Reference Headphones Circumaural, Closed-back design, Dynamic, Frequency range: 5 - 45,000 Hz, Imepdance: 25 Ohm, Sensitivity: 100 dB/mW, Maximum input: 1,800 mW, Driver: 50 mm neodymium driver with “Bio-Dynamic”...

"Studio headphones Closed back, Circumaural, Impedance: 36 Ohm, Sound pressure: 112 dB SPL / V, Converter: 53 mm, 1.5 Tesla magnetic-system, Ultralight two-layer voice coil, Transmission range: 5 - 54,000 Hz, Rated load..."

Headphone Improved headband, Open, Circum-aural, 106 mm Driver, Neodymium magnets, Impedance: 20 Ohms, Transmission range: 5 - 20,000 Hz, Boundary sound pressure level: 130 dB, Leather elements, Includes1.9 m cable...

Modelling Headphones Open planar magnetic headphones with VSX Platinum modelling software, Combination of open headphone design and binaural spatial imaging via software, Tuned planar magnetic drivers with 1-micron...

HEDDphone D1 HEDDphone D1 Studio Headphones Over-ear, Open-back design, Dynamic drivers with Thin-Ply Carbon Diaphragm (TPCD), a high-strength composite material that controls resonance and enables fast transients...