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The RD4037-01 is a 40mm headphone speaker unit built for professional audio performance. It features a composite PU+PEEK+LCP diaphragm and NdFeB magnets for high SPL and low distortion. Ideal for high-fidelity headphones requiring powerful, clear, and precise sound.
| Specification | Details |
|---|---|
| Model | RD4037-01 |
| Driver Size | 40mm |
| Impedance | 32Ω ±15% @ 1kHz |
| Sound Pressure Level (SPL) | 131 ±2dB @ 1kHz (179mVrms) |
| Resonance Frequency | 115Hz ±20% (Free Air) |
| Frequency Response | Shown in Figure 4 (Wideband, 50Hz–8kHz tested) |
| Total Harmonic Distortion (THD) | ≤3% (50Hz–8kHz @ 1mW) |
| Rated Power | 20mW |
| Maximum Power (Short Term) | 30mW |
| Diaphragm Material | PU + PEEK + LCP (Transparent + White) |
| Magnet Type | NdFeB (Neodymium, Dual Magnet) |
| Voice Coil | Copper-Clad Aluminum |
| Polarity | Marked "+" with colored pen; membrane moves forward with correct polarity |
| Operating Temperature | -10°C to +65°C |
| Storage Temperature | -10°C to +65°C |
| Net Weight | Approx. 26.8g |
| Packaging | 40 pcs/tray, 13 trays/carton (520 pcs total) |
| Environmental Tests | Load test (96h), Humidity, Temperature cycle, Drop test, Salt spray (48h), Vibration, Terminal strength |
SpeakerDriver™
by Cockatwo Private Limited
CIN: U62013RJ2023PTC091507
Manufacturing Unit: Yongsheng Industrial Park 523510, Dongshan, Qishi, Dongguan, China