Koss Porta Pro Classic On-ear Headphones, Black

The Koss Porta Pro Classic is a set of on-ear, wired headphones designed for portable audio listening. They feature an open acoustic system intended to produce a wide stereo image, with a frequency response of 15 Hz to 25,000 Hz. The audio is delivered by dynamic elements composed of Mylar with oxygen-free copper voice coils. For comfort during extended use, the lightweight 60-gram frame incorporates foam ear cushions and an adjustable headband. A standard 3.5 mm connector on a 1.2-meter cable provides compatibility with a range of audio devices.

The mechanical design emphasizes portability, with a foldable structure that allows the headphones to be stored compactly in the included carrying case. These headphones are engineered specifically for music listening, with a nominal impedance of 60 ohms and a sensitivity rating of 101 dB. This model does not integrate a microphone, inline controls, or active noise cancellation technology. The focus remains on a direct, unaltered connection between the audio source and the listener, providing a functional and straightforward listening device.

• Wearing style: On-ear with headband
• Connectivity: Wired via 1.2 m cable with 3.5 mm plug
• Acoustic system: Open
• Frequency response: 15-25,000 Hz
• Impedance: 60 ohms
• Weight: 60 g
• Structure: Foldable for transport
• Included accessories: Carrying case