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SUB 25 A4 | 10″ (25cm) Access Series Subwoofer – Focal Performance
Powerful Bass. Proven Focal Reliability.
The Focal SUB 25 A4 is the perfect way to add depth and authority to your car’s audio system.
Designed around a 10″ (25cm) DFS® cone and a high-efficiency 120mm magnet, this subwoofer delivers tight, controlled bass with 200 watts RMS of real power. Whether in a sealed or bass-reflex enclosure, it brings your music to life with clarity and impact.
Engineered in France, the SUB 25 A4 embodies the spirit of the Access Series — performance, durability, and precision, all in one versatile package.
Durable DFS® Cone Technology
The SUB 25 A4 features Focal’s DFS® (Dual Fiberglass Structure) cone — a unique blend of two woven fiberglass layers bonded with a polyurethane core.
This composite design ensures outstanding rigidity, weather resistance, and excellent power handling, even under the toughest acoustic conditions.
The result? Clean, deep, distortion-free bass, ready to take on any genre or volume level.
Compact Yet Powerful Design
Thanks to its efficient motor structure and ventilated spider decompression coil, the SUB 25 A4 achieves both thermal stability and extended low-frequency response.
Its compact footprint makes it ideal for tight installations while maintaining impressive SPL and dynamic headroom.
Enclosure Recommendations
For optimal performance, Focal recommends the following enclosure volumes:
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Sealed enclosure: 15–25 L (0.52–0.88 cu.ft) – tight, punchy response
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Bass-reflex enclosure: 20–35 L (0.71–1.23 cu.ft) – deeper, more extended low end
This flexibility allows you to tune your system to suit your preferred listening style — precision or power.
Key Features
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10″ (25cm) subwoofer – designed for sealed or ported boxes
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DFS® cone (Dual Fiberglass Structure) for rigidity and reliability
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120mm (4¾”) magnet – 200W RMS / 400W max power handling
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Spider decompression ventilated coil for cooling and efficiency
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High SPL output with clean, deep bass
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Compact design for flexible installation
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Engineered and developed in France
Access Series – Performance That Lasts
The Focal SUB 25 A4 represents the essence of the Access Series:
dynamic power, lasting reliability, and pure acoustic precision.
Whether you’re upgrading a factory system or building your first full Focal setup, this subwoofer delivers the signature sound balance and robust build quality that make Focal an industry benchmark.
SUB 25 A4 – Compact in size, colossal in performance.
