Overview The Shure KSE1200 is a premium electrostatic earphone system combining single-driver electrostatic Sound Isolating earphones with a dedicated DAC/amplifier. Electrostatic technology delivers an unmatched level of detail, clarity, and transient response that conventional dynamic and balanced-armature drivers cannot achieve — reproducing audio with near-zero distortion across the full frequency spectrum. Key Features Electrostatic technology: Class-leading clarity, detail retrieval, and transient accuracy unmatched by dynamic or balanced-armature designs Dedicated DAC/Amplifier (SHA900): High-voltage bias supply with built-in DAC for pure digital-to-analog conversion 4-band parametric EQ: Adjustable via the amplifier for personalized sound tuning Near-zero distortion: THD below 0.01% for transparent, reference-grade audio Specifications Driver type: Single electrostatic MicroDriver Frequency response: 10 Hz – 50,000 Hz Sensitivity: 102 dB SPL/mW Impedance: N/A (electrostatic — requires dedicated amplifier) THD: < 0.01% (1 kHz) Noise isolation: Up to 37 dB DAC resolution: Up to 24-bit / 96 kHz Amplifier output: Electrostatic bias voltage Amplifier battery: Rechargeable Li-Ion, approximately 12 hours runtime Connector (earphone): MMCX (detachable) Connector (amplifier input): 3.5 mm analog + Micro-USB digital Earphone weight: 23 g (0.81 oz) without cable Amplifier dimensions: 78.5 × 25.3 × 130 mm (3.09 × 1.0 × 5.12 in) Amplifier weight: 157 g (5.5 oz) In the Box KSE1200 electrostatic earphones SHA900 electrostatic DAC/amplifier Detachable MMCX earphone cable Micro-USB charging cable 3.5 mm interconnect cable Micro-USB to Lightning adapter cable Fit kit (silicone and foam sleeves, S/M/L) 1/4" adapter Airline adapter Premium carrying case