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The Thieaudio Cypher is an open-back headphone featuring a 50mm dynamic driver, designed for wide and airy reproduction. It relies on a high flux density magnetic circuit in order to better control the diaphragm, allowing it to maintain a stable response across the entire 20Hz-20kHz spectrum, while promoting good separation between frequency ranges.
It combines a 32Ω impedance and a sensitivity of approximately 96dB, enabling use with a variety of sources while maintaining improved control when paired with dedicated amplification. This approach extends with a dual 3.5mm jack detachable connection, facilitating integration into different audio chains, while its mechanical design with a suspended headband ensures stable positioning during extended listening sessions.
The Cypher is based on a 50mm dynamic driver incorporating a multi-magnet N45 magnetic circuit with 20 cores, whose stabilized flux density improves diaphragm control, allowing distortion to be reduced while maintaining good transient response. This mechanical control extends through an open-back design that reduces internal resonances, resulting in a wider soundstage and improved layer readability.
The 20Hz to 20kHz frequency response covers the entire audible spectrum, while maintaining present bass without overload, the overall balance favoring clarity rather than pressure.


With a 32Ω impedance and a sensitivity of approximately 96dB, the headphones remain easy to drive while gaining in stability when paired with dedicated amplification. This compatibility allows use with both mobile sources and DACs or headphone amplifiers.
The dual 3.5mm jack connection on the earcups enables the use of detachable cables, allowing easy adaptation to balanced or single-ended configurations depending on the setup.
The structure combines aluminum, stainless steel and carbon fiber, reducing unwanted vibrations while ensuring overall rigidity. This design extends with a weight of approximately 411g, distributed through a suspended headband and memory foam earpads, allowing stable positioning without creating pressure points. This mechanical stability directly contributes to maintaining consistent acoustic coupling, especially during extended listening sessions.

Technical specifications
| Specifications | |
|---|---|
| Product type | Headphones |
| Headphone type | Open-back |
| Driver | Dynamic |
| Frequency response | 20Hz to 20kHz |
| Nominal impedance | 32Ω |
| Sensitivity | 96dB @ 1kHz/1Vrms |
| Detachable cable | |
| Headphone connectors | 2x 3.5mm jack |
| Cable length | 1.5m |
| Cable termination connector | Jack 3.5mm |
| General | |
|---|---|
| Dimensions | 225 x 190 x 142.5mm |
| Weight | 411g |
| Package contents | 1x Thieaudio Cypher 1x Dual 3.5mm jack to 3.5mm jack cable 1x 3.5mm jack to 6.35mm jack adapter |
| Color | Black |
| Impedance (Ω) | 32 |
| Efficiency / Sensitivity (dB) | 96.0 |
| Lowest frequency (Hz) | 20 |
| Highest frequency (Hz) | 20000 |
| Wireless | No |
| Cable termination | Jack 3.5mm |
| Headphone / Earphone connector | Jack 3.5mm |