2.1 Channel Bluetooth Audio Power Amplifier Board 50W2+100W - DIY Home

In this review the 2.1 Channel Bluetooth Audio Power Amplifier Board is evaluated as an affordable, capable option for DIY speaker builders and small home theater setups. The board stands out for combining a modern Bluetooth 5.0 input with a 3.5mm AUX option and delivering up to 50W per stereo channel plus 100W to a subwoofer, making it the single best reason to consider it: strong, flexible output in a compact package for hobbyists who want both wireless convenience and deep bass control.

Key Features

• Dual input methods: Bluetooth 5.0 and 3.5mm AUX let users switch between wireless streaming and wired sources for maximum flexibility.
• 2.1 channel output: Up to 50W on left and right channels plus 100W for a subwoofer provides clear stereo and substantial low-end impact when powered correctly.
• Treble and bass adjustment: Dedicated high and low frequency knobs make it easy to tune sound character and add more punch or clarity to speakers.
• Protection features: Built-in short circuit, overcurrent, overheating and anti-reverse connection protection safeguard the amplifier and connected speakers during fault conditions.
• Robust connections: Copper DC connectors and barrier style speaker terminals accept high current without excessive heating or wire damage.

Who It's For

This board is aimed at DIY audio enthusiasts building bookshelf speakers, small home theater systems, or powered speaker projects who want Bluetooth streaming plus the option of a strong subwoofer channel. It is especially useful where space is limited but a surprising amount of power and bass control are required.

People who need a finished, plug-and-play consumer amplifier with full enclosure, remote control or guaranteed high-end audiophile fidelity should look elsewhere; this board is a do-it-yourself component that requires appropriate power supply selection and basic wiring skills to get the best results.

Pros & Cons

Pros

• Delivers plenty of volume and punch for small to medium rooms when paired with suitable speakers.
• Bluetooth 5.0 provides reliable wireless range and easy pairing for modern devices.
• Easy to assemble and hook up using the provided DC head lead and sturdy terminal blocks.

Cons

• Requires an external 12-24V power supply rated at 5A or higher and careful wiring to achieve full output.
• Not a finished consumer unit; users must provide enclosure and cooling for continuous heavy use.

Specifications

Our Verdict

The 2.1 Channel Bluetooth amplifier board is a practical, cost-effective choice for DIYers who want wireless streaming, real low-frequency output and basic tone controls in one compact board. With solid protection features and rugged connections it represents good value for anyone willing to supply the correct power and enclosure, making it a smart pick for hobby builds and small home theater projects.

Frequently Asked Questions

Can I use Bluetooth and AUX at the same time?
The board prioritizes Bluetooth when both inputs are active; disconnect Bluetooth to use the AUX input exclusively.

What power supply do I need?
Use a 12-24V DC supply rated at 5A or higher; insufficient voltage or current will limit output and performance.

Does it protect itself from faults?
Yes, the board includes short circuit, overcurrent, overheating and anti-reverse connection protection to help prevent damage.