Reference class, open back, dynamic headphones with flat frequency response for binaural/immersive mixing made in the EU. The new 1.3 version now includes USC calibration.SPEAKERHand picked and left / more→right matched transducers delivering accuracy and instrument separation. (+/-1dB SPL tolerance, pink noise, range 100Hz-10kHz in free field*)50 mm, PET 25u membrane, 2 layered coil, 50 ohms,Dynamic Neodymium speaker with 108dBSPL @ 0 dBu RMS 1KHz 30ohm output that makes them work with smart devices too.Replaceable using home tools.ACOUSTICSReplaceable earpads with outer diameter of 95 mm(3.75inch), inner diameter of 57.5mm(2.25inch) and depth of 20mm(0.8inch), +/-2.55mm.Perforated hybrid artificial …