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Passive Acoustic Amplifying Phone Stand
6/8/2026 Parametric
Passive Acoustic Amplifying Phone Stand
An ergonomic tilted desk stand engineered with dual exponential horn ducts that passively amplify bottom-firing smartphone speakers by +6dB without electronics or batteries. Includes a pass-through charging channel.
⚙️ Key Parametric Variables
| Parameter | Default | Range | Description |
|---|---|---|---|
inner_w | 170mm | 60mm - 260mm | Cradle width (sized for Fold series, tablets, or standard phones). |
phone_thickness | 14mm | 8mm - 25mm | Pocket depth accommodating thick protective phone cases. |
tilt_angle | 68° | 45° - 85° | Viewing angle optimized for desk-level video calls. |
acoustic_flare | 18mm | 10mm - 35mm | Output port horn radius for passive frequency tuning. |
cable_channel | true | boolean | Rear routing slot for USB-C and Lightning charging cables. |
🖨️ 3D Printing Recommendations
- Material: PLA, PLA-CF (Carbon Fiber), or PETG.
- Layer Height:
0.20mm. - Infill:
20% - 25% GyroidorCubic(higher density provides better acoustic resonance). - Supports: None required (acoustic horn ramps are drafted at self-supporting 45° angles).
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All STL files are free to download and access. Donations are completely optional. All money given helps AHM Labs R&D provide more tools and open-source software.