Features:
The EST unit, Balanced Armature Unit and the Dynamic unit are responsible for high frequency, intermediate frequency and low frequency, respectively.
Exquisite craftsmanship, handmade
1DD 4BA 2EST
Sonion composite electrostatic drive unit

Spec:

Sensitivity: 104dB/100mV
Impedance: 5Ω@1kHz
Frequency response range: 10-80000Hz
Distortion: THD≤1%, 1MD≤1%