Description
Overview
Eartone V1 was an ambitious first hybrid IEM, and it’s archived honestly: the shell printing and assembly came together, but the acoustic tuning and the universal fit didn’t reach a level worth wearing daily.
It’s kept here as a reference — the shell-modeling and assembly steps are sound, and the known issues are a useful map for a V2.
Lessons for V2
- Damp the BA sound tube to kill the 7 kHz resonance
- Go custom-fit, or accept that universal shells won’t seal for everyone
- Measure on a coupler early — the ear is not a reliable tuning instrument
Specifications
| Configuration | 1 DD + 1 BA hybrid |
|---|---|
| Shell | Resin SLA printed |
| Crossover | Passive single cap on BA |
|---|---|
| Coupler | IEC 60318-4 measured |
Bill of Materials
| Component | Qty | Unit | Unit Price | Total | Notes | Buy |
|---|---|---|---|---|---|---|
| Dynamic driver 10 mm | 2 | €9.00 | €18.00 | |||
| Balanced armature | 2 | €14.00 | €28.00 | |||
| Skin-safe SLA resin | 1 | €35.00 | €35.00 | |||
| MMCX sockets + cable | 1 | €18.00 | €18.00 |
Build Guide
Scan and model the shell
8 h- Keep the bass vent area generous — too small and the dynamic driver sounds choked.
Print and cure
1 dayAssemble drivers and crossover
4 hMeasure and evaluate
Known Issues
- BA integration peak Major
An untamed resonance around 7 kHz from the BA sound tube makes the top end splashy.
Workaround: A series resistor helps but costs sensitivity; a damped tube is the real fix. - Universal fit Minor
The universal shell seals well for some ears and not at all for others.
Discussion
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