S350HS TPA3251 Bluetooth Power Amplifier Board with Subwoofer 2.1 Channel 220W×2+350W, 12V-38V Audio Power Amplifier Module with Treble and Bass Control,Black(No power adapter included)

• 【TPA3251 HIFI CHIP】The TPA3251 Chip Solution: Stereo 2.1channel Output to Ensure Continuous Serial High-power Operation, Wide Voltage Input DC: 12-38V,This power amplifier board uses two TPA3251 high-fidelity maximum output power up to 220W*2+350W.
• 【MULTIPLE INPUT METHOD】The S350HS has multiple input methods such as Bluetooth input, AUX input, and USB drive input. The vast majority of devices can be used, such as mobile phones, televisions, laptops, etc., making it easy to connect and use.
• 【TREBLE & BASS CONTROL】If you are tired of an amplifier with only one volume knob, then you feel right, because you have further requirements for audio. By adjusting the high and low frequency knobs of the S350HS power amplifier board, you can make the sound more layered and make the bass more shocking.
• 【PROTECTION FUNCTION】S350HS Bluetooth power amplifier board has multiple protection mechanisms to ensure its safe operation. It has short-circuit protection, over-current, over-heat, and anti-reverse protection. When an overload occurs, the device reports the fault condition to the processor to protect itself from damage

This amplifier board does not come with a power supply or audio cable; users need to purchase them separately. The amplifier board supports a DC 12-36V power input. The minimum operating voltage is 12V, and the maximum is 36V. Within this voltage range, the higher the input voltage, the greater the output power. Below are three recommended specifications for DC power adapters:

• 12V/5A DC Power Adapter: (A common power supply with high cost performance, suitable for small speakers under 4 inches. Limited output power.)
• 24V/5A DC Power Adapter: (A common power supply with high cost performance, suitable for speakers under 5 inches. Highly recommended!!)
• 36V/10A DC Power Adapter: (Relatively expensive but provides higher output power. Highly recommended!!! Suitable for high-power speakers over 5 inches.)

Multifunctional Knob

• Single click: Pause/Play
• Double click: Next track
• Triple click: Previous track
• Quadruple click: Switch input mode
• Quintuple click: Reset to factory settings
• Long press: Enter low-power standby mode

Input Mode Instructions

• Bluetooth Mode: After connecting to a DC power supply, search for and pair with DAJUNGUO AUDIO in your phone’s Bluetooth list to enable Bluetooth playback.
• USB Mode: Use a USB flash drive with a capacity of 32GB or less, formatted as FAT32. Supported playback formats include MP3, WAV, APE, and FLAC. WAV supports lossless bitrates up to 1411kbps. FLAC supports lossless bitrates up to 1000kbps and a sampling rate of 44100Hz.
• AUX Mode: This amplifier board uses a 3.5mm audio signal input. When using AUX mode, it’s recommended to select a well-shielded audio cable for better sound quality.

Warm Tips:

This product features playback mode memory. For instance:

• If AUX mode is used before power-off, the amplifier will automatically default to AUX mode when powered on again.
• If Bluetooth mode is used before power-off, the amplifier will return to Bluetooth mode when powered on next time.