DIY Harman Kardon 2.0 Speakers with TPA3116D2

If someone is interested in building DIY Harman Kardon 2.0 speakers, this project provides a simple way to create a smaller pair of speakers using readily available audio components.

With a pair of two-way passive speakers, crossovers, banana plug sockets, and a 2.0-channel amplifier based on the TPA3116D2 with an output of up to 2 × 100 W, the project can be completed with a relatively simple modification process. The speaker enclosures can also be designed and produced using a 3D printer, allowing the overall size and appearance to be customized.

The first step is to remove the metal frame from the outside of each speaker and take out the previously soldered 470 μF capacitor. The wires from the tweeter and mid-woofer should then be connected to the crossover. The crossover can next be soldered to the banana plug socket before being installed and secured inside the 3D-printed enclosure. After the front and rear panels are installed, the first speaker is assembled, and the same process can be repeated for the second speaker. Finally, both speakers can be connected to the outputs of the 2.0-channel amplifier using speaker cables, completing the DIY speaker project.

This type of DIY audio project provides a practical way to experiment with speaker components, crossover connections, amplifier matching, and custom 3D-printed enclosures. It can also be used as a hands-on project for people who want to learn more about the basic construction of two-way passive speaker systems.