Transducer type:  4 precision balanced armature SPD duplex driver 
Transducer configuration: 2-low, 2-mid, 2-high
Quad Bore Design
Integrated 6-way emulated passive crossover
Hypoallergenic, hard acrylic shells
Impedance: 22 Ohms Sensitivity: +/- 115dB SPL @ 1mW
Freq. Response: 10Hz – 20 kHz
Noise Isolation: -18dB with RKTECH™ Auto Module