Focal ELEX-BK Elex Over-Ear Dynamic Driver Headphones

Open-Back Reference Headphone Design

These open-back headphones are engineered for accurate acoustic reproduction and detailed listening. The open-back architecture allows the drivers to operate with minimal enclosure coloration, helping deliver a more natural and spacious presentation compared to closed-back designs.

At the core of the design is a 40 mm (1 5/8") aluminium/magnesium “M”-shaped dome driver that provides wide bandwidth performance and controlled distortion levels for precise audio reproduction.

Driver & Acoustic Performance

The aluminium/magnesium “M”-shaped dome loudspeaker is designed to balance rigidity and low mass, supporting fast transient response and extended frequency range. Combined with the open-back structure, the driver delivers broad frequency coverage and controlled harmonic distortion.

• 40 mm (1 5/8") Aluminium/Magnesium “M”-shaped dome driver
• Frequency response: 5 Hz – 23 kHz (±3 dB)
• Harmonic distortion: < 0.3% @ 1 kHz / 100 dB SPL
• 80 Ω impedance

Connectivity & Included Accessories

The headphones include two detachable 6 ft (1.8 m) cables for flexible connection options with compatible audio equipment.

• 1 × 6 ft (1.8 m) 1/4" (6.35 mm) cable
• 1 × 6 ft (1.8 m) 4-pin XLR cable
• Adapter included

Active noise cancelling is not included, allowing the open-back acoustic design to operate without electronic signal processing.

Design & Build

The headphone features a lightweight design weighing 0.99 lb, helping maintain comfort during extended listening sessions while preserving a robust acoustic structure.

• Open-back headphone construction
• Total weight: 0.99 lb
• No carrying case included

Specifications