Koss introduced the PortaPro headphone back in 1984, and they've been a hit ever since. To this day, they still deliver excellent sound quality, particularly for phones in this price range.

The Porta Pro features dynamic elements that deliver exceptionally rich, deep bass and a remarkably wide frequency response to capture every nuance in your favorite movie or musical performance. The elements inside the headphones minimize mechanical distortion and ensure exceedingly accurate sound reproduction.

Oxygen free copper voice coils improve signal transmission and conduction for cleaner, clearer sound. Foam ear cushions provide an open, hear-through sound that lets you keep in touch with your surroundings and adjustable temporal pads keep the pressure off your ears. Whether you’re listening at home or on the go, the PortaPro will bring the great sound and excitement of a live performance.

Also designed for comfort, these headphones have two adjustable temporal-comfort zone pads to shift the pressure and perfectly balance the ear plates on your ear. The open-earphone ear plates are multipivoting and, together with the adjustable headband, allow for maximum comfort.

Features:

• Great frequency response, including deep bass performance
• Comfort Zone setting lets you adjust temporal pad for a comfortable, secure fit
• Collapsible for maximum portability when listening on the go
• Multipivoting ear plates and adjustable headband for added comfort

Technical Details:

• Frequency Response: 15-25,000 Hz
• Impedance: 60 ohms
• Sensitivity: 101 dB SPL
• Distortion: <0.2%
• Cord: Straight, Dual Entry, 4ft