XY-AS21HPA 300W*2+600W Audio Amplifier Board Instruction Manual

1. Introduction

The XY-AS21HPA is a high-performance 2.1 channel audio amplifier board designed to deliver exceptional sound quality. It integrates two original TPA3255 amplifier chips, ensuring dual-core stability and efficiency. The TPA3255 chip, a D-class power amplifier, utilizes an advanced integrated feedback design and proprietary high-speed gate driver error correction (PurePath HD) to maintain ultra-low distortion across the entire audio frequency band, providing a high-definition audio experience.

This amplifier board offers versatile audio input options including Bluetooth 5.2, AUX, USB flash drive, and USB sound card, making it suitable for various audio setups.

2. Features

• High-Performance Chip: Utilizes two TPA3255 amplifier chips for high efficiency, low power consumption, and superior sound quality.
• Comprehensive Protection: Includes reverse power protection for enhanced safety.
• User-Friendly Controls: Independent tuning for high and low frequencies, along with dedicated volume controls for left/right channels and subwoofer.
• Low Loss Design: Incorporates digital amplifier specific inductors to minimize power loss.
• Multiple Audio Inputs: Supports Bluetooth 5.2, AUX, USB flash drive, and USB sound card.
• Audio Decoding: Supports AAC and SBC for Bluetooth audio, and WAV, FLAC, APE, MP3 for USB decoding.

3. Specifications

Output Power (Left and Right Channel)

• 30W+30W @ 8Ω/24VDC
• 70W+70W @ 4Ω/24VDC
• 80W+80W @ 8Ω/36VDC
• 160W+160W @ 4Ω/36VDC
• 160W+160W @ 8Ω/50VDC
• 300W+300W @ 4Ω/50VDC

Output Power (Subwoofer)

• 30W @ 8Ω/24VDC
• 70W @ 4Ω/24VDC
• 150W @ 2Ω/24VDC
• 80W @ 8Ω/36VDC
• 160W @ 4Ω/36VDC
• 350W @ 2Ω/36VDC
• 160W @ 8Ω/50VDC
• 300W @ 4Ω/50VDC
• 600W @ 2Ω/50VDC

Product Dimensions

Diagram illustrating the physical dimensions of the amplifier board.

4. Package Contents

The package includes:

• 1x XY-AS21HPA Audio Amplifier Board
• Necessary accessories for assembly (e.g., screws, standoffs, screwdriver, panel for integrated versions).

Integrated panel version with included accessories.

5. Setup

5.1 Power Supply Connection

Connect a DC power supply within the range of 19-51V and at least 10A to the DC socket interface (5.5-2.5mm) on the board. Ensure correct polarity to prevent damage, although the board features reverse power protection.

5.2 Speaker Connections

Connect your speakers to the designated terminals:

• Speaker (Right): Connect your right channel speaker here.
• Speaker (Left): Connect your left channel speaker here.
• Speaker (Subwoofer): Connect your subwoofer here.

5.3 Audio Input Connections

Choose your preferred audio input method:

• AUX Input: Connect an audio source (e.g., smartphone, MP3 player) using a 3.5mm audio cable to the AUX input jack.
• USB Audio (USB Flash Disk): Insert a USB flash drive containing audio files into the USB port.
• Bluetooth Antenna: If using Bluetooth, connect an external Bluetooth antenna to the welded IPEX interface for optimal signal reception.

Detailed diagram of cable connections and control functions.

Bluetooth antenna interface and connection example.

5.4 Potentiometer Versions

The amplifier board is available in different configurations:

• Integrated Potentiometer Version: Controls are directly mounted on the board.
• External Potentiometer Version: Controls are connected via cables, allowing for remote mounting.

Integrated Potentiometer Version.

External Potentiometer Version.

6. Operating Instructions

6.1 Basic Controls

The main button on the amplifier board provides multiple functions:

• Click: Play/Pause audio.
• Double-click: Skip to the next track.
• Triple-click: Go to the previous track.
• Four clicks: Switch between input modes (Bluetooth, AUX, USB).
• Long-press: Power on/off the amplifier.

Adjust the dedicated knobs for:

• Subwoofer frequency
• Subwoofer volume
• Treble adjustment
• Bass adjustment
• Left and right channel volume adjustment

6.2 Bluetooth Connection

1. Ensure the amplifier board is powered on and in Bluetooth mode (check BT LED).
2. On your mobile phone or device, turn on Bluetooth.
3. Search for available devices and select "XinYi BT" to pair.
4. Once connected, you can play music from your device through the amplifier.

Bluetooth connection tips for mobile devices.

6.3 APP Control

For advanced control and customization, connect the amplifier board to its dedicated mobile application:

1. Download and install the official control APP (e.g., search for "XYV122UE" in your app store).
2. Open the APP and search for the amplifier board (XYV122UE).
3. Within the APP, you can change the Bluetooth device name and set a pairing password. Remember to click the "Set" button to save changes.

Using the connected APP to customize Bluetooth settings.

6.4 USB Flash Drive Playback and EQ

When using a USB flash drive as an audio source:

1. Insert your USB flash drive into the designated USB port.
2. Use the control button (or APP) to navigate to the USB input mode.
3. If using the APP, click the relevant button to open the USB flash drive music list and select your desired music.
4. The APP also allows you to open an equalizer and adjust sound settings to your preference.

USB flash drive music list and equalizer adjustment via APP.

Product overview video showcasing the amplifier board's features and different versions.

7. Maintenance

• Keep the amplifier board in a dry environment, away from moisture and direct sunlight.
• Clean the surface gently with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials.
• Ensure proper ventilation around the board, especially around the heat sink and fan, to prevent overheating.
• Avoid exposing the device to extreme temperatures.

8. Troubleshooting

• No Power: Check if the power supply is correctly connected and provides the specified voltage (DC19-51V) and current (10A or above). Ensure the power button is long-pressed to turn on.
• No Sound: Verify all speaker connections are secure. Check the audio input source (Bluetooth, AUX, USB) and ensure it is selected correctly. Adjust volume levels for both the amplifier and the audio source.
• Distorted Sound: Ensure the input audio signal is not too strong, causing clipping. Check speaker impedance matches the amplifier's capabilities. Reduce volume if distortion occurs at high levels.
• Bluetooth Connection Issues: Make sure the amplifier is in Bluetooth mode. Try restarting both the amplifier and your Bluetooth device. Ensure no other devices are interfering with the Bluetooth signal.
• USB Playback Issues: Check if the USB flash drive is formatted correctly (FAT32 is common) and contains supported audio file types (WAV, FLAC, APE, MP3).

9. User Tips

While no specific user tips were available from reviews or Q&A, here are some general recommendations for optimizing your experience:

• Optimal Power Supply: Using a high-quality, stable power supply within the recommended voltage and current range (DC19-51V/10A or above) is crucial for achieving the best performance and power output from the TPA3255 chips.
• Speaker Matching: Ensure your speakers' impedance and power handling capabilities are compatible with the amplifier's output specifications to prevent damage and achieve optimal sound.
• Cable Quality: Invest in good quality audio cables for AUX and speaker connections to minimize signal loss and interference.
• APP Customization: Explore the mobile application's equalizer and sound settings to fine-tune the audio output to your personal preferences and room acoustics.

10. Warranty and Support

For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly. Retain your purchase receipt as proof of purchase.