Bluetooth Audio Receiver Power Amplifier Board 25W - Compact Stereo

In this review the Bluetooth Audio Receiver Power Amplifier Board is evaluated as a compact, easy-to-integrate amp for DIY home and portable speaker projects. The single biggest reason to buy is its combination of Bluetooth 4.0 streaming using the CSR8635 chip and a 25W TDA7492P amplifier on a lightweight 38g board that runs from 8V to 25V DC, which makes it ready for 12V and 24V systems without extra converters. It is best for hobbyists and installers who need a simple wireless input and decent power for small to medium speakers.

Key Features

• Bluetooth 4.0 Connectivity: The CSR8635 chip provides broad compatibility for stereo input from phones, tablets, and other Bluetooth devices so streaming is straightforward.
• Auto Pairing: The board automatically enters pairing mode at power on and appears as SANWU Audio, removing the need for manual configuration.
• 25W Output Power: The TDA7492P amplifier delivers clear, robust sound suitable for home audio and portable speaker builds that need respectable volume and headroom.
• Wide Voltage Range: Operation from 8V to 25V DC makes the board adaptable to common 12V and 24V systems without extra power hardware.
• Adjustable Gain: A gain switch lets users fine tune output level to match speaker sensitivity and avoid clipping or distortion.
• Compact Design: Weighing only 38g, the small footprint is easy to fit inside enclosures or retrofit into existing speaker cabinets.

Who It's For

The board is ideal for electronics hobbyists, DIY speaker builders, and small-scale installers who want a low-cost way to add Bluetooth streaming and a 25W amplifier to home or portable speakers. Its automatic pairing and wide voltage tolerance make it particularly useful for projects that will run on 12V or 24V power supplies.

Those seeking hi-fi reference sound or multi-channel home theater processing should look elsewhere; this board is designed for straightforward stereo use and integration rather than advanced signal processing or high-end audiophile systems.

Pros & Cons

Pros

• Simple Bluetooth 4.0 pairing with CSR8635 provides broad device support and reliable wireless input.
• 25W TDA7492P amplifier gives energetic, clear output for small to medium speakers.
• Compact, lightweight design and wide 8V-25V input makes installation flexible across many projects.
• Adjustable gain switch helps match output to a variety of speaker impedances from 4 to 16 ohms.

Cons

• No built-in advanced controls like tone or DSP, so sound tuning is limited to gain and external speakers' characteristics.
• Not intended for high-end audiophile use or multi-channel setups where separate processing is required.

Specifications

Bluetooth Chip	CSR8635 (Bluetooth 4.0)
Amplifier IC	TDA7492P
Output Power	25W
Operating Voltage	8V - 25V DC
Speaker Impedance	4, 6, 8, 16 ohm compatible
Weight	38g

Our Verdict

This Bluetooth amplifier board is a practical, cost-effective solution for hobbyists and installers who need wireless streaming plus a 25W amplifier in a compact package. It offers reliable auto-pairing, adjustable gain, and wide voltage compatibility, which together make it a good value for straightforward stereo speaker projects that do not require advanced DSP or multi-channel features.

Frequently Asked Questions

How do I pair the board with a phone?
The board auto-enters pairing mode at power on and appears as SANWU Audio; select that device on your phone to connect.

What voltages will this board run on?
It runs from 8V to 25V DC, making it suitable for common 12V and 24V power systems.

What speaker impedances are supported?
It is designed to drive speakers with impedances of 4, 6, 8, and 16 ohm.