This board is a Bluetooth audio receiver with a powerful stereo audio amplifier that can deliver up to 2x50W (at 24V and with 4 Ohm speakers).
At 12V and with 8 Ohm speakers, the board delivers 2x15W.
Audio can also be supplied via 3.5mm analog in and via USB C. There is a app available from the vendor that can optionally be used to control the device.
Technical Data
| Item | Description |
|---|---|
| Power Supply | 12-24V, 60W |
| Audio Amplifier | 2x50W |
| Amplifier Chip | CS8673 (similar to TPA3116) |
| Speaker Impedance | 4-16 Ohm, 30-200W |
| Audio In | Headphone Jack 3.5mm |
| Bluetooth Standard | 5.1 |
| Bluetooth Distance | <15 Meter |
| Size | 52x52x20 |
The board comes with power reverse connection protection, short circuit protection, and self recovery after overheating.
If the supplied power is less than 60W, you may still use it for low volume settings. When power supply becomes insufficient, audio quality will deteriorate.
Amplifier
The amplifier used is the CS8673 which seems to be a clone of the TPA3116 but with similar specs.
The original datasheet is available in Chinese only.
Audio Power
The actual maximum audio power depends on supply voltage and speaker impedance:
| Voltage (V) | Impedance (Ohm) | Max Power (W) |
|---|---|---|
| 12 | 8 | 2x15W |
| 12 | 4 | 2x20W |
| 15 | 8 | 2x18W |
| 15 | 4 | 2x30W |
| 19 | 8 | 2x32W |
| 19 | 4 | 2x45W |
| 24 | 8 | 2x40W |
| 24 | 4 | 2x50W |
Power Supply
Power is supplied via a male cinch connector (12-24V).
Audio In
Typically, this board receives audio information wireless over the air via Bluetooth 5.0.
Audio can also be fed into the board either using the 3.5mm jack marked AUX IN, or via the USB C-connector (that can be used to supply (U Disk or USB Sound Card).
Audio Out
One of the 3.5mm jacks on the board is labeled AUX OUT and can be used to connect headphones.
Screw terminals are provided to connect two speakers (left and right).
Volume Control
In the center of the board, a rotary encoder can be used to adjust volume.
The rotary encoder can also be pressed:
- Play/Pause: short press the rotary encoder
- On/Off: long press the rotary encoder
This board can also be controlled via the YS Audio App.
Bluetooth Connect
After supplying power, the device is in bluetooth pairing mode and can be detected by smartphone etc.
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(content created Apr 14, 2024)