- by Ayushi Agrawal
- 2025-05-08 09:30:37
1712 Oval Speaker Driver Unit for OWS (Open Wearable Stereo)
The RB-SPE1712-N08U16 is an oval-shaped, or runway-type, speaker driver specifically engineered for Open Wearable Stereo (OWS) wireless earphones. Known as air-conduction headphones, these devices deliver audio without directly sealing into the ear canal. The speaker driver must therefore produce higher output power and SPL to compensate for the 5–15mm air gap from the ear.
Key Specifications of RB-SPE1712-N08U16
| Specification | Details |
|---|---|
| Model | RB-SPE1712-N08U16 |
| Dimensions | 17L x 12W x 4.2T mm |
| Weight | 6g |
| Impedance | 16 ± 15% Ohm @ 1kHz, 1V |
| Rated / Max Power | 20mW / 30mW |
| Resonance Frequency (FO) | 200 ± 20% Hz |
| SPL (1mW) | 119 ± 3dB |
| Frequency Response | 20Hz – 20kHz |
| Distortion | ≤ 3% |
| Magnet Material | Nd-Fe-B |
| Magnet Size | 11 x 6 x 1.2mm |
| Polarity | Diaphragm moves forward with "+" terminal |
| Operating Temperature | -20°C to +55°C |
| Storage Temperature | -25°C to +65°C |
Why Oval Speakers for OWS Earphones?
- Space-Efficient Design: The 17x12mm runway shape enables a more compact integration into modern earphone housings.
- Improved Magnetic Circuit: High-performance NdFeB magnets boost magnetic field strength, improving overall sound quality.
- Advanced Diaphragm: Utilizes PU+TI composite with mid-paste bonding for high rebound, fast transient response, and a powerful soundstage.
- Enhanced Bass Reproduction: Despite a high FO, the oval design supports improved bass output, addressing a common OWS challenge.
Reliability and Environmental Testing
- White noise durability test at 0.10W input for 96 hours
- Thermal aging: 96 hours at +65±3°C and -25±3°C
- Humidity resistance: 96 hours at +40±2°C, 90–95% RH
- Vibration test: 30 ±15 Hz @ 1.5mm amplitude, 2 hours/axis
- Drop test: 1m free fall, 11 times on concrete
- Thermal cycle test: 5 cycles between 25°C and 65°C
Conclusion
The RB-SPE1712-N08U16 speaker unit combines a unique oval shape with advanced materials and performance engineering. Its high SPL, improved transient response, and robust environmental resistance make it a prime solution for OEMs developing OWS and air-conduction wearable audio devices.
