CMU TPA3116D2 100W Subwoofer Amplifier Board 8-25VDC 8

The CMU TPA3116D2 100W Subwoofer Amplifier Board is a high-performance Class-D digital audio amplifier module designed specifically for low-frequency (subwoofer) applications. Built around the powerful and efficient Texas Instruments TPA3116D2 amplifier chip, this board delivers clean, punchy bass output with excellent efficiency, low distortion, and stable thermal performance.

This amplifier module is ideal for DIY audio projects, active subwoofer systems, home audio builds, car audio systems, portable speaker projects, and custom sound systems where compact size and high output power are required. With a maximum output of 100W at 8 , it provides strong, deep bass reproduction while maintaining clarity and low noise levels.

The board features a NE5532 high-quality op-amp buffer stage, which improves signal conditioning and ensures clean input processing before amplification. This results in better dynamic range, improved signal stability, and reduced distortion-making it suitable for both professional and enthusiast audio applications.

Designed for flexibility, the amplifier operates from a wide DC power range of 8V to 25V, allowing compatibility with various power sources such as laptop power adapters, battery packs, DC power supplies, and custom power systems. The standard 5.5mm DC power jack ensures easy and universal power connection.

The TPA3116D2 Class-D architecture ensures:

High energy efficiency

Low heat generation

Minimal power loss

Compact design

Long-term reliability

This makes the board perfect for continuous operation in compact enclosures without the need for large heat sinks or cooling fans.

Key Applications

DIY subwoofer amplifier builds

Active subwoofer speaker systems

Home audio bass modules

Car subwoofer systems

Custom audio projects

Bluetooth speaker systems (with external BT module)

Portable sound systems

Multimedia speaker upgrades

Performance & Power Notes

At 12V 1A, suitable for small 3-4 inch speakers

At 19V 5A, suitable for large 8-10 inch subwoofers

Higher voltage and current = higher output power and stronger bass performance

Key Features

High-efficiency Class-D digital amplifier

Powerful TPA3116D2 amplifier IC

100W output power (8 load)

NE5532 op-amp buffer stage for clean signal processing

Wide 8-25V DC input range

Compact PCB design (75 × 60 mm)

Low noise and low distortion

Excellent thermal performance

Standard 5.5mm DC power jack

Ideal for DIY and professional projects

Technical Specifications

Amplifier Chip: TPA3116D2

Op-Amp: NE5532

Output Power: Up to 100W

Speaker Impedance: 8

Power Supply: DC 8-25V

PCB Size: 75 × 60 mm

Connector Type: 5.5mm DC jack

Amplifier Type: Class-D Digital

Application Type: Low frequency / subwoofer amplifier

This CMU TPA3116D2 100W Subwoofer Amplifier Board is the perfect choice for anyone looking to build a powerful, compact, energy-efficient bass amplifier system with professional-grade performance and reliability.

What's in the box
1 x CMU TPA3116D2 100W Subwoofer Amplifier Board 8-25VDC 8