Наушники — Audio-Technica ATH-AD900X

The ATH-AD900X belongs to the AD line of full-size headphones from Audio-Technica, with an open-air dynamic design built around drivers designed exclusively for this model and a self-adjusting support system in place of a conventional padded headband. At launch it carried an American MSRP of USD 299.95. Its earcups sit in honeycomb aluminium casings, and the cable is permanently attached rather than detachable.

Key specs that matter

The 53 mm dynamic drivers combine rare-earth magnets with voice coils wound from aluminium wire clad in copper, a method Audio-Technica abbreviates as CCAW. The quoted frequency range runs from 5 Hz to 35,000 Hz. Sensitivity is rated at 100 dB/mW, impedance at 38 ohms, and maximum input power at 1,000 mW. The headphone weighs 265 g without counting the cable, which measures 3.0 m and terminates in a gold-plated 3.5 mm mini stereo plug. For larger sockets, a removable 6.3 mm adapter comes in the box.

Engineering and use context

Instead of a padded band across the crown, the frame uses two curved rods carrying spring-loaded padded wings. Audio-Technica names this arrangement 3D Wing Support Housing and states that it adjusts itself to each wearer. The drivers sit angled slightly toward the ear rather than parallel to it. Earpads are light foam covered in soft black fabric, and Audio-Technica sells a replacement earpad that fits the ATH-AD500X, ATH-AD700X and ATH-AD900X alike, so worn pads can be renewed with a factory part. The honeycomb aluminium casing keeps the cups light while leaving the rear of each driver open. Because the back of each cup is open, ambient noise reaches the ear and the headphone's own output is audible nearby, so it belongs in a quiet private space rather than on public transport or in a shared office. The long lead gives freedom to move away from a desktop system or a hi-fi rack, and because the lead is fixed, a worn cable needs a service repair instead of a simple swap.

Pairing

Easy to drive by design, the ATH-AD900X plays straight from phones, laptops and portable players through its mini plug, and the supplied adapter covers integrated amplifiers, receivers and dedicated headphone amplifiers with full-size outputs. This makes a separate headphone amplifier a choice, not a necessity, and the power rating leaves ample headroom for such a unit.

Alternatives

Within the same catalogue, the ATH-ADX5000 moves up to 58 mm drivers with a 420-ohm rating in a magnesium-framed open-back build.