1. Introduction
Thank you for choosing the Mr. Dj DM355BT 3-Way 5-Channel Mixer. This compact mixer is designed for versatile audio control, featuring a Bluetooth interface, USB/MP3 playback, and a dedicated microphone section. This manual provides essential information for setting up, operating, and maintaining your mixer to ensure optimal performance and longevity.
Figure 1: Mr. Dj DM355BT Mixer in its retail packaging, highlighting key features like Bluetooth and USB.
2. Safety Information
Please read and understand all safety instructions before operating this device. Retain this manual for future reference.
- Electrical Safety: This unit operates on AC 230V, 50Hz or 12V DC. Ensure the power source matches the required voltage. Do not expose the unit to rain or moisture.
- Ventilation: Ensure adequate ventilation around the unit to prevent overheating. Do not block ventilation openings.
- Placement: Place the unit on a stable, flat surface. Avoid placing it near heat sources or in direct sunlight.
- Servicing: Do not attempt to service this unit yourself. Refer all servicing to qualified personnel.
3. Setup
Follow these steps to properly set up your Mr. Dj DM355BT mixer.
3.1 Power Connection
- Ensure the mixer's power switch, located on the rear panel, is in the 'OFF' position.
- Connect the provided power adapter to the 'AC 12V' input on the rear panel.
- Plug the power adapter into a suitable electrical outlet (AC 230V, 50Hz).
3.2 Audio Input Connections
The DM355BT offers various input options for your audio sources.
- Microphone Input: Connect a microphone to the 6.3mm jack input.
- Line Inputs: Use the stereo RCA inputs for connecting line-level devices such as CD players, media players, or other audio equipment.
- Line/Phono Inputs: These stereo RCA inputs can be switched between line-level and phono-level (turntable) signals. Ensure the correct switch position is selected for your device.
- USB Port: Insert a USB flash drive containing MP3 files into the USB port for direct playback.
3.3 Audio Output Connections
Connect your speakers, amplifiers, or recording devices to the mixer's outputs.
- Master Output: Connect your main amplifier or powered speakers to the stereo RCA 'MASTER' output.
- Monitor Output: Connect a separate monitor system or recording device to the stereo RCA 'MONITOR' output.
- Headphone Output: Plug your headphones into the 6.3mm jack for personal monitoring.
Figure 2: Rear panel connections of the DM355BT mixer, including power, outputs, and various inputs.
4. Operating Instructions
This section details the functions of the mixer's controls and how to operate them.
4.1 Powering On/Off
Flip the 'POWER' switch on the rear panel to the 'ON' position to power on the mixer. The digital display will illuminate. To power off, flip the switch back to 'OFF'.
4.2 Channel Controls
Each channel (CH1, CH2, CH3, CH4, CH5) has dedicated controls:
- GAIN: Adjusts the input sensitivity for the channel.
- EQ (BASS, MID, TREBLE): 2-band equalizer to adjust the low, mid, and high frequencies of the channel's audio.
- VOLUME FADER: Controls the output level of the channel.
4.3 Microphone Section
The microphone section includes:
- MIC VOLUME: Adjusts the microphone's output level.
- MIC EQ (BASS, TREBLE): 2-band equalizer for microphone audio.
- TALK OVER: When activated, this function automatically lowers the volume of the music channels when the microphone is in use, allowing the microphone signal to be heard more clearly.
4.4 MP3 Player / Digital Display Section
This section manages USB and Bluetooth playback.
- LCD Display: Shows track information, playback status, and Bluetooth connection status.
- MODE: Switches between USB and Bluetooth input modes.
- PLAY/PAUSE: Starts or pauses playback.
- PREVIOUS/NEXT: Navigates between tracks.
- VOL+/VOL-: Adjusts the volume of the MP3/Bluetooth source.
- EQ: Cycles through preset equalizer modes for MP3/Bluetooth playback.
4.4.1 Bluetooth Pairing
- Ensure the mixer is powered on and the MP3 player section is in Bluetooth mode (indicated on the LCD).
- On your smartphone, tablet, or other Bluetooth device, enable Bluetooth and search for available devices.
- Select 'DM355BT' from the list of devices. Once paired, the display will indicate a successful connection.
4.5 Master Volume and Monitoring
- MASTER VOLUME: Controls the overall output level of the mixer to the Master Output.
- MON OUT PHONES: Allows selection of which channel or the master output is sent to the monitor output and headphones.
- PHONES VOLUME: Adjusts the volume for the headphone output.
Figure 3: Top-down view of the DM355BT mixer's control panel, detailing channel faders, EQ knobs, microphone controls, and the MP3 player section with digital display.
5. Maintenance
Proper maintenance ensures the longevity and optimal performance of your mixer.
- Cleaning: Use a soft, dry cloth to clean the exterior of the mixer. Do not use abrasive cleaners, solvents, or waxes.
- Storage: When not in use, store the mixer in a cool, dry place away from direct sunlight and extreme temperatures.
- Dust Protection: Keep the unit covered when not in use to prevent dust accumulation, especially in faders and knobs.
6. Troubleshooting
If you encounter issues with your DM355BT mixer, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cable not connected; Power switch off; Faulty outlet | Check power cable connections; Ensure power switch is ON; Try a different outlet |
| No sound output | Master volume low; Channel volume low; Incorrect input/output connections; Amplifier off | Increase Master and Channel volumes; Verify all audio connections; Ensure amplifier is on and working |
| Bluetooth not connecting | Mixer not in Bluetooth mode; Device too far; Already connected to another device | Ensure mixer is in Bluetooth mode; Bring device closer; Disconnect from other devices and retry pairing |
| USB playback issues | Unsupported file format; USB drive corrupted; Mixer not in USB mode | Ensure files are MP3 format; Try a different USB drive; Switch mixer to USB mode |
If the problem persists after trying these solutions, please contact Mr. Dj customer support.
7. Specifications
Technical specifications for the Mr. Dj DM355BT Mixer:
- Model Number: DM355BT
- Channels: 5
- Connectivity Technology: Bluetooth, USB
- Power Source: Cable electric (AC 230V, 50Hz or 12V DC)
- Frequency Response: 20 Hz – 20 KHz
- Distortion: <0.02%
- SNR (Signal-to-Noise Ratio): > 70 dB
- Product Dimensions: 30.48 x 11.43 x 20.32 cm (12 x 4.5 x 8 inches)
- Product Weight: 2.27 kg (5 lbs)
- Display: LCD Digital Display
- Microphone Section: Talk-over function, 2-band EQ
8. Warranty and Support
For warranty information and customer support, please refer to the documentation provided with your purchase or visit the official Mr. Dj website. Keep your proof of purchase for any warranty claims.
