RD4005-16W110 | 40mm 32Ω Speaker Unit
This is a 40mm 32Ω speaker unit designed for earphones, featuring high SPL, low distortion, and reliability under temperature, humidity, and vibration tests.
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- Designed By: SpeakerDriver
- Product ID: RD4005-16W110
Technical
Specifications
| Specification | Details |
|---|---|
| Model Number | RD4005-16W110 |
| Size | 40mm Speaker Driver |
| Impedance | 32Ω ±15% @1kHz, 1mW |
| Sensitivity (SPL) | 116 ±3 dB @1kHz, 179mVrms with 318EAR |
| Resonance Frequency (Fo) | 130Hz ±20% (Free Air) |
| Frequency Response | As per Figure 4 (1mW/179mVrms with 318EAR) |
| Rated Power | 10mW |
| Maximum Power | 30mW (Short Term) |
| THD | ≤3% @1mW (80Hz–8kHz) |
| Rub & Buzz | No audible noise (50Hz–3kHz @0.56Vrms) |
| Polarity | DC “+” → diaphragm forward |
| Net Weight | Approx. 12.2g |
| Operating Temp. | -20°C to +65°C |
| Storage Temp. | -20°C to +65°C |
| Reliability Tests |
• Load test: 96h white noise @0.56V • Humidity test: 40°C, 90–95%RH, 48h • Drop test: 1.0m, 6 cycles • Temperature cycle: -30°C ↔ 65°C, 6 cycles • High temp: +65°C, 48h • Low temp: -20°C, 48h • Vibration: 10–55Hz, ≥3.5mm, 2h/axis |
| Material Composition |
Frame: ABS Diaphragm: Silk Yoke/Plate: SPCC Magnet: NdFeB Voice Coil: Copper PCB: Fiber Board Acoustic Paper + Wiring Set Included |
| Packaging |
200 pcs/tray 10 trays/carton (2000 pcs) Polyfoam protective packing |