing and distribution.
Please read this manual to gain the best results from your product and
avoid damage through misuse.
Front Panel
2.
|
Aux 1 + Aux 2 Level controls
|
5.
|
L+R output meters
|
3.
|
Global Tone controls
|
6.
|
Power on/off switch and indicator
|
Rear Panel
| 8. |
24Vdc power contacts
|
13.
|
Mic/Line & Phantom Power DIP switches
|
| 9. |
Left + Right XLR balanced outputs
|
14.
|
Mic/Line channel 1 - 6 balanced XLR inputs
|
| 10. |
Mono 6.3mm unbalanced jack output
|
15.
|
CH.1 Override level control
|
| 11. |
RCA Recording outputs (L+R)
|
|
|
Connection
Ensure the Power (6) is switched off until all input and output
connections are in place.
Turn all rotary level controls (1,2,4) fully down (anti-clockwise) to
avoid loud noises when switching on.
Set the BASS and TREBLE Tone controls (3) to the vertical position
(zero)
Connect microphones to the balanced XLR inputs on the rear panel (14).
For microphone inputs, set the Mic/Line DIP switch (13) to “MIC”
Where condenser microphones are used which require phantom power, set
the PHANTOM DIP switch to “ON”
Alternatively, mono line inputs can be connected to any of the XLR
inputs by setting this DIP switch to “LINE”
Stereo line level sources can be connected to AUX1 and AUX2 RCA inputs
(12)
A recording output is provided on 2 RCA connectors (11), which is not
governed by the MASTER level (4)
This can be connected to recording equipment or be used as an additional
main output if required.
Main output is available via left and right balanced XLR sockets (9) and
mono unbalanced 6.3mm jack (10)
Use any or all of these outputs to connect to the amplifier(s) or active
speakers as required for the system.
Connect the rear IEC inlet (7) 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.
For mobile operation or away from mains supply, a 24Vdc input is
provided on screw terminals (8).
Make sure the power switch is turned off before connecting to a 24Vdc
power source and observe correct polarity before powering up the unit on
DC power.
Operation
Ensure that amplifier(s) or active speaker(s) are switched off before
powering up the ML622 mixer.
Switch on the power and the Power LED indicator should light (6)
Now switch on power to the amplifier or active speaker(s) and turn the
volume(s) up part way.
Turn up the MASTER volume control (4) half-way.
If connected, speak into a microphone whilst gradually turning up its
channel level control (1)
If no microphones are connected, play a line level signal into a channel
whilst gradually turning up its level.
The L+R output meters (5) should light up and the sound should be heard
through the connected speakers.
Increase the MASTER volume if required and set the channel level control
to the required volume.
Repeat the above steps for all connected inputs whilst balancing levels
between channels as required.
For the AUX inputs, a single rotary control for each (2) adjusts the
level of both left and right RCA inputs.
Sensible use of the output meters (5) 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 Tone controls (3) up or down can
help improve the sound quality.
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.
An CH.1 Override function can be set to suppress all other channels when
a signal is present on Mic/Line 1.
Speaking into a microphone connected to Mic/Line 1 will cause the
signals in all other channels to be reduced.
When Mic/Line 1 is silent, other inputs will resume normal volume level.
The amount by which this function mutes the other channels is set by a
rotary control (15) on the rear panel.
Turn down amplifiers or active speakers before powering down the ML622
mixer to avoid loud noises.
