The AKG N90Q is optimized to give the most accurate sound reproduction using Trunote technology, consisting of an automatic sound calibration using two microphones in each ear cup to measure the individual user’s ear shape and size so that the target frequency curve is met for each individual user. The patented dual density ear cushion aids in reducing reflections inside the acoustic chamber with the rear of the ear cushion thicker than the front of the ear cushion. A 7 degree tilt is included on the baffle for better alignment of the transducer to the ear. Novel pistonic-motion 52 mm transducer using a special Japanese paper membrane, coupled.