Compare Koss Pro3AA Headphones to Koss PRO4AA Headphones

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. Less