Build Kit
Build Kit
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Everything you need to build the Bookshelf Speaker in a single box. All you have to do is 3D print the files and follow our Assembly Guide.
What's in the box?
What's in the box?
- Custom circuit board
- 4-inch woofer
- Silk dome tweeter
- Potentiometer
- 45W USBC power adapter
- Braided USBC Cable (2m)
- 4 Rubber feet (plus a spare)
- 14 Torx screws (plus a spare)
- A Torx key and mini wrench
- Connection Cables
Technical Specifications
Technical Specifications
- 3.5mm AUX Input
- 3.5mm AUX output for multi-speaker linking
- USBC power input (45W)
- Mono / Left / Right toggle switch
- ESP32 expansion port
- integrated DSP with custom software
- integrated Class D amplifier
- 43Hz - 20Khz (±3db @ 75dB SPL)
Manuals and Resources
Manuals and Resources
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Assemble in 10 minutes
No glue, soldering, sanding, coding, or specialized knowledge required. Assembly takes under ten minutes, and swapping parts takes less than five.
If you can put together IKEA or LEGO, you can build this.
Really good sound
This speaker uses a 4-inch woofer for deep, accurate bass down to 43 Hz, and a silk-dome tweeter for clear highs up to 20 kHz (±3 dB @ 75 dB SPL). That’s impressive for any high-end speaker, especially one this compact.
An onboard digital signal processor (DSP) maximizes sound quality through a range of filters and algorithms, including crossover design, dynamic EQ, time alignment, driver protection, and mor
Stereo, Mono, or both
On the back are two 3.5 mm audio jacks, one for audio input and one for audio output. You can connect the audio output of one speaker to the audio input of another, then use the rear switch to select Right channel, Left channel, or Mono.
This makes multi-speaker setups simple, solid, and lag-free.
Add Bluetooth and Airplay with ESP32
The circuit board includes an expansion port for ESP32 development boards, allowing audio input over I²S. This makes it easy to add Bluetooth or AirPlay using open-source software such as Squeezelite. It also opens the door to voice assistants, multi-room setups, microphones, buttons, sensors, and more
A new approach to Loudspeaker Engineering
3D printing lets us completely rethink how a speaker is built.
Traditional enclosures rely on six separate wood or MDF panels glued together, occasionally with internal bracing to improve rigidity. Our approach replaces that with a single 3D-printed shell reinforced by an open-cell lattice structure.
The lattice does two primary things. First, it dramatically improves sound quality. By tying all sides of the enclosure together, it creates extremely stiff panels that minimize resonance (unwanted sound vibrations). Because we can precisely tune its geometry, we achieve this while preserving over 92% of the internal air volume, ensuring enough volume and compliance for the woofer to produce deep bass down to 43 Hz.
Second, the lattice simplifies production. It acts like a built-in infill structure, supporting each printed layer so the entire enclosure can be printed as one continuous piece. This streamlines the build process by eliminating adhesives and joining, and results in a reliably airtight, acoustically optimized enclosure.
Frequently Asked Questions
Can I modify/hack it?
100%. We encourage people to try new things, modify the 3D print files, edit the DSP software, add an ESP32, go wild. And please share it with us if you do!
Do I need any other tools, materials, or technical experience?
No. Absolutely everything is included. You just need the 3D printed files.
Can I build them and sell them?
Yes! There are no restrictions on selling completed speakers. However distributing or reselling the print files is prohibited.
Is this a certified product? (FCC, CE, UL, etc.)
All included parts are built from certified components and run on low-voltage DC power, and we have completed extensive thermal and reliability testing. But because this is a DIY kit, the completed unit once assembled can't be officially certified - similar to most open-source electronics.