1. Introduction
This user manual provides detailed instructions for the DAJUNGUO S600X 2.1 Channel Amplifier Board. The S600X is a high-performance audio amplifier designed for stereo 2.1 channel output, featuring dual TPA3255 chips, multiple input methods including Bluetooth 5.2, AUX, and USB, and robust protection mechanisms. Please read this manual thoroughly before operating the device to ensure proper setup and safe usage.
Figure 1: DAJUNGUO S600X 2.1 Channel Amplifier Board overview.
2. Key Features
- Multiple Input Methods: Supports Bluetooth, AUX, USB flash drive, and USB sound card inputs, ensuring compatibility with a wide range of devices such as mobile phones, televisions, and laptops.
- Dual TPA3255 Chip Design: Equipped with two TPA3255 chips for powerful 2.1 channel stereo output, delivering up to 300W per stereo channel and 600W for the subwoofer channel.
- Upgraded DC Socket: Features a gold-plated high-current shielded DC socket (5.5 * 2.5mm) designed to prevent sparks during power connection.
- Comprehensive Protection Functions: Includes short-circuit protection, over-current protection, over-heat protection, and anti-reverse protection to ensure safe and reliable operation. The device reports fault conditions to protect itself from damage.
Figure 2: The S600X amplifier board featuring dual TPA3255 chips for high power output.
Figure 3: Illustration of the S600X's versatile input options: Bluetooth, 3.5mm AUX, and USB mode.
3. Setup Guide
3.1 Package Contents
Ensure all components are present:
- S600X 2.1 Channel Amplifier Board
- Small screwdriver (for speaker terminals)
- (Note: Power adapter and audio cables are typically sold separately.)
3.2 Power Connection
Connect a DC power supply (19-51V, 10A or above recommended) to the upgraded DC socket (5.5 * 2.5mm) on the amplifier board. Ensure the power supply is off before connecting.
Figure 4: Detailed view of the S600X amplifier board's connection points, including DC input, audio inputs, and speaker outputs.
3.3 Speaker Connections
Connect your passive speakers to the appropriate terminals. The S600X supports:
- Left & Right Speakers: Connect to the L&R Channel terminals. Recommended impedance: 4-8Ω.
- Subwoofer: Connect to the Subwoofer terminals. Recommended impedance: 2-8Ω.
Ensure correct polarity (+ to + and - to -) for all speaker connections to prevent phase issues and ensure optimal sound quality. The upgraded terminals are compatible with a wider range of cable sizes.
3.4 Audio Input Connection
Choose one of the following input methods:
- Bluetooth Input: Power on the amplifier. The Bluetooth indicator will flash. Search for "S600X" on your device and pair.
- AUX Input: Connect your audio source (e.g., phone, TV, laptop) to the 3.5mm AUX input jack using an audio cable.
- USB Flash Drive Input: Insert a USB flash drive (FAT32 format, ≤32GB) containing audio files into the USB port.
- USB Sound Card Input: Connect the amplifier to a computer via the USB port to use it as an external sound card.
Figure 5: The three primary audio input methods available on the S600X amplifier board.
Figure 6: Example of connecting an audio source via the 3.5mm AUX input.
4. Operating Instructions
4.1 Multifunctional Knob Operation
The main knob on the amplifier serves multiple functions:
- Click: Play / Pause audio.
- Two Clicks: Skip to the Next Song.
- Three Clicks: Go to the Previous Song.
- Four Clicks: Switch Input Mode (USB, AUX, Bluetooth).
- Five Clicks: Restore Factory Settings.
- Long Press: Power ON / OFF (Standby).
Figure 7: Functions of the multifunctional knob for audio control and mode switching.
4.2 Volume and Tone Controls
Adjust the following knobs to customize your audio experience:
- L&R VOL: Adjusts the master volume for the Left and Right stereo channels.
- L&R TRE: Adjusts the treble level for the Left and Right stereo channels.
- L&R BASS: Adjusts the bass level for the Left and Right stereo channels.
- SUB-VOL: Adjusts the volume level of the subwoofer output.
- SUB-FREQ: Adjusts the crossover frequency for the subwoofer, allowing you to control which frequencies are sent to the subwoofer.
Figure 8: Layout of the control knobs for volume, tone, and subwoofer adjustments.
5. Maintenance
To ensure the longevity and optimal performance of your S600X amplifier board, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to wipe the surface of the amplifier. Avoid using liquid cleaners or solvents, as they may damage the components.
- Ventilation: Ensure the amplifier is placed in a well-ventilated area. Do not block the cooling fan or heatsink, as proper airflow is crucial for heat dissipation.
- Storage: When not in use for extended periods, store the amplifier in a cool, dry place away from direct sunlight and excessive dust.
- Connections: Periodically check all cable connections to ensure they are secure and free from corrosion.
Figure 9: Internal view highlighting the large cooling fan and heatsink for thermal management.
6. Troubleshooting
The S600X amplifier board is designed with multiple protection mechanisms. If you encounter issues, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output. | Incorrect input selection; loose speaker connections; low volume; power issue. |
|
| Distorted sound. | Volume too high; incorrect impedance speakers; faulty audio source. |
|
| Bluetooth connection issues. | Device too far; interference; amplifier not in pairing mode. |
|
| Amplifier shuts down unexpectedly. | Over-heat, over-current, or short-circuit protection activated. |
|
7. Specifications
| Parameter | Value |
|---|---|
| Model Number | S600X |
| Chip | Dual TPA3255 |
| Input Voltage (DC) | 19-51V / 10A or Above |
| Bluetooth Version | 5.2 |
| USB Decoding Format | WAV, FLAC, APE, MP3 |
| Adapted Speaker (L&R) | 4-8Ω |
| Adapted Speaker (Subwoofer) | 2-8Ω |
| Output Power (L&R Channels) | ≤300W per channel |
| Output Power (Subwoofer) | ≤600W |
| Product Size | 4.92 x 4.84 x 1.69 inches (125 x 123 x 43mm) |
| Product Weight | 490g (1.09 Pounds) |
| Mounting Type | Surface Mount |
Figure 10: Physical dimensions and key specifications of the S600X amplifier.
7.1 Power Output Comparison Table (@1kHz)
| DC Voltage | Channel | Speaker Impedance | Power Output |
|---|---|---|---|
| 24V | R & L | 8Ω | 30W+30W |
| R & L | 4Ω | 70W+70W | |
| Subwoofer | 8Ω | 30W | |
| 36V | R & L | 8Ω | 80W+80W |
| R & L | 4Ω | 160W+160W | |
| Subwoofer | 8Ω | 80W | |
| 50V | R & L | 8Ω | 160W+160W |
| R & L | 4Ω | 300W+300W | |
| Subwoofer | 4Ω | 300W | |
| Subwoofer | 2Ω | 600W |
Figure 11: Detailed power output capabilities of the S600X at various DC voltages and speaker impedances.
8. Warranty and Support
DAJUNGUO is committed to customer satisfaction. If you have any questions about the S600X amplifier board, or if you encounter any quality problems with the product, please do not hesitate to contact our customer service team. We offer 7x24 hours after-sales service and are dedicated to providing you with a satisfactory resolution.
Please refer to your purchase documentation for specific warranty terms and contact information.