Focal Bathys MG

The Focal Bathys MG represents a genuine landmark in wireless headphone engineering — a Bluetooth headphone with active noise cancellation that refuses to compromise on high-fidelity performance. At its heart are exclusive 40mm magnesium 'M'-profile dome drivers, crafted in Focal's French workshops, delivering the kind of pure, ultra-precise sound that has long been the hallmark of Focal's finest wired headphones. The Bathys MG does not ask you to choose between convenience and quality.

Magnesium 'M'-Profile Drivers

The defining technology of the Bathys MG is its magnesium driver — and the choice of material is not cosmetic. Magnesium is exceptionally lightweight with a high damping factor, which means it responds to transient signals with extraordinary speed and control, delivering dynamics and low-level detail across the full frequency range whilst maintaining a neutral, balanced tonal signature. The 'M' profile of the dome is engineered to work in concert with the inner grilles of the ear cups, which mirror the driver's curve to optimise high-frequency reproduction. Bass is impactful without bloom; treble is crystal-clear without fatigue. The result is headphone sound that genuinely challenges the established hierarchy between wired and wireless performance.

USB-DAC Mode — High-Resolution Audio Up to 24-bit/192kHz

The Bathys MG incorporates an onboard DAC and amplifier, allowing it to process the digital signal directly from a connected source in USB-DAC mode — bypassing the source device's own DAC entirely. This delivers high-resolution audio playback at up to 24-bit/192kHz, with none of the compression artefacts associated with Bluetooth transmission. For listeners who demand the highest possible resolution from a portable headphone, this wired USB-DAC mode is where the Bathys MG truly demonstrates its pedigree. Supported formats include 44.1kHz, 48kHz, 88.2kHz, 96kHz and 192kHz at 16 or 24 bits.

Active Noise Cancellation and Connectivity

The Bathys MG is equipped with Bluetooth 5.2 with multipoint connectivity, supporting AAC, aptX, aptX Adaptive and SBC codecs — ensuring compatibility and optimal audio quality across a wide range of source devices. Eight microphones power the active noise cancellation system, with three selectable modes — Silent, Soft, and Transparent — allowing precise control over your acoustic environment. The Focal & Naim app provides access to equaliser settings and the integrated Mimi Hearing personalisation test, which analyses your individual hearing profile and optimises the sound accordingly. Settings are stored in the headphones and remain active across all connection modes.

Battery Life and Fast Charging

The Bathys MG offers 30 hours of battery life in Bluetooth mode, 35 hours via the included jack cable, and an exceptional 42 hours in USB-DAC mode — figures that place it among the most capable wireless headphones available. A 1,060mAh lithium-ion battery charges fully in 1.5 hours, and Focal's fast-charge technology delivers five additional hours of listening from just 15 minutes on charge.

Design and Materials

The Bathys MG follows the aesthetic language of Focal's high-end headphone range with characteristic precision. The yoke combines aluminium and magnesium for a structure that is both rigid and lightweight, at a total weight of 350g. The genuine leather headband and ergonomic foam earpads are designed for extended listening sessions without fatigue. An iconic backlit Focal logo is featured as standard. The Bathys MG is available in two finishes: the understated, mineral-toned Graphen Grey, and the warmer Chestnut — a tone inspired by the celebrated Focal Clear MG.

Technical Specifications

Who Is It For?

The Focal Bathys MG is for the serious listener who refuses to accept a meaningful compromise between portability and audio quality. If you have invested in a high-quality home system and find that wireless headphones have consistently disappointed, the Bathys MG — and in particular its USB-DAC mode — will change that experience. It is equally at home on a long-haul flight, in a quiet office, or paired to a laptop for high-resolution listening at a desk. Those who use the Focal & Naim app will find a level of personalisation unusual at any price point.

Buying from Martins Hi-Fi

Martins Hi-Fi has been in Norwich since 1968. Elizabeth Gould runs the business today, and we stock only brands we have heard properly and stand behind. Focal is a brand we know exceptionally well — come into the showroom and speak to Dave or Chris to hear the Bathys MG for yourself, and to find the right pairing for your listening habits. We can guide you through the app setup, noise cancellation modes and USB-DAC configuration in person.

Contact us at info@martinshifi.co.uk, call 01603 627010, or WhatsApp on 07554 687137. You can read more about how we work on our Why Martins Hi-Fi page. We are at 85–91 Ber Street, Norwich, NR1 3EY.