TWS Bluetooth Amplifier Board 100W Mono - Compact High-Efficiency

In this review of the TWS Bluetooth Amplifier Board, the bottom line is simple: this is a compact, efficient Class D amplifier module aimed at DIY builders and small speaker projects who want flexible input options and the ability to pair two units for true stereo. The single biggest reason to consider it is the TPA3116D2-based power stage combined with multi-input support, which delivers strong output and low distortion for a very small package. It is best suited for hobbyists who need a cheap, capable amp module rather than a polished consumer product.

Key Features

• TPA3116D2 chip: Provides high efficiency and low distortion so single-driver speaker builds sound clean and powerful without excessive heat.
• TWS pairing function: Lets two identical modules act as left and right channels wirelessly, creating a stereo setup without running speaker wires.
• Multi-input support: Bluetooth, AUX, USB flash drive and USB sound card inputs make it easy to feed the amplifier from phones, TVs, PCs or thumb drives.
• Knob control: A multifunction knob offers volume, play/pause, track skip and long-press power for simple, tactile operation on DIY enclosures.
• Status indicators: Two LEDs clearly show board power/work status and TWS mode state to simplify troubleshooting and pairing.

Who It's For

This module is aimed at electronics hobbyists, DIY speaker builders and anyone who needs a space-saving 100W mono amp that can be converted to stereo with a second unit. It fits well into custom enclosures for desktop audio, a small home theater sub or car audio projects where a compact, efficient amp is required.

It is not the best choice for buyers who want plug-and-play, full-featured consumer components with guaranteed compatibility and polished firmware support. Some users report mixed results with TWS pairing and compatibility with every USB sound card, so professionals seeking rock-solid, out-of-the-box stereo systems should consider more expensive integrated amplifiers.

Pros & Cons

Pros

• High efficiency and clean output thanks to the TPA3116D2 Class D amplifier design.
• Flexible inputs (Bluetooth, AUX, USB flash, USB sound card) cover most common playback sources.
• TWS box matching enables wireless stereo with a matched pair, useful for true stereo DIY builds.
• Compact size and a multifunction knob make it easy to integrate into custom projects and enclosures.

Cons

• TWS functionality and compatibility receive mixed feedback from users, so pairing may require troubleshooting or not work in every setup.
• As a hobbyist module, it lacks the refinement and guaranteed interoperability of higher-end consumer amps.

Specifications

Chip	TPA3116D2
Power	100W mono (DC 7-24V)
Voltage	DC 7V-24V
Inputs	Bluetooth, AUX, USB flash drive, USB sound card
Functions	TWS box matching, volume/playback knob, power on/off
Indicators	Work indicator and TWS mode indicator

Our Verdict

The PEMENOL TWS Bluetooth Amplifier Board is a strong value for DIYers who want an efficient, compact Class D amp with multiple inputs and optional wireless stereo via TWS pairing. It delivers clean sound and useful features for the price, though buyers should be prepared for occasional TWS compatibility quirks and the typical limitations of a hobbyist module.

Frequently Asked Questions

Can two boards be used as left and right channels?
Yes, the TWS box matching function is designed to let two identical modules operate as left and right channels for wireless stereo.

What inputs are available on the module?
The board supports Bluetooth, AUX, USB flash drive playback and USB sound card input for flexible source options.

What power supply does it need?
It runs from a DC 7V-24V supply; use a stable supply sized to handle the amplifier current for your speaker load.