earHero...work or play making your active lifestyle more safe!

The World’s Safest Earpiece...total sound awareness

1. This specification applies to the balanced armature type electromagnetic receiver RBB-04D2-PS

  1. This product is RoHS directive Compliant.


2. Environmental Condition

  1. Test Condition - Temperature 20 - 25°C, Relative Humidity 40 - 60%
  2. Operating Condition - Temperature 10 - 40°C, Relative Humidity 20 - 90%
  3. Storage Condition - Temperature -40 - 63°C, Relative Humidity 20 - 95%


3. General Specifications

  1. Sensitivity - 103.5±3dB, 0dB = 20μPa at 1kHz
  2. Relative Sensitivity - 100Hz : -4.0 - +2.0dB F1 peak: +6.0 - +12.0dB F2 peak: -1.0 - +5.0dB, Relative to 1kHz Sensitivity
  3. Resonance Frequency - F1 peak: 2100 - 2500Hz, F2 peak: 4500 - 5000Hz
  4. Total Harmonic Distortion - 10% MAX at 100Hz, F1/3, F1/2
  5. Impedance - 15.5±1.8 ohms at 1kHz
  6. DC Resistance - 12.8±1.5 ohms
  7. Isolation - 10 Mohms Min
  8. External Size - 4.3 x 5.6 x 2.8 mm
  9. Mass - ≤0.27 g


4. Reliability Specifications - The maximum sensitivity to be within ±3dB of initial maximum sensitivity after 2 hours of conditioning at Test Conditions. However, for high temperature and high humidity preservation within ±6dB.

  1. High Temperature Preservation - Exposure to 63° C for 72 hours
  2. Low Temperature Preservation Exposure to -40° C for 72 hours
  3. High Temperature and High Humidity Preservation - Exposure to 63° C 95% RH for 100 hours
  4. Temperature Cycle Test – -40° C (30min) 10 cycles
  5. Vibration Test – 10~200~10 HZ Sine wave, Sweep 15 min, Exceleration 49 m/s² (5G) X, Y, Z 3 directions, 2 Hrs., Total 6 Hrs.
  6. Mechanical Shock Test – half-sine Pulse, 29420m/s² (3000G), 210μsec X, Y, Z, 3 directions, 1 time each, Total 3 Pulses
  7. Operational Life Test – 25± 10°C, Operating Voltage 0.124Vrms, 1kHz Input, 100 hours
  8. Life Test at F1 – 25± 10°C, Operating Voltage 0.124Vrms, 2.3kHz Input, 24 hours


5. Connection via 3.5mm 3 pole stereo male jack

Measuring Conditions - Acoustic loading: 1mm x 10mm tubing into a cavity 2cc coupler(HA-1) Electrical Conditions: Input = 0.124Vr