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Focal SUB 25 A4 10" Single Coil 4-Ohm Subwoofer

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SKU : 25A4
In Stock
  • Designed for sealed or bass reflex enclosure
  • 200 Watts RMS
  • DFS® cone (Dual Fiberglass Structure)

Focal SUB 25 A4 10" Single Coil 4-Ohm Subwoofer

The Access 25 A4 sub is the ideal boost to your car audio system's bass performance. With its 25 cm (10") diameter and its 200 W RMS rated power, it is ideally suited for fitting in a sealed or bass reflex enclosure.

Key Points

DFS® cone (Dual Fiberglass Structure)
Powerful 4 3/4" (120 mm) magnet: 200 Watts RMS
Spider decompression ventilated coil
High SPL

Enclosure Mounted

Compact sealed enclosure: 15-25L (0.52 - 0.88 cu.ft)
Bass reflex enclosure: 20-35L (0.71 - 1.23 cu.ft)

Power Handling

DFS® technology features robust and reliable cones. Composed with two 90° woven glass fibres and insulated with polyurethane, it resists to extreme acoustic environments and harsh weather conditions.

The cone have great power handling, and deep bass.


Nominal power: 200W RMS
Maximum power: 400W
Sensitivity (2,83V/1m): 85.45dB
Cone: DFS® (Dual Fiberglass Structure)
Surround: Butyl
Nom. impedance: 4 Ohms
DC resistance: 4.2 Ohms
VC diameter: 2"
VC height: 1"
Former: Kapton
Layers: 4
Wire: Copper
Inductance: 2.85mH
Xmax: ± 05/16"
Magnet d x h: 4 23/32" x 13/16"
Magnet weight: 2.75 lbs
Flux density: 0.8T
Gap height: 05/16"
Net weight: 7.7 lbs


Fs: 23.5Hz
Vas: 49.85 liters
Qts: 0.506
Qes: 0.562
Qms: 5.059
Re: 4.19 Ohms
Sd: 330.06cm2
Cas: 3.55E-07 m5/N
Mas: 129.23kg/m4
Ras: 3771.9
Cms: 3.26E-04 m/N
Mms: 140.79g
Rms: 4.109Kg/s
Ces: 908.39mF
Les: 50.49mH
Res: 37.72 Ohms
BI: 12.45N/A
SPL: 82.45 dB/W/m

More Information
Product Name Focal SUB 25 A4 10" Single Coil 4-Ohm Subwoofer
SKU 25A4
Manufacturer Focal
UPC 3544057751272
Manufacturer's Warranty 3 Year Manufacture's Warranty When Installed by Car Toys
Manufacture's Warranty 2 1 Year Manufacturer's Parts Warranty
Manufacturer Sku 25A4
Speaker Size 10 " Subwoofer
Woofer Composition DFS® (Dual Fiberglass Structure)
Woofer Surround Butyl Rubber
Sensitivity 85dB
Frequency Response 36 - 500 Hz
RMS Power Handling (watts) Up to 200
Peak Power Handling (watts) 201-400
Impedance (Ohms) 4 Ohm
Cutout Diameter (in) 9"
Top-mount Depth (Inches) 5"
Shallow Mount No
Voice Coils Single