Gochanmi SOKC F4 4-Channel Audio Mixer Instruction Manual

1. Introduction

Thank you for choosing the Gochanmi SOKC F4 4-Channel Audio Mixer. This compact and versatile mixing console is designed to provide high-quality audio processing for various applications, including home music production, live webcasting, and K-song performances. It features 4 input channels, Bluetooth connectivity, USB recording capabilities, 48V phantom power for condenser microphones, and integrated DSP multi-effects.

This manual provides detailed instructions for setting up, operating, and maintaining your SOKC F4 mixer to ensure optimal performance and longevity. Please read this manual thoroughly before using the device.

2. Safety Information

WARNING: To reduce the risk of fire or electric shock, do not expose this equipment to rain or moisture. Do not remove the cover (or back). No user-serviceable parts inside. Refer servicing to qualified service personnel.

Always ensure the power supply is disconnected before making any connections or disconnections to prevent damage to the unit or other equipment.

Image: Rear panel of the mixer with power input and safety warnings.

3. Product Overview

The Gochanmi SOKC F4 mixer features a user-friendly layout with clearly labeled controls for easy operation. Below is an overview of the main components and their functions.

Image: Top-down view of the Gochanmi SOKC F4 mixer.

3.1 Input Section

• MIC Inputs (XLR/1/4" Combo): Connect microphones or line-level instruments.
• LINE Inputs (1/4"): Connect line-level sources such as keyboards or guitars.
• INSERT: For connecting external effects processors to individual channels.
• GAIN Control: Adjusts the input sensitivity for each channel.

3.2 Equalization (EQ) Section

• HIGH: Adjusts the high-frequency range (treble).
• MID: Adjusts the mid-frequency range.
• LOW: Adjusts the low-frequency range (bass).

3.3 Effects and Auxiliary Section

• FX/SEND: Controls the amount of signal sent to the internal effects processor or an external auxiliary device.
• AUX: Auxiliary send control.
• DELAY/REPEAT: Controls for the built-in digital effects.

3.4 Master Section

• MAIN Output (L/R): Connects to main speakers or recording devices.
• PHONE Output: Headphone jack for monitoring.
• USB Interface: For connecting to a computer for recording or playback, and for USB flash drive playback.
• +48V PHANTOM Power: Button to activate phantom power for condenser microphones.
• LEVEL Faders: Individual channel volume controls and master volume fader.

Image: Detailed view of input and EQ controls.

Image: Detailed view of main output, USB, and effects section.

4. Setup

4.1 Power Connection

1. Ensure the mixer's power switch is in the OFF position.
2. Connect the provided power adapter cable to the AC-IN port on the rear panel of the mixer.
3. Plug the power adapter into a suitable electrical outlet.

4.2 Connecting Audio Sources

The SOKC F4 offers multiple input options for various audio sources.

Image: Close-up of microphone and line inputs.

• Microphones: Connect dynamic or condenser microphones to the XLR inputs. For condenser microphones, activate the +48V Phantom Power button.
• Line-Level Instruments: Connect instruments like keyboards, synthesizers, or drum machines to the 1/4" LINE inputs.
• External Devices (USB/Bluetooth): For USB playback, insert a USB flash drive into the USB port. For Bluetooth, pair your device as described in the Operating section.

4.3 Connecting Output Devices

• Main Speakers: Connect your main powered speakers or power amplifier to the MAIN OUTPUT (L/R) 1/4" jacks.
• Headphones: Connect headphones to the PHONE output for monitoring.

Image: Connectivity diagram showing various devices connected to the mixer.

5. Operating Instructions

5.1 Powering On/Off

1. Before powering on, ensure all channel level faders and the main level fader are set to their minimum positions.
2. Flip the power switch on the rear panel to the ON position.
3. To power off, reverse the process: lower all faders, then switch off the unit.

5.2 Adjusting Input Levels (GAIN)

The GAIN control adjusts the input sensitivity for each channel. Set it so that the PEAK LED on the channel briefly flashes during the loudest parts of the signal, then back it off slightly to prevent clipping.

5.3 Using Phantom Power (+48V)

Press the +48V PHANTOM button to supply power to condenser microphones. Ensure the microphone is connected before activating phantom power. Do not activate phantom power for dynamic microphones unless specifically required by the microphone's specifications.

5.4 Equalization (EQ)

Use the HIGH, MID, and LOW knobs on each channel to shape the tone of your audio. Adjust these to enhance clarity, reduce unwanted frequencies, or achieve a desired sound.

5.5 Applying Effects (FX/DSP)

The mixer includes built-in digital effects. Use the FX/SEND knob on each channel to send a portion of that channel's signal to the effects processor. Adjust the DELAY and REPEAT knobs in the master effects section to control the characteristics of the effect.

5.6 USB Playback and Recording

• Playback: Insert a USB flash drive with MP3 files into the USB port. Use the transport controls (play/pause, skip) and the LCD display to navigate and play tracks.
• Recording: Connect the mixer to a computer via the USB port. The mixer will be recognized as an audio interface. Use your preferred digital audio workstation (DAW) software to record the mixed output.

5.7 Bluetooth Connectivity

1. Activate Bluetooth on your external device (e.g., smartphone, tablet).
2. On the mixer, select the Bluetooth input mode (usually indicated on the digital display).
3. Search for available devices on your external device and select "SOKC F4" or a similar name.
4. Once paired, audio from your device will play through the mixer. Adjust the USB/Bluetooth level control on the mixer.

5.8 Monitoring

Use the PHONE output with headphones to monitor your mix without affecting the main output. Adjust the PHONE level knob to control headphone volume.

6. Maintenance

• Cleaning: Use a soft, dry cloth to clean the exterior of the mixer. Do not use liquid cleaners or solvents, as they may damage the finish or internal components.
• Storage: When not in use, store the mixer in a cool, dry place away from direct sunlight and extreme temperatures.
• Ventilation: Ensure proper ventilation around the mixer to prevent overheating. Do not block any ventilation openings.
• Power Cord: Regularly inspect the power cord for any signs of damage. If damaged, replace it immediately with an approved cord.

7. Troubleshooting

• No Power: Check if the power adapter is securely connected to both the mixer and the power outlet. Ensure the power switch is ON.
• No Sound Output: Verify that all input sources are connected correctly and their GAIN controls are adjusted. Check channel level faders and the MAIN level fader. Ensure output cables are connected to active speakers or an amplifier.
• Distorted Sound: Reduce the GAIN control for the input channel. Ensure the PEAK LED is not constantly lit. Check that the main output level is not too high, causing clipping in connected speakers/amplifier.
• Microphone Not Working (Condenser Mic): Ensure +48V Phantom Power is activated. Check microphone cable connections.
• Bluetooth Connection Issues: Ensure the mixer is in Bluetooth mode and your device's Bluetooth is enabled and searching. Try unpairing and re-pairing the device.
• USB Playback/Recording Issues: Ensure the USB flash drive is formatted correctly (FAT32) and contains compatible audio files (MP3). For computer recording, verify the mixer is selected as the audio input device in your DAW settings.

8. Specifications

9. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or contact the seller/manufacturer directly. Keep your proof of purchase for warranty claims.