Parts Express TPS3116D2 Class D 2.1 Bluetooth Amplifier Board

Our review of the Parts Express TPS3116D2 finds it best suited for DIY builders and hobbyists who need a compact, powerful 2.1 amplifier board with modern connectivity. The single biggest reason to buy is the combination of Class D efficiency and Bluetooth 5.0 on a pre-assembled board that delivers 50W per satellite channel plus 100W to a mono subwoofer while offering on-board tone and crossover controls for quick tuning. It removes much of the guesswork for projects like portable speaker builds, car or boat audio upgrades, and small powered boombox designs.

Key Features

• Dual satellite and sub power: Two 50W stereo channels plus a 100W mono sub output provide clear satellite presence and a powerful low end for compact enclosures.
• Bluetooth 5.0 wireless: Built-in Bluetooth simplifies source pairing without an external receiver, making deployment faster for mobile or desktop projects.
• Flexible input and outputs: A 3.5 mm aux-in jack, DC power jack, and Phoenix speaker connectors allow quick hookup to common devices and wired speakers.
• On-board tone and crossover controls: Master volume, treble, satellite volume, subwoofer volume, and a variable low-pass filter let you tune the system without extra parts.
• Wide DC supply range: Runs from 12 to 24 VDC so it can be powered by small batteries, vehicle systems, or bench supplies for versatile use cases.
• Pre-assembled and tested: Ships ready to install so builders spend time integrating the board instead of troubleshooting assembly issues.

Who It's For

This board is ideal for electronics hobbyists, DIY audio builders, and mobile audio tinkerers who want a compact 2.1 solution with both Bluetooth and adjustable tone control. It works well for small powered boombox projects, desktop speaker systems with a separate sub, and for upgrading existing enclosures where space and efficiency matter.

Those who should look elsewhere include buyers who need full-featured consumer AV receivers with HDMI, room correction, or multiroom networking, and users who prefer an out-of-the-box finished speaker system rather than a bare amplifier board for integration.

Pros & Cons

Pros

• High power density with 2 x 50W and a 100W sub channel in a compact Class D design.
• Bluetooth 5.0 on-board removes the need for a separate wireless receiver in many builds.
• Multiple control potentiometers and a low-pass filter make tuning the sound quick and intuitive.
• Pre-assembled and pre-tested for faster, more reliable project integration.

Cons

• As a bare board, it requires enclosure, cooling consideration, and wiring expertise to reach full performance.

Specifications

Configuration	2.1 channel Class D amplifier board
Satellite power	50W per channel
Subwoofer power	100W mono
Bluetooth	Wireless 5.0
Power input	12 to 24 VDC via DC jack
Inputs	3.5 mm aux-in jack
Speaker connections	Phoenix speaker connectors

Our Verdict

The Parts Express TPS3116D2 is a strong value for DIYers who need a compact, efficient 2.1 solution with wireless capability and on-board tuning. Its power per channel, flexible 12 to 24 VDC supply, and pre-tested assembly make it easy to integrate into portable speakers or small home projects where tight space and clear bass are priorities.

Frequently Asked Questions

Can this run from a car or battery?
Yes, the board accepts 12 to 24 VDC so it can be powered from vehicle systems or appropriate battery packs with proper wiring and fusing.

Does it include speaker terminals?
Yes, it uses Phoenix speaker connectors for quick and secure speaker wiring during installation.

Is the low-pass filter adjustable?
Yes, a variable low-pass filter potentiometer is provided on-board to tailor subwoofer crossover frequency.