SUB 30 A4 | 12″ (30cm) Access Series Subwoofer – Focal Performance
The Focal SUB 30 A4 brings the full force of Focal’s Access Series performance to your vehicle.
With a 12″ (30 cm) Dual Fiberglass Structure (DFS®) cone and a 250W RMS power rating, this subwoofer delivers tight, powerful, and musical bass — the perfect finishing touch for any high-performance audio setup.
Designed for sealed or bass-reflex enclosures, the SUB 30 A4 achieves remarkable dynamics and exceptional depth, making it ideal for drivers who crave precision and punch in equal measure.
DFS® Cone – Durability Meets Dynamics
The Dual Fiberglass Structure (DFS®) cone offers outstanding rigidity and reliability, built to handle high SPL levels without distortion.
Made from two layers of woven glass fibre bonded with a polyurethane core, this composite cone resists both environmental extremes and acoustic stress — ensuring consistent, distortion-free low-end response.
The result? Rich, tight bass that stays pure even under demanding playback conditions.
Pure Power and Control
Driven by a robust 120 mm (4¾”) magnet and spider decompression ventilated coil, the SUB 30 A4 delivers controlled excursion, excellent heat dissipation, and exceptional transient response.
Every note feels defined, precise, and full of energy — translating the raw emotion of your music into a truly immersive listening experience.
Enclosure Compatibility
For optimal performance, Focal recommends the following configurations:
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Sealed enclosure: for accuracy and tight response
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Bass-reflex enclosure: for extended low-frequency output and impact
This versatility makes the SUB 30 A4 suitable for a wide range of vehicles and audio preferences.
Access Series – Power You Can Feel
The Focal SUB 30 A4 represents the essence of the Access Series philosophy:
dynamic, high-fidelity sound built on engineering precision and durability.
Whether you’re adding a single subwoofer or building a multi-driver system, the SUB 30 A4 delivers deep, articulate bass that defines every beat — and transforms every drive into a true listening experience.
SUB 30 A4 – The power of precision. The depth of Focal performance.
