<---->
High-clarity 12mm earphone speaker driver with 16Ω impedance, 20mW rated power, and PU + Wool Paper composite diaphragm. Designed for wired and wireless earphones requiring balanced sound, stable performance, and strong durability.
| Specification | Details |
|---|---|
| Model Number | RD1238-O77 |
| Impedance | 32Ω ±15% (1kHz, 1mW) |
| SPL | 121 ±1.5 dB (1kHz, 179 mVrms, 0dB = 20uPa, 711EAR) |
| Rated Power | 5mW |
| Max Power | 10mW |
| Resonance Frequency (F0) | 280 ±20% Hz (Free Air) |
| Diaphragm Material | PU + DN (40u + 25u) |
| Voice Coil | Ø6.6mm, 32Ω, 0.035#, 0.9H, 4F |
| Magnet | N50, 6.2 × 1.1mm (×2) |
| Net Weight | Approx. 0.9g |
| Frequency Response | 50Hz – 8kHz |
| THD | ≤2.5% (50–8kHz @ 1mW) |
| Rub & Buzz | No abnormal sound (50–3kHz sweep, 0.4V) |
| Polarity | Positive voltage → diaphragm moves forward |
| Operating Temperature | -10°C to +65°C |
| Storage Temperature | -10°C to +65°C |
| Reliability Tests | Temperature Shock, High/Low Temp, Humidity, Drop, Vibration, Aging |
| Packaging | 96 pcs/tray, 50 trays/carton (4800 pcs) |
SpeakerDriver™
by Cockatwo Private Limited
CIN: U62013RJ2023PTC091507
Manufacturing Unit: Yongsheng Industrial Park 523510, Dongshan, Qishi, Dongguan, China