CM4-STUDIO - Blender Citronic - Free user manual and instructions

Product Type	Compact Mixer
Brand	Citronic
Model	CM4-STUDIO
Channels	4 (2 mono + 1 stereo pair)
Mono Inputs	2 x XLR/6.3mm jack (balanced/unbalanced)
Stereo Input	1 x 2x6.3mm jack + 2xRCA (unbalanced)
Phantom Power	+48V switchable
EQ per Channel	3-band: High 10kHz, Mid 700Hz, Low 50Hz, ±15dB
USB Audio Interface	USB type B, plug-and-play with PC/Mac
Main Outputs	L+R on 6.3mm jack (balanced/unbalanced)
Additional Outputs	AUX (6.3mm), REC (RCA), Phones (6.3mm stereo)
Power Supply	12Vac 1000mA adapter (included)
Dimensions (W x D x H)	190 x 230 x 60 mm
Weight	2.09 kg
Frequency Response	20Hz - 20kHz
Signal-to-Noise Ratio (Mic)	120dB E.I.N.
Signal-to-Noise Ratio (Line)	95dB E.I.N.
Cleaning	Soft cloth with neutral detergent; use soft brush for controls
Safety	No user-serviceable parts; refer to qualified service personnel

Frequently Asked Questions - CM4-STUDIO Citronic

How do I connect the CM4-STUDIO to my computer?

Use a USB A to B cable to connect the rear panel USB port to your computer. The mixer will be recognized as an external USB audio device. Select it as audio input/output in your recording software.

How to enable phantom power for condenser microphones?

Press the +48V switch on the control panel. This provides phantom power to the XLR inputs. Ensure the MAIN fader is turned down before engaging.

What type of microphones can I use with the mono inputs?

You can use both dynamic and condenser microphones. For condensers, enable phantom power. Use balanced XLR cables for best performance.

How do I adjust the equalization on a channel?

Each mono channel has 3-band EQ controls: HIGH (10kHz), MID (700Hz), and LOW (50Hz), each with ±15dB range. Adjust to shape the sound as desired.

Why is there no sound from the mixer?

Check the power adapter, ensure the power LED is on. Verify that input cables are connected properly, channel GAIN is turned up, channel fader and MAIN fader are not at zero. Also check that the output cables are connected to the amplifier or recorder.

How to use the AUX output?

The AUX output is controlled by each channel's AUX knob (pre-fader). Connect external monitoring or effects to the AUX output jack. Adjust the master AUX level on the top panel.

What is the channel INSERT used for?

The channel INSERT is a TRS 6.3mm jack that allows you to connect external processors (e.g., compressor, EQ) in-line. Use a stereo to dual mono cable: tip is return, ring is send, sleeve is ground.

How to record the mix from the REC output?

Connect the REC outputs (RCA) to your recording device. This provides an unbalanced line-level signal of the main mix.

Can I use the CM4-STUDIO with a guitar?

Yes, connect your guitar to a mono line input using a 6.3mm jack. The input is designed for line-level signals, so a DI box may be needed for passive pickups to avoid low gain.

What to do if the USB connection is not recognized?

Ensure the USB cable is fully inserted. Try a different USB port on your computer. Check that your operating system is compatible (Windows Vista/7/8/10, OS X onward). Restart the computer and mixer if needed.

USER MANUAL CM4-STUDIO Citronic

CM-series compact mixing consoles

CM4-LIVE (170.800) CM4-STUDIO (170.810)

CM6-LIVE (170.801)

CM8-LIVE (170.802) CM8-STUDIO (170.812)

CM10-LIVE (170.803)

User Manual

Front panel of a CMY0-UV8 audio recording device showing multiple audio channels and knobs (no readable text or symbols)

Features:

• 4 "LIVE" models with USB/SD player and delay effect
• 2 "STUDIO" models with USB audio input/output
• 3-band EQ per channel
• +48V phantom power
- 8 and 10 channel models are rack-mountable
• Channel inserts for mono inputs
- AUX feed from each channel

Introduction:

Thank you for choosing a Citronic CM series mixer. This product has been designed to offer reliable, high quality mixing for stage and/or studio applications with unfailing consistency. In order to gain the best results from this equipment and avoid damage through misuse, please read and follow these instructions and retain for future reference.

Warning:

To prevent the risk of fire or electric shock, do not expose any of the components to rain or moisture.

If liquids are spilled on the surface, stop using immediately, allow unit to dry out and have checked by qualified personnel before further use.

Avoid impact, extreme pressure or heavy vibration to the unit.

There are no user serviceable parts inside the mixer – refer all servicing to qualified service personnel.

Safety

• Check that the supplied adapter and connectors are in good condition and the mains supply voltage is correct.
• Ensure signal leads are of good condition without shorted connections (especially when using phantom power)
- Do not use the USB connector as a general purpose power source or charger.
• Do not allow any foreign particles to enter the console through connectors or control apertures

Placement

• Keep out of direct sunlight and away from heat sources.
• Keep away from damp or dusty environments.
• When rack-mounting, (CM8-LIVE, CM10-LIVE, CM8-STUDIO) use rack ears supplied, securing firmly.
• Ensure adequate access to controls and connections, including USB/SD player on rear panel (CM-LIVE)

Cleaning

• Use a soft cloth with a neutral detergent to clean the casing as required
• Use a soft brush to clear debris from the control surface
• Do not use strong solvents for cleaning the unit.

Control Panel

1. XLR MIC input
2. Channel INSERT - TRS 6.3mm jack
3. LINE input 6.3mm jack
4. Channel GAIN rotary
5. PAN (L-R balance) control
6. 3-band EQ (HIGH/MID/LOW) controls
7. Channel AUX output level
8. EFF rotary – internal delay or EFFECT out (CM-LIVE)
9. Channel volume fader
10. Channel PEAK LED
11. +48V phantom power switch
12. Stereo channel line input - 2 x 6.3mm jack
13. Stereo channel line input - 2 x RCA
14. REC output - record out on 2 x RCA
15. AUX output - 6.3mm jack
16. EFFECT output - 6.3mm jack (overrides Delay effect)
17. USB/SD player display (CM-LIVE)
18. PHONES output - stereo 6.3mm jack
19. USB/SD player transport controls (CM-LIVE)
20. Power LED
21. VU and CLIP LEDs for L + R output
22. DELAY and REPEAT controls (CM-LIVE)
23. PHONES output level
24. AUX output level
25. EFFECT output level (CM-LIVE)
26. MAIN fader - master volume control

Rear Panel

1. 12Vac power input (adapter supplied)
2. USB type B - output/monitoring input (CM-STUDIO only)
3. L + R main output (on top control panel for CM-STUDIO)
4. SD card slot (CM-LIVE only)
5. USB type A input (CM-LIVE only)

Connection

Before connecting to amplifier or other equipment, turn down all volume controls to avoid loud noises which may cause damage to other equipment. Always switch amplifier power on last in line with volume levels down.

Using good quality 6.3mm jack leads (balanced or unbalanced), connect L + R outputs from the mixer to the amplifier, recorder or whichever equipment is to receive the main mix output.

If phantom power is to be used, press the "+48V" switch in.

Connect microphones, DI boxes and other balanced low impedance audio inputs to the mono channels using a quality XLR lead.

Connect high impedance and line level signals to the mono inputs using a 6.3mm jack lead.

For the stereo channel, connect left and right line level signals via 6.3mm jack or RCA leads (unbalanced).

Channel inserts may be connected to individual processing equipment like EQ or compressors. These connections completely interrupt the signal flow and divert to the external processor before returning to the channel for volume adjustment via the channel fader. This requires a stereo to 2 x mono jack lead – the 2 mono ends are send and return connections, the stereo connection is wired as per below.

Recording equipment can be connected via the "REC" outputs using a twin RCA lead and the 6.3mm jack AUX output can be connected to monitoring or external processing equipment if required. Individual levels can be adjusted to the AUX output via the individual channel AUX controls.

For CM-LIVE models, if the internal delay effect is not required, a send can be connected from the "EFFECT" jack output to and external effect unit, whereby the EFF channel controls act as individual level controls to the EFFECT output (same as for AUX output)

With all faders down, connect the supplied AC adapter to the 12Vac input and to the mains supply (ensure correct supply voltage) – the power LED will illuminate (if phantom power is selected, this LED should light also)

Checking

Test each channel's gain level by making the loudest expected sound into it and increasing the GAIN control until the red PEAK LED starts to light. Then back the GAIN off slightly until the PEAK LED hardly lights at all.

Test the main mix output by increasing the MAIN fader and selected channel faders whilst making sound through the channel(s) - the L + R output LED ladders should begin to show the output as it varies up and down.

Connecting a pair of headphones to the PHONES stereo 6.3mm jack is a good way of checking the mix output, remembering to gradually increase the PHONES level control.

Turn down all faders and then switch power on to connected equipment (amplifier last in line) and increase volume levels. Gradually increase MAIN and channel faders again and the sound should be heard through the speakers or be indicated on the recording equipment.

Operation

Each channel has a 3-band EQ (LOW/MID/HIGH), which can be used to balance the mix of frequencies and emphasise certain aural characteristics in the signal. Adjust these as required, noting that and overall increase may require an equivalent reduction of the GAIN control to compensate (otherwise clipping may occur from EQ boost).

Use the PAN control to position the channel input either to the left or right side of the stereo field. This can be useful to help separate and define sounds within a mix but be aware that extreme settings can be counter-productive by removing the channel from certain listening positions.

Use the AUX control to feed the correct amount of the channel signal to the AUX output. This routing is “Pre-fader” and is independent from the channel fader setting.

For CM-LIVE models, there is an EFF control, which feeds a part of the signal to the internal delay effect. Overall controls for DELAY (time between repeats) and REPEAT (number of repeats) are on the right-hand side of the control surface - these can be adjusted as required. An EFFECT control adjusts the overall level of the delay effect.

If external effects are to be used, plugging a jack lead into the EFFECT output defeats the internal delay effect and acts as a mono line level "send" to the external effect unit. The output(s) from the external unit will need to be "returned" via a mono or stereo channel and added to the mix, whereby the channel fader takes the place of the overall EFFECT level control.

Channel faders should be used to adjust the individual levels in the mix and the MAIN fader is for overall level. Turn down amplifier levels when changing any connections or powering down the mixer to avoid speaker damage.

USB features

For the CM-LIVE models, The USB and SD card connection is for the internal media player, which can offer playback of compressed digital audio files through the stereo channel. When a USB pen drive or SD card with such files on is connected via the rear panel, the player recognises this and automatically begins playback through the stereo channel. The player status is indicated by a small backlit LCD screen, as shown below...

A. Indicates media type (music/audio)
B. Indicates Play status (Play / Pause)
C. File / Folder indication
D. Bit resolution of file
E. Media source (USB / SD card)
F. Elapsed / Total track time
G. Track name
H. Spectrum output display

Transport controls allow navigation through tracks on the memory device. These are outlined below...

For CM-STUDIO models, connecting a USB A to B lead from the rear panel USB connector to a USB port on a PC or Mac computer allows audio to be transferred between the mixer and computer. The PC or Mac will recognise the CM-STUDIO mixer as an external USB audio device and the mixer can be selected as an audio source within recording software and as an output to the mixer, received as a main mix return. The firmware offers plug-and-play compatibility with Windows XP/Vista/7 and OS/X onward.

SPECIFICATIONS
Model	CM4-LIVE	CM6-LIVE	CM8-LIVE	CM10-LIVE	CM4-STUDIO	CM8-STUDIO
(Stock Code)	(170.800)	(170.801)	(170.802)	(170.803)	(170.810)	(170.812)
Power Supply	12Vac 1000mA (included)
Phantom Power	Switchable +48V (XLR inputs)
Frequency Response	20Hz - 20kHz
Mic/Line inputs (bal/unbal)	2 x XLR/jack	4 x XLR/jack	6 x XLR/jack	8 x XLR/jack	2 x XLR/jack	6 x XLR/jack
Stereo Input (unbal)	6.3mm jack/RCA (-8 to +15dB / +13 to +60 parallel)
SNR: Mic Inputs	120dB E.I.N.
SNR: Line Inputs	95dB E.I.N.
SNR: Stereo Input	96dB E.I.N.
EQ: High	10kHz, ±15dB
EQ: Mid	700Hz, ±15dB
EQ: Low	50Hz, ±15dB
Outputs: Main (L + R)	6.3mm jack (+28dBu balanced / +22dBu unbalanced)
Aux, EFF, REC out	unbalanced 6.3mm jack (+22dBu)
Phones Output	+15dBu stereo 6.3mm jack
Dimensions (mm)	60 x 190 x 230	60 x 270 x 230	60 x 350 x 230	60 x 430 x 230	60 x 190 x 230	60 x 270 x 230
Weight	2.09kg	2.42kg	2.75kg	3.08kg	2.09kg	2.42kg

Troubleshooting

No power LED on control panel	Ensure power adapter is working and connected properly
	Ensure mains outlet voltage is as stated on adapter
Power LED is on but no other LEDs and no output	Check input signals and condition of connection leads
	Check jack is connected to input and not channel insert
	Check GAIN is not too low on channel input
	Check channel fader is not fully down
	Check MAIN fader is not fully down
	Disconnect channel insert (if used) and check for correct wiring
	For condenser mics, turn down MAIN fader and check phantom is on
Power light and output LEDs lighting but no output	Check output connections to amplifier or recorder
	Check amplifier or recorder levels are not turned fully down
USB/SD player will not play audio from media (CM-LIVE models only)	Press PLAY on transport controls
	Check memory device is connected properly (remove and re-insert)
	Check file types - standard compressed digital audio files required
	Check memory device works on a PC or Mac for standard playback
USB device not recognised by PC or Mac (CM-STUDIO models only)	Check version and/or updates for operating system
	Follow on-screen trouble-shooter or diagnostics in Windows or OS
	Check USB connection (disconnect then reconnect USB lead)
	Seek advice from your PC or Mac operating system provider
Output is very loud or distorted	Check level of input signal is not too high
	Reduce channel GAIN and EQ settings
	Reduce channel and MAIN faders levels
	Ensure Hi-Z line level input(s) not connected via XLR
	Check output levels of equipment connected via channel inserts
	Check AUX and EFFECT level controls and reduce if necessary
	Check for high gain recording of media files on USB/ SD (CM-LIVE)
	Check input gain level on recorder or recording software
Output is working but at very low level	Check input audio source level is not too low
	Ensure low impedance line or mic signal is not connected via jack
	Increase channel GAIN control and EQ settings if turned down
	Increase channel and MAIN faders levels
	Check output levels of equipment connected via channel inserts
	Check for quiet recording of media files on USB/ SD (CM-LIVE)
	Check input gain level on recorder or recording software
Feedback (loud squealing or howling from mics)	Face microphone away from speakers and monitors
	Reduce channel GAIN level and EQ level(s)
	Reduce AUX and/or EFFECT levels
	Reduce channel and/or MAIN fader levels

Note: for further troubleshooting, refer equipment to qualified service personnel for testing