ISUB TWIN | Ultra-Compact Passive Subwoofers – Focal Inside
Twin Subwoofers. One Compact Powerhouse.
The Focal ISUB TWIN system brings deep, controlled bass into your cabin without sacrificing space or factory fitment. This pair of ultra-compact passive subwoofers integrates seamlessly into your vehicle, sliding neatly under the front seats to deliver powerful low-frequency impact and a more dynamic listening experience.
Engineered for Tight, Dynamic Bass
Each ISUB TWIN enclosure features heavy-duty double ferrite motors and rigid aluminium diaphragm woofers designed to produce clean, distortion-free bass at all volumes.
Together, the twin subwoofers generate a rich, impactful low-end that dramatically enhances your factory system’s depth, clarity, and overall balance.
The front-mounted metal grilles ensure optimal sound dispersion throughout the cabin while protecting the drivers from physical damage.
Compact. Practical. 100% Plug & Play.
Installation is quick and non-invasive — no cutting, drilling, or modification required.
The subwoofers simply slide under the seats and can be secured using the supplied hook-and-loop straps, or permanently fixed to the vehicle floor if desired.
When paired with the Focal Impulse 4.320 amplifier, the ISUB TWIN delivers outstanding results, while leaving two amplifier channels free to power your front speakers for a complete OEM+ upgrade.
Crafted with Focal Expertise
Developed in France by Focal’s acoustic engineering team, the ISUB TWIN represents the brand’s commitment to innovation, precision, and musicality.
Every detail—from the enclosure design to the diaphragm material—has been refined for tight, impactful, and balanced bass performance that enhances every genre of music.
Running-In Period
For optimal results, allow a running-in period of several weeks at medium volume with a full-range music source. This ensures that the ISUB TWIN’s drivers reach their full potential — delivering the tight, expressive bass expected from every Focal system.
Compact Design. Expansive Sound.
The Focal ISUB TWIN redefines what’s possible from an underseat subwoofer system — delivering powerful, articulate bass in an ultra-compact Plug & Play form.
No compromises. Just pure, balanced performance.
Focal ISUB TWIN – Compact Design. Expansive Power.
