Etymotic ER4SR or ER4XR
ER4SR = Reference Sound Signature // ER4XR = Bass enhanced Sound Signature
ER4SR = Reference Sound Signature // ER4XR = Bass enhanced Sound Signature
Technical Information:
Technical Information:
Impedance: 47 Ohm
Sensitivity: 115dB/mW
Amplifier requirement: No
Detachable Cable: Yes (Proprietary MMCX Connector)
Target Headphone Loudness: 110,0 dB Sound Pressure Level
Target Headphone Loudness: 110,0 dB Sound Pressure Level
Power Required: 0,32 Milliwatts
Voltage Required: 0,1219 Volts
Current Required: 2,59 milliamps
Frequency response comparison made possible by /u/MathiasBoegebjerg
Frequency response comparison made possible by /u/MathiasBoegebjerg