CAD MXU4-FX

Precautions

WARNING! Always follow basic precautions to avoid serious injury or death from electrical shock, short-circuiting, damage, fire, or other hazards.

• Do not open: This device contains no user-serviceable parts. Do not open or modify the device. If malfunctioning, discontinue use and have it inspected by qualified service personnel.
• Water warning: Do not expose to rain, use near water, or in damp/wet conditions. Do not place liquid containers on the device. If liquid seeps in, turn off power immediately, disconnect the USB cable, and have it inspected. Never insert or remove USB cables with wet hands.
• Fire warning: Do not place burning items on the unit.
• If you notice any abnormality: Immediately turn off power, disconnect the USB cable, and have the device inspected if the USB cable is frayed/damaged, if unusual smells or smoke are emitted, if an object has been dropped into the device, or if there is a sudden loss of sound.

CAUTION Always follow basic precautions to avoid physical injury or damage to the device or property.

• Location: Do not place in unstable positions or locations with corrosive gasses/salt air. Remove all cables before moving.
• Connections: Turn off power for all devices before connecting. Set all volume levels to minimum before turning power on/off.
• Maintenance: Remove the USB cable from a computer when cleaning.
• Handling caution: Do not insert fingers into gaps. Avoid inserting foreign objects. Turn off power and disconnect USB if foreign objects are inserted. Do not rest weight on the device or use excessive force. Avoid prolonged listening at high volumes to prevent hearing loss.

CAD Audio cannot be held responsible for damage caused by improper use, modifications, or lost data.

Notice

To avoid malfunction/damage to the product, data, or property, follow the notices below.

Handling and maintenance

• Do not use near TVs, radios, stereo equipment, or mobile phones to prevent noise generation.
• Do not expose to excessive dust, vibration, extreme cold, or heat to prevent panel disfiguration or internal damage.
• Do not place vinyl, plastic, or rubber objects on the device, as this may discolor the panel.
• Clean with a dry, soft cloth only. Do not use paint thinners, solvents, or chemical-impregnated cloths.
• Allow the device to dry for several hours if condensation may have occurred due to rapid temperature changes before turning on the power.
• Avoid setting equalizer controls and faders to their maximum to prevent feedback and speaker damage.
• Do not apply oil or grease to faders, as this may cause contact problems.
• When powering an audio system, turn the power amplifier LAST when powering ON, and turn it OFF FIRST when powering OFF, to avoid speaker damage.
• Turn the device off if it will not be used for an extended period.

Connectors

XLR-type connectors are wired as follows (IEC60268 standard): pin 1: ground, pin 2: hot (+), pin 3: cold (-).

Information about this manual

• Illustrations are for instructional purposes only.
• Company and product names are trademarks or registered trademarks of their respective companies.

Connecting the Mixer

This section describes how to connect various audio devices to the MXU4-FX mixer.

Diagram Description: The diagram shows connections for a computer (via USB), headphones (to the front panel headphone jack), an electric keyboard (to CH3/4 LINE inputs), an electric guitar (to CH1/CH2 MIC/LINE inputs), microphones (to CH1/CH2 MIC/LINE inputs), a smartphone (via USB), a headset with microphone (to the headset input), and main output speakers (to the rear panel MAIN L/R output jacks).

Product Overview

The CAD MXU4-FX is a multipurpose 4-Channel analog mixer featuring a built-in USB interface and digital effects processor. It offers 2 mic/line inputs, 2 mono/1 stereo line inputs, on-board 2-band EQ, and +48V phantom power. It is an ideal compact option for live performance, broadcasting, podcasting, or home recording.

Features:

• USB output connects to a computer for recording or podcasting.
• USB input for playing MP3/WAV files from a flash drive.
• +48V phantom power for condenser microphones.
• 2-band EQ per channel.
• Built-in effects processor with 88 presets for chorus, delay, reverb, and more.

Mixer Basics: Where Your Sound Goes

The signal flow involves inputting sound from a microphone or instrument, adjusting volume, tone, and effects for each channel, the combined sound flowing to the output, final volume adjustment, and outputting to speakers or headphones. Note: Turn on the +48V phantom power supply when using a condenser microphone.

Basic Operation: Power Connection

1. Ensure all switches on the device are off and the USB data line is not inserted.
2. Connect the attached USB data line: Align the USB data cable plug with the device back panel interface and insert it.
3. Connect the USB data cable to the USB power adapter.
4. Plug the power adapter into a standard AC power socket [~AC 100-240 50Hz/60Hz].

Rear Panel: Features a USB POWER input (5V DC).

Controls and Functions

• 1. Type-C power input socket: Used to connect the USB power adapter and Type-C data cable for power supply. Requires a USB power adapter with 4.8V-5.2V output voltage and 3A or higher current.
• PC/DC Switch: Toggles between connection modes. Pull to 'PC' to transfer signal between the computer and the console.
• 2. Mic/Line: XLR/phone jacks for connecting microphones, instruments, or audio devices.
• 3. Headset/Microphone (1) input jack: For connecting a headset microphone; audio input is set to channel 1.
• Headset/Headphones () output jack: For connecting headset headphones; outputs the same sound as the main headphones output.
• 4. Peak LED: Lights when input volume is too high. Turn the GAIN knob (5) left if lit.
• 5. GAIN: Determines the basic volume for channel 1. Adjust so the PEAK LED (4) flashes briefly at the loudest moments.
• 6. EQ: Use HIGH/LOW knobs to adjust sound quality. Set to "0" (flat) if no adjustment is needed.
• 7. EFFECT: Buttons to engage effects, adding natural spaciousness. Default settings have reverb turned off.
• 8. LEVEL: Adjusts the level of the channel signal. Minimize noise by adjusting unused channel knobs to a minimum.
• 9. EFFECT LEVEL: Adjusts the effect level sent from the internal effector to the bus.
• 10. MAIN OUT: Adjusts the signal level output to the MAIN OUT jack.
• 11. Level Meter LED: Shows the output signal level in six levels (e.g., +10, 0, -15 dB). If the PEAK light glows red, turn the MAIN L/R LEVEL knob left to lower the volume.
• 12. DISPLAY / MODE / PROGRAM:
  • A. DISPLAY: Shows function, running status, song time/number, and effect types.
  • Effect Types: AMBIENCE (01-03), SPRING (04-06), ROOM (07-14), PLATE (15-22), HALL (23-30), ECHO (31-42), PING PONG (43-46), SLAP REV (47-50), ECHO+REV (51-58), CHORUS (59-64), FLANGER (65-70), DELAY+CHORUS (71-76), REV+CHORUS (77-82), KTV (83-88).
• B. MODE: Used to switch between Function, Playback, and Effect modes.
• C. PROGRAM: Used to select features, play/pause/song, or select effect categories. Rotate to select track/effect, press to confirm.
• Operation of Playback and Effects Functions:
  • Function Mode (USB connected): Select Record, Continuous Playback, Random Playback, or Loop. Use Program knob. Long press Mode button to begin/end recording.
  • Playback Mode (USB connected): Play recorded media from the USB device. Use Program knob to select or change tracks.
  • Effects Function: Add digital effects to vocals/music. Use Program knob to toggle between 88 effects. The EFF button must be engaged to add effects.
• 13. USB: Connects to USB flash drives (supports MP3, WAV, WMA, FLAC) or as a USB audio device. USB DISK light indicates flash drive connection; USB OTG light indicates computer connection.
• 14. USB/LINE: Switches input signals on channel 3/4. Press for USB input, turn off for LINE input.
• 15. PHANTOM/+48V LED: Supplies +48V phantom power to the XLR plug on MIC/LINE input jack (3) when the switch is turned on. Use for condenser microphones.
• 16. LINE: For connecting line-level devices like electric keyboards or audio devices. Uses the [L/MONO] jack. Disabled when the [GUITAR/LINE] SWITCH (14) is on.
• 17. MAIN OUT: Balanced TRS output jacks that output the mixed stereo signal, adjusted by the MAIN L/R fader. Connect to the power amplifier for main speakers.
• 18. PHONES: Headphone jack supporting stereo phone plugs. Use an adapter for mini plugs.
• PHONE KNOB: Adjusts the volume to headphones and powered monitor speakers connected to the headphone output jack.

Specifications

Warranty and Support

Two-Year Limited Warranty

CAD Audio warrants this product to be free of defects in material and workmanship for two years from the date of purchase. CAD Audio will, at its option, repair or replace the unit. This warranty excludes exterior finish, abuse, misuse, or unauthorized repair. Please retain proof of purchase for warranty claims.

Initiating a Warranty Claim: Contact American Music and Sound at 1-800-431-2609 to obtain a return authorization number and shipping instructions. Returns without a pre-approved number will be refused. Use adequate padding for shipping and retain your tracking number.

Contact Information:

CAD Audio
6573 Cochran Rd., Bldg. I Solon, OH 44139 U.S.A.
Tel: (440) 349-4900 Fax: (440) 248-4904
Sales: 800-762-9266 cadaudio.com

Distributed Worldwide by American Music and Sound
925 Broadbeck Drive, Suite 220
Newbury Park, CA 91320 U.S.A.
Tel: (800) 431-2609 Fax: (800) 431-3129

©2022 CAD Audio Rev00 0522