FOCAL SUB ONE - Studio subwoofer

FOCAL SUB ONE – Professional studio subwoofer

The FOCAL SUB ONE is a reference-quality active subwoofer designed for audio professionals seeking precise and powerful bass extension from their monitoring systems. Featuring two 8″ Slatefiber woofers, a 200W RMS (2x100W) Class D amplifier, and a frequency response of 32Hz to 120Hz (±3dB), it delivers detailed and dynamic bass reproduction. Its compact design with front-mounted air vents and bass-reflex enclosure allows for discreet integration under tables or against a wall, perfect for studio and control room environments.

Main features

• Class D Amplifier: 2 × 100 W RMS for maximum efficiency and low distortion.
• Dual Slatefiber woofers: Two 8″ carbon fiber transducers for neutral, powerful bass.
• Frequency response: 32 Hz – 120 Hz (± 3 dB) for complete bass coverage.
• Maximum SPL: 114 dB (peak at 1 m) ensuring headroom for mixing and mastering.
• Adjustable Crossover: Low-pass filter from 45 Hz to 120 Hz to adapt the transition with satellite monitors.
• High-pass filter: switchable to 60 Hz or 90 Hz for satellites, optimizing stereo integration.
• Phase and Polarity Control: 0° to 180° adjustment and switchable polarity to acoustically align with monitors.
• Professional inputs and outputs: 2 × stereo XLR, 1 × XLR LFE both input and output.
• Automatic standby mode: activates after 30 minutes without signal, saving power.
• Protective cover: Protective grille for the woofers included.

Product benefits

• Deep, defined bass that reveals microdynamic details in the mix.
• Flexible integration with any studio monitor thanks to its filters and controls.
• Compact and discreet, it can be placed under a desk or against a wall without losing power.
• Quiet and efficient operation with Class D amplifier and automatic standby mode.
• Robust construction and high-quality materials “Made in France” for long-lasting sound.

Use cases

• Complete 2.1 systems in recording and mixing studios.
• Audio mastering where bass precision is critical.
• Audiovisual post-production for film, TV and streaming.
• Multichannel configurations in broadcast and professional radio.

Frequently Asked Questions

• What is the function of the high-pass filter? It allows you to offload the low-pass filter to the satellite monitors at 60 Hz or 90 Hz, improving clarity.
• How do you adjust the phase? Use a 0° to 180° rear potentiometer to align the signal with the monitors.
• What distance do you recommend for placement? Ideally, 1 m from the monitors and about 20–30 cm from the wall, depending on the acoustics.

Description for projects

Focal Sub One active subwoofer with two 8″ Slatefiber woofers, Class D amplification 2×100 W RMS, response 32–120 Hz, SPL 114 dB, adjustable LPF filters 45–120 Hz and HPF 60/90 Hz, phase adjustment 0–180°, stereo XLR and LFE inputs/outputs, automatic standby mode, protective grille, dimensions 475×310×520 mm, weight 18.5 kg.