The Westone W10 features a full-range, single balanced-armature driver with 122 dB SPL @ 1mW sensitivity, 20Hz – 16kHz frequency response, and an impedance of 19 ohms @ 1kHz, 25dB Passive Noise Attenuation
The Westone W20 features a full-range, dual balanced-armature driver with 117 dB SPL @ 1mW sensitivity, 20Hz – 18kHz frequency response, and an impedance of 33 ohms @ 1kHz, 25dB Passive Noise Attenuation