Koss Porta Pro Headphones with Microphone/volume control

Actually there is no better icon of headphone than this .. their unique spring headclamp system is as unique as Desmodromic Valve gear ... The Bass response is simply magnificent with a perfect balance of pressure and comfort ... 

I really rate these for their stickyness to head and their bass response. The unique sprung pressure padson the side hold the phone gently but firmly and resistant to epileptic level head movements ... At the same time the gentle but firm derived pressure pressure of the ear pads allows for an local micro pressure environment that gives bass like nothing else in portable head phones. 

Lifetime Warranty 

From the manufacturer... 

"Koss Porta Pro stereophones high quality sound sets a sound performance standard for portable listening. First introduced in 1984, this high quality portable stereophone set performance and comfort standards for personal listening worldwide. 

Koss has preserved the original design and performance that made the Porta Pro a portable music icon. Designed for those with refined musical acuity, the Porta Pro continues to be the most requested headphone at koss. 

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 Porta Pro will bring the great sound and excitement of a live performance. 

Built to last, the Porta Pro is covered under Koss’ Limited Lifetime Warranty - the only warranty of its kind in the stereophone industry." 

Specification Chart 

PortaPro 

• Frequency Response 15-25,000 Hz
• Impedance 60 ohms
• Sensitivity 101 dB SPL