Design
| Headset type |
Binaural |
| Wearing style |
Head-band |
Headphones
| Headphone frequency |
10 - 25000 Hz |
| Ear coupling |
Circumaural |
| Headphone sensitivity |
95 dB |
| Total Harmonic Distortion (THD) |
0.1% |
| Impedance |
250 Ω |
Koss Pro4AAT Stereophone
Fresh Take on the Long-Time Industry Standard
This full-size professional quality stereophone has long been the headphone of choice for broadcast and recording professionals whose careers demand reliable equipment and superior performance. As the first dynamic stereophone to deliver true full frequency, high-fidelity performance, the PRO4AA set the standard when it was introduced in its original form in 1970. In the late 1980s after long service, it was retired and replaced by a newer model. Customers clamored for its return, and by 1988 it was brought back by popular demand. Since then, though we've incorporated performance-enhancing technology and updated its style, the essence of the PRO4AA remains unchanged and it continues to set the standard for performance and reliability today.
The PRO4AA Titanium features dynamic elements for an exceptionally wide frequency response from 10-25,000 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. For times when every note must be captured and no sound allowed to leak through, closed Pneumalite cushions form a positive, comfortable seal around the ears, maximizing bass frequencies and isolating the listener from ambient noise.
Designed for frequent use over extended periods, the PRO4AAT's durable steel and rubber headband is generously padded. Adjustable slide bars ensure a snug fit, also critical for hearing every note and keeping unwanted sounds out. The heavy-duty, single-entry eight-foot coiled cord affords ample flexibility of movement. A 3.5mm (1/8") plug and a 6.3mm (¼") adapter, both with gold-flashing, are included.
Whether you are a sound professional or simply love music, the PRO4AAT will deliver excellent isolation, accurate sound reproduction, and the excitement of a live performance to your recording. Built to last, the PRO4AAT is covered under Koss’ Limited Lifetime Warranty - the only warranty of its kind in the stereophone industry.
