SLAM Technology Symmetric Linear Acoustic Modulator — Tuned to enhance bass frequencies and lower distortion – Maintains optimal pressure distribution on the diaphragm – Patent pending. SLAM gives CRBN2 the most life-like physical bass of any electrostatic headphone, with natural detail presentation and immersive stereo imaging. Precision Crafted Each CRBN2 is hand-assembled and tested in California by electrostatic specialists, finished to the utmost standards. Luxuriously Built CRBN² is engineered from materials of the highest quality: magnesium, carbon fiber, premium leather, stainless steel, and polymer acetate. High Voltage CRBN2 requires an amplifier with electrostatic output using 580VDC bias, also known as “Stax Pro Bias.” A number of suitable amplifiers on the market from a variety of brands will drive CRBN2 well, click here for more details. Specifications Style Over-ear, open-back Transducer type Push-pull electrostatic Functional bias voltage 580 VDC Stax Pro Bias Electrostatic capacitance 100 pF (including cable) Diaphragm type Ultra-thin polyimide film with infused carbon nanotubes Diaphragm management SLAM Technology for earcup pressure relief and bass enhancement Transducer size 120mm x 90mm Frequency response 10Hz - 40kHz Maximum SPL >120dB THD