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CSD-series
Compact Mixers with B/T and DSP
Item ref: 170.871UK
170.872UK
170.873UK
User Manual
Version 1.0
Caution: Please read this manual carefully before operating
Damage caused by misuse is not covered by the warranty
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CSD-series Mixers User Manual
Introduction
Thank you for choosing a Citronic CSD-series mixer as part of your professional sound system. This
product 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.
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.
Warning
To prevent the risk of fire or electric shock, do not expose any components to rain or moisture. If liquids
enter the housing, stop using immediately, allow the unit to dry out and have it 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
• Use the 5Vdc power adaptor supplied or equivalent.
• Avoid ingress of water or particles into any part of the housing. If liquids are spilled on
the console, stop using immediately, allow the unit to dry out and have checked by
qualified personnel before further use
Placement
• Keep the console out of direct sunlight and away from heat sources.
• Do not place heavy objects on top of the control surface
• Allow adequate space for airflow and keep the console away from damp or dust.
Cleaning
• Use a soft cloth with a neutral detergent to clean the housing as required.
• A soft brush can be used to clear debris from between controls without damaging them
• Do not use solvents for cleaning the unit.
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CSD-series Mixers User Manual
Console layout
Each CSD 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
1. 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
2. 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)
3. +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.
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CSD-series Mixers User Manual
Channel controls
4. HIGH EQ This control can boost or cut the high frequencies by ±15dB
(12 o’clock position is zero)
5. LO EQ This control can boost or cut the low frequencies by ±15dB
(12 o’clock position is zero)
6. FX This control regulates the amount of the channel signal that is fed to the DSP effects
section, varying the amount of effect
7. 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.
8. VOL “VOL” is short for Volume. Moving this control clockwise increases the level of the signal
to the output section.
9. 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
10. L/MONO Line level 6.3mm jack input.
Mono if connected alone or left side if right side input is connected.
11. RIGHT Line level 6.3mm jack input for right side of stereo input.
12. 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.
13. Level Sets the line input level to -10dB if pressed in or +4dB if not pressed in.
14. 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.
15. VOL “VOL” is short for Volume. Moving this control clockwise increases the level of the stereo
signal to the output section.
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CSD-series Mixers User Manual
AUX and B/T Wireless Receiver
CSD-series mixers have an additional stereo AUX input and B/T wireless section.
16. AUX IN 3.5mm stereo input for connecting mp3 player or smart phone.
17. B/T LED Flashes when B/T receiver is active and stays lit when paired.
Flashes slowly when a track is playing.
18. B/T on/off Press to enable or disable the B/T receiver
19. AUX VOL Volume control for AUX input
20. B/T VOL Volume control for B/T receiver
DSP Effects
CSD-series mixers each have an internal 24-bit DSP processor for audio
effects, as detailed on the DSP Table in the appendix of this manual.
21. 6-segment LED Indicates the overall input level to the DSP section
22. Program display Indicates selected program (see table in appendix)
23. TAP LED Flashes to show the current tap tempo timing
24. TAP TEMPO Tap the TAP button rhythmically more than twice to set a tempo for time effects.
In edit mode, press to adjust PARAMETER 2 settings.
25. PROGRAM Turn to change program and press in to confirm the program.
Press again to enter edit mode and turn to adjust PARAMETER 1.
Press again to confirm PARAMETER 1 setting
(press TAP to edit the PARAMETER 2 setting)
26. EFFECTS Overall volume control for DSP effects output
Press the encoder to confirm the selection, the display will stop flashing & selected program will be active.
Press the encoder again and a dot will appear in the display indicating PARAMETER 1.
Turning the encoder will change PARAMETER 1 for the selected program as detailed in the DSP Table on
the following page.
Pressing the TAP button (26) will switch to PARAMETER 2 and then turning the encoder will change
PARAMETER 2 for the selected program.
These parameter changes are stored for when the program is selected in future.
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CSD-series Mixers User Manual
Output Section
27. MAIN OUT L+R Left and Right main balanced line outputs via XLRM
connectors to be fed onto amplification or recording
equipment.
28. PHONES output Stereo 6.3mm jack output for headphone monitoring
29. VU Meters Left & Right LED main out level indicators.
30. PHONES Controls the volume of the main output to the PHONES socket
31. MAIN OUT Master level control for MAIN OUT L+R
Rear Panel
32. DC Power In 5.5 x 2.1mm DC jack to connect the supplied 5Vdc adaptor
33. POWER ON/OFF Power switch – press for power on, press again for power off
Setting Up
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 to
operate.
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)
A further stereo AUX input (16) is provided on 3.5mm jack for connecting a stereo line level audio source,
such as an mp3 player, smart phone, tablet or laptop. This is governed by the AUX VOL control (19)
If headphones are to be used for monitoring the main output, connect these to the PHONES 6.3mm
stereo jack (28) and turn the PHONES control (30) down fully before listening to the headphones,
gradually turning this control up to the required level to avoid damage to hearing. (this control is premaster fader, which means that it can also be used as an independent output)
Connect the MAIN OUT L + R XLR outputs (27) to the receiving amplifier or recording device.
Finally, connect the supplied 5Vdc plug-in adaptor to the EXT DC IN jack (32) on the rear panel and the
plug-top to a suitable mains outlet, ensuring the correct mains supply voltage.
Before switching power on, it is advised to turn all volume controls fully down to avoid any loud noises
through the connected speakers or recording equipment.
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CSD-series Mixers User Manual
Operation
Turn the MAIN OUT control (31) fully down and press in the POWER button (33) 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 (31, 30) up and listen whilst playing the signal (or speaking into the
microphone) and increasing its VOL control 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 or pickup hears its own output.
To adjust the tone characteristics of a Mic, Line or 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 the HIGH control clockwise from 12 o’clock boosts the high frequencies (treble) for a brighter
sound and turning it anticlockwise cuts them for a duller sound.
Turning the LOW control clockwise from 12 o’clock boosts the low frequencies (bass) for a thicker sound
and turning it anticlockwise cuts them for a thinner sound.
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 or BAL 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 DSP presets to a mic or instrument can create a spatial or rotating effect. To add the effect,
turn the EFFECTS VOL control up (26) and gradually increase the FX control (6) on the input channel.
There are 16 pre-set effect types including digital reverbs, delays and modulation effects.
Each effect has 2 adjustable parameters to enable you to tailor the effect as required.
Experimentation is advised to achieve the best results from this section.
See the previous “DSP Effects” section and appendix for details about the DSP effects.
If a smart phone or tablet is to be connected as a wireless audio source, press the B/T button (18) until
the B/T LED is flashing (17).
Search on the smart phone or tablet for a device called “Citronic” and select to connect for audio
playback. The B/T LED will stop flashing when connection is successful.
When a track is being, the B/T LED will flash slowly. Turn up the B/T VOL control (20) to hear the track
being played.
Pressing the B/T button again will disable the B/T receiver and the B/T LED will be off.
Turn down the MAIN OUT volume control before powering down to avoid loud noises through connected
equipment.
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CSD-series Mixers User Manual
Specifications
Model
CSD-4
CSD-6
CSD-8
Inputs
2 x combo XLR/jack
+ stereo jack
4 x combo XLR/jack
+ stereo jack
6 x combo XLR/jack
+ stereo jack
Power supply
5Vdc 1A (adaptor included)
Power consumption max.
5W
EQ: low
±15dB @ 80Hz
EQ: high
±15dB @ 12kHz
Phantom power
+48V individually switchable (XLR inputs only)
Effects
16 program DSP (24-bit sigma-delta, 40kHz)
Audio source
B/T wireless receiver
B/T wireless version
2.1 + EDR
Input impedance: mic
2k Ohms
Input impedance: instrument
1M Ohms
Input impedance: line
20k Ohms
Frequency response
20Hz - 20kHz (±0.5B)
THD +N
<0.03% @ 1kHz
Dynamic range
102dB
Crosstalk: stereo
92dB
Output
Left + Right balanced XLR
Output impedance
120 Ohms
Max. output level
3Vrms
Dimensions
171 x 166 x 66mm
224 x 166 x 66mm
274 x 166 x 66mm
Weight
0.92kg
1.19kg
1.46kg
Disposal: The “Crossed Wheelie Bin” symbol on the product means that the product is classed as Electrical or
Electronic equipment and should not be disposed with other household or commercial waste at the end of its useful life.
The goods must be disposed of according to your local council guidelines.
Errors and omissions excepted.
Copyright© 2019. AVSL Group Ltd.
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CSD-series Mixers User Manual
Appendix
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