HP 7S4M7AA Blackwire C3225 headset, 3.5 mm, 32 Ω, 20 Hz–20 kHz

Wired stereo headset for everyday calls

The HP 7S4M7AA Blackwire C3225 is a wired stereo headset that connects through a 3.5 mm mini-phone plug. It is built for home or personal use where a simple, reliable analogue connection is preferred over USB or wireless options. The 32 Ω impedance suits standard PC and mobile audio outputs without extra amplification. On-ear, over-the-head styling keeps both ears covered for focused binaural listening.

Passive design means no power draw or fan noise

Because the headset is entirely passive, it draws no power from the host device and produces no electronic noise of its own. The 20 Hz to 20 kHz frequency response covers the full audible range for voice and multimedia. A noise-cancelling microphone reduces background sound during calls without requiring software processing or battery power. The 7.45 ft cable gives enough reach for desk setups without adding active components.

Lightweight on-ear frame with fixed cable

The supra-aural pads rest on the ears rather than enclosing them, which keeps the headset light for long sessions but offers less isolation than circumaural models. The 3.5 mm plug is moulded to the cable, so a damaged connector means replacing the whole unit. Black finish matches most workstation aesthetics. Buyers who need a detachable cable, inline mute controls or USB audio processing should look elsewhere.