Delivering superb sound with a nod toward comfort, the PRO3AA Titanium is a professional quality stereophone that follows in the tradition of the broadcast and recording industry standard PRO4AA. During long recording and listening sessions wearers will appreciate the PRO3AA's ear-coddling leatherette ear cushions and its overall lighter-weight design just half the weight of the PRO4AA. With a crisp treble, warm natural mid-range, and taut bass, the PRO3AA delivers accurate sound reproduction that won't disappoint.The PRO3AA Titanium features dynamic elements for a wide frequency response from 15-20,000 Hz. A 2 mil. titanium coating on its diaphragms increases the rigidity of the element, minimizing mechanical distortion and ensuring exceedingly accurate sound reproduction. One-inch (25.4 mm) diameter oxygen-free copper voice coils improve signal transmission and conduction for cleaner, clearer sound. To capture every note and prevent sound from leaking through, closed leatherette earcushions form a comfortable seal around the ears, enhancing bass frequencies and isolating the listener from ambient noise.Designed for frequent use over extended periods, the PRO3AA's durable steel and rubber headband is padded and features adjustable slide bars to ensure a snug fit --critical for hearing every note and keeping unwanted sounds out. The PRO3AA's earcups fold up for protective storage and portability. A heavy-duty, single-entry eight-foot straight cord affords ample flexibility of movement. A 3.5 mm (1/8) plug and a 6.3 mm ( ) screw-on type adapter, both with gold-flashing, are included.With its precise sound reproduction and excellent isolation capabilities, sound professionals and music lovers alike will laud the outstanding performance and comfort of the PRO3AA.Built to last, the Pro3AAT is covered by Koss is covered by Koss' No*Questions*Asked Lifetime Warranty.