Citronic CSM-4 mixer has been developed to provide a
wide range of facilities for professional and reliable sound
reinforcement. Please read and keep this manual to achieve the best
results from your purchase and avoid damage through misuse.
Console Layout
Each CSM compact mixing console has a bank of mono input channels which
can accept a balanced microphone input or switchable line/instrument
input. There is also a stereo input for playback devices or line level
instruments.
All preamps have studio grade, low noise architecture for the cleanest
possible path throughout the signal chain. Console layout is set out in
distinct sections to simplify operation.
The following pages of this manual are divided up into these stages to
explain the details and function of each control.
Channel Inputs
Channel inputs are provided as XLR or 6.3mm jack on combo sockets.
If an XLR is plugged in, this will be connected as low impedance
(microphone) level. If a 6.3mm plug is used, this will be connected as
either line or instrument level (switchable)
The connections for these inputs are assigned as follows.
Mic / Line / Instrument input
- Combo input Connect a balanced microphone via XLR connection or a
line level or instrument input via 6.3mm plug. An unbalanced XLR can be
connected provided that +48V phantom power is not used.
Wired as follows.
|
|
|
|
| Balanced |
Pin 1 = Ground |
Pin 2 = Signal + |
Pin 3 = Signal – |
| Unbalanced |
Pin 1 = Ground |
Pin 2 = Signal + |
Pin 3 = Ground |
IMPED switch Press this button in to set the input impedance to
instrument level or leave the button in the up position for a line level
input. (instrument level is usually for pickups, such as those on a guitar. Electronic keyboards usually produce a line
level output)
+48V phantom Press this button in to enable +48V phantom power to
the XLR and the LED indicator will light. This provides power to some
condenser microphones and DI boxes.
Do not use with unbalanced XLR connectors. This does not affect any
jack inputs.
Channel Controls
HIGH EQ This control can boost or cut the high frequencies by
±15dB
(12 o’clock position is zero)
LO EQ This control can boost or cut the low frequencies by ±15dB
(12 o’clock position is zero)
- FX This control regulates the amount of the channel signal that is
fed to the digital delay
effects section, varying the amount of delay effect (see Digital Delay
below)
- PAN “PAN” is short for Panoramic, meaning the position that the
signal appears in the stereo
field. Moving the control clockwise fades the signal over to the
right-hand output and
moving the control anticlockwise fades the signal over to the left-hand
output.
- VOL “VOL” is short for Volume. Moving this control clockwise
increases the level of the signal
to the output section.
- Peak LED The peak LED will light when the channel is overloaded.
Take care to only allow this to
happen very briefly on the loudest parts of the audio or not at all. If
this LED lights continually for any length of time, reduce the input level, channel
volume or EQ until it only lights momentarily.
Stereo input
- L/MONO Line level 6.3mm jack input.
Mono if connected alone or left side if right side input is connected.
RIGHT Line level 6.3mm jack input for right side of stereo input.
Peak LED The peak LED will light when the channel is overloaded.
Take care to only allow this to happen very briefly on the loudest parts of the
audio or not at all. If this LED lights continually for any length of
time, reduce the input level, channel volume or EQ until it only lights momentarily.
Level Sets the line input level to -10dB if pressed in or +4dB if
not pressed in.
BAL “BAL” is short for Balance, varying the ratio of left and right
sides of the stereo signal. Moving the control anticlockwise reduces the signal on the right side
or moving the control clockwise reduces the signal on the left side.
VOL “VOL” is short for Volume. Moving this control clockwise increases the level of the stereo signal to the output section.
Digital delay
The internal effects section comprises a digital delay, which adds fast
or slow fading repeats to the mono inputs with the amount of signal fed
to the effects section determined by the FX control on each channel.
This is useful for echo and slap-back effects for vocals and
instruments.
REP REP is short for Repeats, which controls the number of fading
echo
repeats and hence the duration of the effect.
DEL DEL is short for Delay, which controls the length of time
between each repeat, changing the nature of the effect from slap-back to echo.
LEVEL Controls the overall amount of delay effects mixed to the
main output.
Output Section
MAIN OUT Left and Right main balanced line outputs via XLRM connectors to be fed onto
amplification or recording equipment.
VU Meters Left & Right LED main out level indicators.
USB/BT Controls the level of the internal USB player or Bluetooth receiver to the main outputs
PHONES Controls the volume of the main output to the headphones socket.
MAIN OUT Master level control for MAIN OUT L+R
PHONES 6.3mm stereo headphones output jack
USB Port Connect a USB pen drive to this port for playback of stored
audio files or to record the main output in mp3 format to the USB device.
Display LCD display to show the mode and status of the USB/BT player
| Press this button to enter the player menu |
| Press this button to play or pause current track or select an option. |
| Press to navigate to previous track/option or hold for volume down |
| Press to navigate to next track/option or hold for volume up |
- Media control
Rear Panel
- EXT DC IN DC jack for supplied 5Vdc power adaptor
- POWER Power on/off button
Operation
Connect microphones to the Mic / Line / Instrument combo inputs (1) via
XLR, ensuring that the +48V button (3) is pressed in for any condenser
microphones or D.I. boxes that require phantom power.
For line or instrument inputs (such as electric guitar), connect these
via 6.3mm jack plug to the combo inputs (1), ensuring that the IMPED
button (2) is pressed in if it is a Hi-Z instrument.
(Hi-Z means high impedance, such as guitar pickups)
For stereo line level signals, such as CD or mp3 players, computer sound
cards or electronic keyboards, connect these via 6.3mm jack plug to the
stereo inputs (10, 11) or if the input device is mono, just connect to
the L/MONO input (10). If the output is too loud or quiet, it may be
necessary to press the +4/-10dB level switch (13) to the correct setting
for the input type.
If headphones are to be used for monitoring the main output, connect
these to the PHONES 6.3mm stereo jack (24) and turn the PHONES control
(22) down fully before listening through the headphones, gradually
turning this control up to the required level to avoid damage to
hearing.
(this control is pre-master fader, which means that it can also be used
as an independent output)
Finally, connect the MAIN OUT L + R XLR outputs (19) to the receiving
amplifier or recording device.
Connect the supplied 5Vdc plug-in adaptor to the EXT DC IN jack (28) on
the rear panel and the plug-top to a suitable mains outlet, ensuring the
correct mains supply voltage. Turn the MAIN OUT control (23) fully down
and press in the POWER button (29) on the rear panel and the LCD display
(26) will light.
Check the output of any channel by starting with its VOL (8, 15) and FX
(6) turned fully down.
HIGH and LOW EQ controls and the PAN control should all be set in the
mid position (12 o’clock).
Turn up the MAIN OUT or PHONES (23, 22) up and listen whilst playing the
signal (or speaking into the microphone) and increasing its VOL
gradually. Stop when the desired output level is reached.
Avoid aiming the microphone or instrument pickup towards the
loudspeaker(s), which can cause feedback, which is a loud whistling or
howling sound caused when a mic hears its own output.
To adjust the tone characteristics of a Mic / Line / Instrument input
signal, the high and low frequency content can be individually cut or
boosted using the HIGH and LOW EQ controls (4, 5)
Turning clockwise from 12 o’clock boosts the frequencies and turning
anticlockwise cuts them.
Use these controls to make dull sounds clearer or reduce the harsh
nature of some inputs.
Boosting these too much can increase the chance of feedback, whereas
cutting can sometimes help to reduce feedback, so experimentation is
often necessary.
Adjust the PAN control towards left or right as desired. It is sometimes
beneficial to bias individual channels to different sides of the stereo
field to give separation and allow more detail in the mix.
Adding some echo effect to a mic or instrument can give a sense of
dimension. To add the effect, turn the delay LEVEL control up (18) and
gradually increase the FX control (6) on the input channel.
Adjust REPEAT and DELAY controls (16, 17) to create the desired time
characteristics for the effect.
USB/BT Player
The CSM mixers have an inbuilt digital USB audio player section combined
with a Bluetooth receiver.
If no USB device is inserted, the display will state “NO DEVICE”
To step through the USB/BT player options, press the MENU button. Use
the and buttons to navigate the 5 options: BT (Bluetooth), MSC (Music),
REC (Record), PC and SYS (System).
(PC is not currently functional on the CSM mixers – this is for future
development)
USB Playback
To initiate playback of audio files from a USB pen drive, insert the pen
drive into the USB port (25).
Playback should start automatically. If not, press the Play/Pause button
or remove the USB drive and check that the files stored are either .mp3,
.wma, .ape or .flac format before re-inserting the drive.
During playback, the display will show the file name, elapsed time,
playback mode and track number.
Output to the main mix and/or headphones is controlled via the USB/BT
control (21).
To navigate through the tracks stored on the device, press the Previous
and Next buttons.
Press and hold the Previous or Next button to decrease or increase the
media player volume.
Press the Play/Pause button/to temporarily stop or resume the current
track.
Press the MENU button to see playback options for USB and use and
buttons to select an option.
PLAY MODE: Select All Play, One Device, One Play or Random and press/to
confirm.
All Play will play through all tracks stored on the USB drive and
repeat.
One Device will play all tracks stored in the current folder and repeat.
One Play will repeat the current track.
Random Play will play through all tracks on the USB drive in a random
order.
EQ Mode: Select Normal, Rock, Pop, Classic, Jazz or Country tone profile
and press / to confirm.
Disk Root: Select root of device or individual folders stored on the
device for playback
Delete File: Press / to delete the current file from the device
Bluetooth Mode
To connect a smart phone or tablet to the CSM mixer via Bluetooth,
firstly make sure no USB device is connected (USB takes priority over
Bluetooth) and press the MENU button. Use the and buttons to navigate to
BT (Bluetooth) and press / to select. The display will show Bluetooth
mode. Enable Bluetooth on the sending device and select to pair with a
device called “Citronic”.
Once paired and connected, the display will state “BLUETOOTH CONNECT”
and “BT PAUSE” if a track is stopped or “BT PLAY” if a track is playing.
The transport buttons /, and will control tracks on the sending device
as they would for a USB track.
Record Function
Insert a USB pen drive which is formatted to FAT32 in order to record
the main output onto it.
If there are any audio files already stored on the USB device, they will
begin to play automatically.
Press and hold the MENU button and this will enter the recording mode in
a paused state.
Press / to begin recording and / to pause or continue. Hold / to stop
and store the file.
The recording will be stored as an mp3 file named “FILE****.mp3”
where **** is the track number.
Each recorded file will be stored onto the USB media in a folder named
“JL_REC”.
System Menu
Backlight Press / to select “Backlight” and use and to choose the
time-out value for the display backlight - 10sec, 30sec, 1min, 5min,
10min or never. This is the time of no activity before the display
backlight automatically switches off and then will switch on again when
any button is pressed.
Contrast Press / to select “Contrast” and use and to choose the balance
of LCD to backlight.
This helps to set the optimum clarity of the display for reading.
