Focal Car Subwoofers – Flax Evo, K2 Power & More

Focal Subwoofers at a glance

Focal SUB 10 & SUB 12 (Subwoofer Line) – entry-level 10" and 12" drivers in single voice coil, dual voice coil and slim-mount variants; from £109.99
Focal Slatefiber SUB 20 SF – 8" passive subwoofer with recycled carbon fibre cone and grille included, 200W RMS; £179.99
Focal Flax Evo (P20FE, P20FSE, P25FE, P25FSE, P30FSE) – 8", 10" and 12" glass fibre/flax/glass fibre sandwich cone drivers in standard-depth and slim-mount options; from £219.99
Focal K2 Power M SUB 5 KM – compact 5¾" K2 aramid fibre sandwich cone driver, 200W RMS, 69mm mounting depth; £399.99
Focal K2 Power (SUB 25 KXE, SUB 25 KXS, SUB 30 KXE) – 10" and 12" high-power K2 sandwich cone drivers with dual voice coils; up to 800W RMS; from £419.99
Focal Utopia M SUB10WM – flagship 10" subwoofer with M-profile W sandwich cone and neodymium motor, 400W RMS; £899.99

Which Focal subwoofer should I choose?

The Subwoofer Line (SUB 10, SUB 12) is the most accessible option, with polypropylene cones suited to sealed or bass-reflex enclosures. Choose a dual voice coil version if you want wiring flexibility for your amplifier, and the Slim variants if enclosure depth is restricted. The Slatefiber SUB 20 SF steps up with a recycled carbon fibre cone and includes a grille. Flax Evo models use a glass fibre/flax/glass fibre sandwich cone and handle up to 300W RMS; FSE slim variants are designed for compact sealed builds.

For higher power, the K2 Power SUB 25 KXE handles 600W RMS and the SUB 30 KXE reaches 800W RMS, both featuring dual voice coils and K2 sandwich cones made in France. The K2 Power M SUB 5 KM offers a compact 5¾" option at 200W RMS where space is the primary constraint. At the top of the range, the Utopia M SUB10WM combines an M-profile W sandwich cone with a neodymium motor and requires just 10 litres of sealed enclosure, also manufactured in France.

Focal Subwoofers FAQs

Q: What is the difference between the Focal SUB 10 single and dual voice coil versions?

A: Both are rated at 250W RMS; the dual voice coil version has 4+4 ohm coils that can be wired in parallel to present a 2 ohm load to your amplifier, letting it deliver maximum power.

Q: Which Focal subwoofers are slim or shallow-mount?

A: The SUB 10 Slim, SUB 12 Slim, P20FSE, P25FSE, P30FSE and SUB 25 KXS are all shallow-mount designs — the P20FSE and P25FSE have a 3 inch mounting depth, and the SUB 25 KXS measures 94mm deep.

Q: Does the Focal Slatefiber SUB 20 SF come with a grille?

A: Yes, the Slatefiber SUB 20 SF comes with a grille included as standard.

Q: Can CEN fit a Focal subwoofer in my car?

A: Yes — CEN's fitting workshop in Beeston, Nottingham can install Focal subwoofers; contact the team to discuss your vehicle, enclosure type and amplifier requirements.

Q: Which Focal subwoofer in this range has the highest power handling?

A: The Focal SUB 30 KXE from the K2 Power series tops the range at 800W RMS, with dual 4 ohm voice coils and a 12 inch K2 sandwich cone.

Focal Subwoofers

Focal Subwoofers at a glance

Which Focal subwoofer should I choose?

Focal Subwoofers FAQs

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