The TPA3118 DC 12V-24V 60W Mono Digital Audio Amplifier Board is a high-power, high-efficiency Class D amplifier designed for serious sound projects. At Electrapac, we recommend this module for building dedicated subwoofers, center channel speakers, or mono PA systems where you need raw power in a tiny form factor.

Product Overview

Unlike smaller stereo modules, this board is configured in PBTL (Parallel Bridge-Tied Load) mode. This configuration combines the amplifier's internal channels into a single "Mono" output, allowing it to drive larger speakers with up to 60 Watts of power while maintaining excellent heat management.

Key Features for Electrapac Customers

• Powerful Mono Output: Delivering a full 60W, this board is significantly louder than standard 15W or 30W stereo modules, making it the best choice for "Bass Boom" subwoofer builds.

• Low Noise Floor: The TPA3118 chip features advanced oscillator/PLL circuitry that avoids AM interference and provides a clean, hiss-free audio experience.

• Integrated Mute Port: Includes dedicated solder pads for a Mute function. Shorting these pads will instantly silence the output, useful for integrating with microcontrollers or "Smart" audio systems.

• Advanced Protection Suite: Fully guarded against faults. If you accidentally short the speaker wires or the chip gets too hot, the onboard protection will shut it down to prevent permanent damage.

• No Large Heat Sink Needed: Thanks to its high efficiency, it runs remarkably cool. However, for continuous high-power 24V operation, we recommend sticking a small aluminum heat sink onto the main chip.

Wiring & Connection Guide

For the best results from your www.electrapac.com purchase, follow these steps:

1. Power Input: Connect your DC source (e.g., a 19V laptop adapter or 24V industrial supply) to the VCC and GND pads.

2. Audio Input: Connect your source to IN+ and IN-. Since this is a mono board, if you have a stereo source (L/R), you should merge the channels using a pair of 1kΩ resistors.

3. Speaker Output: Connect a single 4Ω or 8Ω speaker (rated for at least 50W–100W) to the SPK+ and SPK- terminals.

Primary Applications

• Subwoofer Systems: Perfect for adding a dedicated bass channel to a 2.1 home theater setup.

• Portable PA Systems: Building battery-powered "Loudhailers" or outdoor announcement speakers.

• Active Speaker Upgrades: Replace weak internal amplifiers in old speakers with this high-power digital alternative.

• Instrument Amplifiers: Ideal for DIY practice amps for guitars or keyboards.

Why Shop at Electrapac?

We source high-grade TPA3118 modules with superior filter capacitors for stable, long-term performance. Visit us at www.electrapac.com to find this board, high-voltage power adapters, and 12V–24V power supplies.