Citronic CDM8:4 USB DJ Mixer

Introduction

Thank you for purchasing the Citronic CDM8:4 USB Rackmount DJ Mixer. This product is intended to give long term, reliable service in normal usage. Please read these instructions before use to avoid incorrect operation and to help outline the functions and controls.

Maintenance

No user serviceable parts inside; refer all servicing issues to qualified service personnel. Clean with a lint-free dry or damp cloth. To replace the crossfader, disconnect mains and undo the 2 securing screws slightly, lift the crossfader and disconnect from the in-line connector (noting the correct orientation). Connect the new crossfader, reposition and secure with the 2 screws.

Packing Contents

• IEC Mains cable
• CDM8:4 USB 19" DJ Mixer
• Instruction Manual

Controls

Microphone Section

Description of the front panel microphone controls:

• 1. MICROPHONE: Combo XLR and 6.3mm jack inputs for DJ mic and 2 Vocal mics.
• 2. Hi EQ: High frequency cut/boost for mic inputs.
• 3. Lo EQ: Low frequency cut/boost for mic inputs.
• 4. ON AIR: Switches on or mutes DJ Mic.
• 5. MANUAL OVERRIDE: Reduces music level to allow DJ mic talk-over.
• 6. DELAY: Delay effect level for Vocal mics 1 + 2.
• 7. TIME: Time setting for vocal delay effect.
• 8. MIC LEVELS: Individual level for DJ mic and 2 vocal mics.

The front panel features a dedicated microphone section with inputs for DJ MIC, VOCAL 1, and VOCAL 2. Each microphone input has associated controls for Hi EQ, Lo EQ, and individual MIC LEVELS. An ON AIR switch and a MANUAL OVERRIDE control are also present for the DJ microphone.

Stereo Section

Description of the front panel stereo channel controls:

• 9. CH.1 PHONO/LINE: Input selector for channel 1, turntable or line input.
• 10. CH.2 CD/LINE: Input selector for channel 2, CD player or line input.
• 11. CH.3 CD/USB1/LINE: Input selector for channel 3, USB, CD player or line input.
• 12. CH.4 PHONO/USB2/LINE/MP3: Input selector for channel 4, USB, turntable or line/MP3 player.
• 13. MP3 IN: 3.5mm stereo jack socket for personal MP3 player or other portable source.
• 14. MP3 - LINE: Slide switch to select MP3 input or rear panel line input for channel 4.
• 15. GAIN: Individual gain controls for each stereo channel for matching input levels.
• 16. Hi EQ: High frequency cut/boost for each stereo channel.
• 17. Mid EQ: Middle frequency cut/boost for each stereo channel.
• 18. Lo EQ: Low frequency cut/boost for each stereo channel.
• 19. Fader: Individual volume fader for each stereo channel.
• 20. CUE: Routes channel to meters and headphones for monitoring and cueing tracks.
• 21. DEFEAT: Disables crossfader control over stereo channels.
• 22. FADER START: Activates fader start for the channel assigned to the left side of the crossfader.
• 23. ASSIGN: Selects channel 1, 2, 3 or 4 for the left side of the crossfader.
• 24. Crossfader: Allows seamless fading between 2 assigned channels.
• 25. ASSIGN: Selects channel 1, 2, 3 or 4 for the right side of the crossfader.
• 26. FADER START: Activates fader start for the channel assigned to the right side of the crossfader.

The mixer features four stereo channels (CH1-CH4), each with input selection (PHONO/LINE, CD/LINE, CD/USB/LINE, PHONO/USB/LINE/MP3), GAIN control, Hi, Mid, and Lo EQ controls, a channel FADER, and a CUE button. A dedicated MP3 IN socket is available. The crossfader section includes ASSIGN buttons for each side, DEFEAT switch, and FADER START buttons.

Master Section

Description of the front panel master section controls:

• 27. VU Meters: Dual 10-segment LED volume meters.
• 28. LEVEL: Master volume level rotary control.
• 29. CUE MIX: Varies headphone signal between cue selected channel(s) and main programme output.
• 30. 12V LIGHT: BNC connector providing 12Vdc for console light up to 5W output.
• 31. POWER: Main power switch and LED indicator.
• 32. BOOTH LEVEL: Level control for BOOTH OUTs.
• 33. HEADPHONES LEVEL: Headphone volume control.
• 34. HEADPHONES: 6.3mm stereo jack socket for headphones output.

The master section includes VU meters for monitoring output levels, a MASTER LEVEL rotary control, CUE MIX control, BOOTH LEVEL control, and HEADPHONES LEVEL control. A 12V LIGHT BNC connector and the POWER switch are also located here.

Rear Panel Connections

Description of the rear panel connections:

• 35. Mains inlet: IEC connector to connect to mains using the supplied lead.
• 36. Fuse Holder: 20mm mains fuse holder (replace with same type and rating).
• 37. RETURN L+R: 6.3mm jacks for connecting external processors; output overrides internal delay effect for Vocal mics 1 + 2.
• 38. SEND: Mono 6.3mm jack to connect to the input of external processors, sending the effect mix from Vocal mics 1 + 2.
• 39. OUTPUTS BALANCED: Balanced XLR L + R main mix outputs.
• 40. OUTPUTS UNBALANCED: Unbalanced RCA main mix outputs.
• 41. BOOTH OUT: RCA outputs governed by BOOTH LEVEL control.
• 42. REC OUT: High frequency cut/boost for each stereo channel.
• 43. CHANNEL 4 LINE: RCA L+R inputs for line level source (CD, DVD, MP3, PC etc.). This input is switchable with the top panel 3.5mm stereo MP3 input.
• 44. CHANNEL 4 PHONO: RCA L+R phono inputs for turntable.
• 45. CHANNEL 3 LINE: RCA L+R inputs for line level source (CD, DVD, MP3, PC etc.).
• 46. CHANNEL 3 CD: RCA L+R inputs for CD player (or other line level source).
• 47. Ground (earth): Screw terminal for grounding equipment to the case of the CDM8:4 USB. Attach turntable ground spade connectors here.
• 48. CHANNEL 2 LINE: RCA L+R inputs for line level source (CD, DVD, MP3, PC etc.).
• 49. CHANNEL 2 CD: RCA L+R inputs for CD player (or other line level source).
• 50. CHANNEL 1 LINE: RCA L+R inputs for line level source (CD, DVD, MP3, PC etc.).
• 51. CHANNEL 1 PHONO: RCA L+R phono inputs for turntable.
• 52. REMOTE STARTS: 3.5mm mono jack outputs sending “start” trigger signals from channel faders 1 to 4 to start play on compatible CD players automatically when the fader is moved upward from the lowest point.
• 53. USB IN/OUT: USB B Input/Output for Channel 4.
• 54. USB IN/OUT: USB B Input/Output for Channel 3.

The rear panel features AC POWER IN, a FUSE HOLDER, EXTERNAL FX LOOP SEND/RETURN jacks, BALANCED and UNBALANCED main OUTPUTS, BOOTH OUT, and REC OUT. It also includes RCA inputs for each of the four channels (LINE, PHONO, CD, MP3), a ground terminal, and USB B ports for channels 3 and 4.

Connection Guide

This section illustrates a typical setup for the CDM8:4 USB mixer. It shows connections for a PC/Mac, DJ Microphone, Vocal Microphones, and MP3 players to the mixer's inputs. The mixer's outputs are shown connected to an amplifier and active monitors. Additionally, connections for turntables, CD players, and other audio sources to the mixer's various channel inputs are depicted.

Operation

Follow these steps for connecting and operating the Citronic CDM8:4 USB mixer:

• Check mains for correct voltage as indicated near to the IEC mains inlet on the rear panel.
• Connect to mains supply using the IEC cable provided.
• Connect the Main unbalanced RCA and/or balanced XLR outputs to the main PA and ensure that the volume levels are turned down to avoid damage.
• Connect the BOOTH outputs to powered booth monitors or separate PA zone.
• Connect any turntables to the RCA PHONO inputs on ch.1 and ch.2.
• Earth turntables to the case grounding point on the rear panel.
• Connect CD players or other line output sources to the CD inputs.
• Connect CD, CD+G, laptop, TV decoder, DVD or MP3 players to LINE inputs.
• Connect DJ mic and Vocal mics 1 + 2 to the top panel jack/XLR combo sockets.
• If required, connect personal MP3 player to top panel 3.5mm input.
• Connect headphones to the HEADPHONE jack.
• With MASTER LEVEL down, switch the power on.
• Ensure microphone levels are turned down.
• Gradually increase MASTER LEVEL and channel levels to check input signals.
• Be aware that the CROSSFADER also operates across assigned channels - this can be bypassed by pressing DEFEAT.
• To use the crossfader, select channels using the ASSIGN levers, ensure DEFEAT is off, and the crossfader will then seamlessly blend between these 2 channels.
• Gradually increase microphone channel levels to check microphone signals.
• Monitor each stereo channel via headphones by selecting using the CUE switches.
• Whilst a channel is on CUE, adjust the GAIN so that LED meters show a full signal without showing “in the red" (overload).
• Adjust Hi, Mid and Lo EQ settings to the desired tonal effect.
• When using the DJ mic, push the ON AIR switch and if required, push MANUAL OVERRIDE to drop the music level by a fixed amount whilst talking.
• Adjust Hi and Lo EQ and DJ MIC level settings to suit.
• For singers and karaoke, increase the levels of Vocal mics 1 + 2 and adjust Hi and Lo EQ settings to suit.
• For each vocal mic, adjust DELAY level to the desired amount; variation in the time between delay repeats can be adjusted via the TIME rotary.
• Should a different effect (e.g., Reverb, compression, DSP) be required, connecting SEND on the rear panel to an external processor's input and the processor's output(s) to the rear panel RETURNS will serve as an effects loop, overriding the internal delay effect. The DELAY controls will now act as an external effects mix.
• When not being used, turn down the Vocal mic levels to avoid unwanted noise.

Troubleshooting

NO OUTPUT

• Check mains power is on.
• Check leads and connections.
• Check MASTER LEVEL and mic or channel fader is turned up.
• Check CROSSFADER by trying the DEFEAT switch.

DISTORTED OUTPUT

• Check line input isn't connected to PHONO.
• Check channel and MASTER faders are not too high.
• Check volume control of amplifier, active speakers or recording equipment.

MICROPHONE FEEDBACK

• Eliminate "line-of-sight" between mic(s) and speakers.
• Check DELAY is not set too high.
• Adjust Hi or Lo EQ and/or level controls.

MICROPHONE OUTPUT

• No output – check if mic switched off.
• No output – check if phantom power source is required.
• Low output – ensure mic is not switched to “pad” or “Hi Z”.
• Quiet vocals – ask singer to sing closer to mic.

DELAY EFFECT

• Metallic effect but no delay – increase TIME control to produce more natural echo.
• No delay effect – increase DELAY controls, check nothing is plugged into RETURNS.

TOO QUIET

• Check turntable is not connected to line input.
• Check channel and MASTER faders are not too low.
• Check for volume control on sound source.

Specifications

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© 2021. AVSL Group Ltd. Unit 2-4 Bridgewater Park, Taylor Rd. Manchester. M41 7JQ. AVSL (EUROPE) Ltd, Unit 3D North Point House, North Point Business Park, New Mallow Road, Cork, Ireland.