A micro speaker exclusively for wearables, IoT, and smart homes, with a thickness of 4.45 mm, 8 ohms, and SPL of 90 dB. A 10π class ultra-slim new product unveiled by Unison Audio Co., Ltd., a tenant of Bucheon Techno Park, in May 2026.
Unison Audio Co., Ltd., a resident company of Bucheon Techno Park, unveiled a new product, 10π-class ultra-slim micro speaker U1808S36 targeting the wearable, IoT, and smart home markets. It is an acoustic component that contains stable sound performance of 8Ω·SPL 90dB in a compact form factor of 18mm in diameter and 4.45mm in thickness.
📌 Key specifications at a glance
- Product name: U1808S36 Micro Speaker
- Manufacturer: Unison Audio Co., Ltd. Ltd.)
- Form: Round, 10π class ultra-slim
- External dimensions: Diameter (Ø) 18mm × Thickness 4.45mm
- Output sound pressure (SPL): 90dB ± 3dB (0.1W / 0.1m Standard)
- Impedance: 8Ω ± 15%
- Resonant Frequency: 780Hz ± 156Hz
- Rated Input: 0.8W (Max 1.0W)
- Weight: 2.6g ± 0.2g
- Acoustic Outlet: Ø12.7mm
- Published: May 2026
🔧 Detailed Specifications — Data Sheet for Engineers
| Item | Value | Unit / Condition |
|---|---|---|
| Shape | Circular | 10π class |
| outside | Ø 18 | mm |
| Thickness | 4.45 | mm (ultra slim) |
| Impedance | 8 ± 15% | Ω |
| Sound pressure SPL | 90 ± 3 | dB (0.1W/0.1m) |
| Resonant Frequency | 780 ± 156 | Hz |
| Rated Input | 0.8 / 1.0 | W (Rated / Max) |
| 중량 | 2.6 ± 0.2 | g |
| Acoustics Spinneret | Ø 12.7 | mm |
📈 Frequency response characteristics
Resonant frequency 780Hz is the fundamental frequency of the human voice It is designed to sufficiently cover the band (85 to 255 Hz) while ensuring audibility of general notification sounds, UI sound effects, and voice guides. The tolerance of ±156 Hz ensures consistent quality in mass production.
🎯 Applications — Where is it used
The ultra-slim structure with a thickness of 4.45mm is a decisive differentiator in space-constrained electronics.
- Wearable devices — Wrist-worn devices such as smartwatches, fitness bands, hearing aids, etc.
- IoT devices — Smart door locks, security sensors, environmental monitoring terminals
- Smart home devices — Voice assistants, home appliance notification sounds, intercoms
- Portable devices — Walkie-talkies, industrial handhelds, medical devices
- Voice guidance systems — Kiosks, ATMs, guidance Terminal
- Embedded acoustic module — All applications in constrained environments less than 5mm thick
💡 Why is this specification important
1. Thickness 4.45mm — Form factor competitiveness
In the wearable market, a 1mm difference in thickness determines design freedom. U1808S36 can be directly applied to ultra-slim designs requiring a thickness of 5 mm or less.
2. 8Ω Impedance — Standards Compatibility
Most audio IC outputs (Class D amplifiers, etc.) assume the 8Ω standard, allowing for immediate integration without separate matching circuitry.
3. 90 dB SPL — Obtain the threshold of hearing
The sound pressure level that can be clearly heard in an indoor environment. It is sufficient for functional sounds such as notification sounds, voice guides, and UI feedback.
4. 0.8W rating — battery-friendly
The low-power design allows for long-term use even in mobile battery environments. 1.0W maximum output covers alarm sounds that require instantaneous impact.
🏢 Manufacturer — Unison Acoustic Co., Ltd.
Unison Audio Co., Ltd. is a specialized manufacturer of acoustic components located in Bucheon Techno Park Complex. We specialize in developing and producing small acoustic components such as micro speakers, receivers, piezoelectric buzzers, and transducers, and supply precision acoustic solutions to electronic product OEMs and ODMs.
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🔗 Related materials
- 🌟 BTPA Showcase — Unison Acoustic U1808S36 Detail Page
- 📂 View all posts in New Products & New Technology Category
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This post May 14, 2026 It was written based on information on Unison Audio Co., Ltd.'s U1808S36 new product registered in the Bucheon Techno Park Development Association (BTPA) showcase. For specifications, availability, and OEM inquiries, please refer to the BTPA integrated directory or Unison Audio Co., Ltd.’s official channel.