Наушники — Koss Porta Pro Wireless

The Porta Pro Wireless is a Bluetooth on-ear headphone from Koss that builds a battery, a radio receiver and on-board controls into the collapsible Porta Pro frame. Koss first introduced the Porta Pro in 1984 as a portable alternative to larger headphones, and this version keeps the adjustable temporal pads and open-air cushions while dropping the fixed cable. Koss announced it on September 16, 2024 to mark the 40th anniversary of the Porta Pro, with US availability from that day at USD 99.99. A patent-pending dual steel headband carries the audio signals between the two sides, and the packaging uses over 50 percent less material than that of the Porta Pro Classic.

Key specs that matter

Koss lists a frequency response of 15 to 25,000 Hz, an impedance of 60 ohms and a sensitivity of 101 dB SPL. The wireless link uses Bluetooth 5.2. A rechargeable lithium-ion battery is rated for 20 hours or more of playback, and it charges through a USB-C port. The earpieces use open-air cushions with hear-through, so outside sound remains audible. Koss fits dynamic drivers with coils of oxygen-free copper.

Engineering and use context

An integrated microphone and controls handle music playback and call management, and Koss notes the microphone can also be used for audio recording. The USB-C port doubles as an analog audio input for times when the battery runs low, so the supplied USB-C to 3.5 mm cord connects the headphone to sources without Bluetooth. The box also holds a USB-C to USB-A charging cord and a hard shell carrying case. The model joins a Koss range that also covers wired headphones, computer headsets, active noise canceling models and Bluetooth speakers. The frame collapses for storage, and the temporal pads adjust for a secure fit. Unlike the Limited Lifetime Warranty on the wired Porta Pro models, Koss covers the Porta Pro Wireless with a 1-Year Limited Warranty, reflecting the battery and electronics inside.

Pairing

Phones, tablets and computers link to the Porta Pro Wireless over Bluetooth without an external amplifier. For wired listening from a wired output, the pass-through cord carries the analog signal to the drivers, and the impedance and sensitivity ratings suit the headphone outputs of portable devices.

Alternatives

The Koss Porta Pro Utility uses the same on-ear frame with swappable analogue, USB-C and Lightning cords or an optional Bluetooth adapter.