The Penny Box DIY Speaker Kit

The Penny Box DIY Kit is a high-performance, portable powerhouse. We provide the partially assembled electronics engine, including premium drivers, hand-built battery pack, wire harnesses and all needed hardware, and you print the tuned enclosure using our included files.

The Specs

At the core of this build is a high-powered Class-D Amplifier with DSP tuning, delivering 100 watts of total power. This isn’t just “loud”, it’s clean.

The Low End: We’ve equipped this kit with a premium 5.25″ Woofer featuring a massive 9.5mm of Xmax. This extreme excursion allows the driver to move more air than almost any other speaker in its class, resulting in physical, chest-thumping bass.
The Mids – Highs: Paired with an ultra-linear Full-Range Driver, you’ll experience a transparent soundstage with highs that remain undistorted all the way up to 20,000Hz.

Acoustics Meets 3D Innovation

The enclosure is more than just a box, it’s a precision instrument.

Custom-Ported Design: The printable cabinet features a mathematically optimized port tuned to an incredible 40Hz. This tuning allows the 5.25″ driver to reach deep into the bass frequencies usually reserved for much larger home theater setups.
Portability: The build design features an integrated handle built directly into the enclosure.

The Power Station (Hand-Built & Pre-Wired)

We have done the heavy lifting so you don’t have to. The electrical system comes partially pre-assembled, soldered, and ready to install.

The Penny Box is designed to be your power source, wherever you go.

6,000mAh Battery: Enjoy hours of playback at high volumes with our high-capacity lithium-ion Battery.
Bi-Directional Fast Charging: Equipped with a modern USB-C interface, you can fast-charge the speaker in record time. But it doesn’t stop there, the bi-directional circuitry allows you to use the Penny Box as a power bank to fast-charge your smartphone, tablet, or camera on the fly.

What’s In The Box?

All Drivers
Pre-tuned Amplifier
Custom 6,000mAh Battery Pack (Spot-welded)
Wiring harnesses and connectors
The “Penny Box” Brass Badge
All required screws, feet, and mounting hardware
Digital STL Files for 3D Printing the Case (downloadable before shipment)

What’s Not Included?

3 kg of filament for main body, baffle and internal components.
.3 kg of filament for grill.

⚠️ Printer Requirement: This is a large, high-volume enclosure. You will need a 3D printer with a minimum build volume of 256mm x 256mm (e.g., Bambu Lab X1/P1 series, Creality K1 Max, or Prusa XL). It will not fit on standard 220mm printers (Ender 3/Prusa MK4). Not recommended to print on open air 3D printers due to warpage.

Pre-order Kits

Penny Box Speaker Kit Pre-order

Penny Box Audio