Voxalon ’26 – Modular Retro Bluetooth Speaker
Print Profile(2)
Bill of Materials
- Acoustic damping x 1: optional - for the inside - different types can be used
- Speaker cloth x 1: optional - only if using textile / cloth front plate instead of the printed one
- Passive radiator / membrane x 1: optional - only if using open backplate (currently in testing)
- Full-range speakers ≤ 3 inch x 1: Reference: 2× Visaton FR7/4 or FR8. Other small full range drivers may work if the matching speaker mounting plate is used.
- USB-C PD power supply x 1: in case you dont have one lying around
- Bluetooth amplifier board x 1: ZK-1001B board. Design currently only fits this board. other boards not tested
- USB-C PD Trigger Module x 1: Set to 12 V and verify with a multimeter before connecting the amplifier.
Description
Description
Voxalon ’26 is the successor to Voxalon ’25 and improves the original concept with a larger enclosure, a dual-speaker layout, USB-C powered electronics, and a more controlled acoustic chamber.
The design is inspired by classic compact table radios and the clean functional spirit of the Braun SK25. The goal was to create a printable Bluetooth speaker that looks timeless, assembles cleanly, and sounds more intentional than a simple open plastic box.
This version uses two small full-range drivers and a sealed internal cabinet layout. The back plate can be printed either as a fully closed version or as a version with a cutout for a passive radiator.
The front can be built with either the perforated printed grille or the open front frame for speaker cloth.
What Changed Compared to Voxalon ’25?
- Larger enclosure volume
- Two speaker drivers instead of one
- USB-C power input instead of a separate 12 V barrel power supply
- Improved closed cabinet structure
- Optional passive radiator back plate
- Two front plate options: printed grille or speaker cloth frame
- Modular speaker mounting plate for different driver options
- Optional feet; recommended for the intended upward tilt
Build Variants
Front Options
Perforated Front Plate
Use this version if you want the fully printed retro grille. Mount it in front of the speaker mounting plate using M3 screws.
Open Front Frame for Speaker Cloth
Use this version if you want a fabric-covered front. Stretch acoustically transparent speaker cloth over the frame, wrap it to the back, and clamp it between the front frame and the speaker mounting plate.
Use only acoustically transparent speaker cloth. Do not use thick cotton, felt, upholstery fabric, or leather-like materials.
Back Options
Closed Back Plate
Use this version for a fully sealed cabinet. This is the recommended standard build.
Passive Radiator Back Plate
Use this version if you want to install a passive radiator in the rear cutout. Seal the radiator carefully and keep the inside area behind it clear.
Choose one front option and one back option.
Documentation of other parts and material
Use speakers up to around 3" that fit the need for a wide frequency band
(200–20000 Hz) https://www.visaton.de/de/produkte/chassis/breitband-systeme/frs-7-4-ohm |   |
ZK 1001B Mono Amplifier Board from amazon, aliexpress or somewhere. |  |
| Passive Radiator. this is the one currently fitting the back plate (membrane version). you can make it to fit your own by using the step file and customizing the cutout |  |
| some kind of speaker cloth. dont use heavy duty cloth or anything else here. If you dont have some or dont want to buy it, just use the other front plate option |  |
| an USB-C PD trigger Module which allows you to use a USB Quick Charger to use 12V directly. They are super cheap and tiny and just “snap fit” into the backplate. |  |
Notes
- This model is intended for indoor use.
- This is a DIY electronics project. Always check voltage and polarity before connecting the amplifier.
- The enclosure should be assembled as airtight as reasonably possible, especially when using the closed back plate or passive radiator version.
- i used some AI gen Images for this project since i dont have the ability to take good photos - im just a nerd, not a photographer
- you can use some audio capacitors with 330uF or depending on your speakers to protect the speakers from unfitting frequency
- i wired the 2 FSR7/4 Speakers in series, not parallel so the 4 Ohm will add up. its bit to aggressive to wire them in parallel
Possible future updates:
- Battery version / portable speaker
- upgraded higher end amplifier
- need more feedback / gathering ideas
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Documentation (2)
License
You may create derivative works based on this object, provided that all such derivative works are published exclusively on the MakerWorld platform and include proper attribution to the original creator. You may not share, upload, host, distribute, or publish this object—or any derivative work of this object—on any other digital platform, marketplace, or distribution channel. Commercial use of this object and any derivative works is strictly prohibited. This includes, but is not limited to, selling, renting, sublicensing, or using the object in any context in which you receive monetary compensation or other financial benefits.
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