The FiiO JT1 are closed-back dynamic headphones with 50 mm drivers and an inline microphone. They combine a 32-ohm impedance and Hi-Res Audio certification with a steel headband.
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Design and sound specifications
The closed-back ear cups help reduce incoming ambient noise, which can be useful in busier environments. This does not mean they provide active noise cancellation or complete isolation from the surroundings.
The dynamic drivers measure 50 mm in diameter, and FiiO specifies a frequency range of 15 Hz to 30 kHz. This includes frequencies beyond the range of typical human hearing, but the endpoints alone do not indicate how evenly the headphones reproduce different frequencies.
The 32-ohm impedance suggests the JT1 can work with common portable players and smartphones. The volume achieved also depends on the power output of the particular device. Sensitivity is specified as 113 dB/Vrms and 103 dB/mW.
The headphones carry Hi-Res Audio certification. This indicates that they meet the relevant criteria for high-resolution audio, but it does not guarantee a particular sound signature or the quality of a recording.
Cable and microphone
The included 1.5-metre cable is made from oxygen-free copper (OFC). The setup includes two 3.5 mm TRS connectors and an inline microphone for calls.
Before connecting, check the connector wiring and whether the device supports the microphone. A smartphone without a 3.5 mm socket will need a suitable adapter for a wired connection.
Materials, weight and colours
The headband is made from stainless steel, while the ear cups are made from ABS plastic and feature perforated aluminium covers. The headphones weigh 355 grams without the cable. For longer listening sessions, how they fit on your head can matter alongside their weight.
The model comes in three colour options: Obsidian Black, Starry Gray and Vintage Gold.
The FiiO JT1 offer wired listening and calling in a closed-back design. When considering them, it is worth checking compatibility with your device and taking their weight into account.
