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The Focal Slatefiber SUB 20 SF is an 8 inch (200mm) passive subwoofer rated at 200W RMS, part of Focal's second-generation Slatefiber range. It features a recycled carbon fibre cone, ferrite motor, 90mm mounting depth, and comes with a grille included.
Key specifications
- Type: passive subwoofer
- Size: 8" (200mm)
- Power handling: 200W RMS, 400W maximum
- Sensitivity: 87dB
- Impedance: 4 ohms
- Mounting depth: 90mm (3.54")
- Cut-out diameter: 200mm (7.87")
- Voice coil: 52mm (2.05")
Focal SUB 20 SF
The SUB 20 SF delivers powerful, controlled bass with a significant impact on low frequencies in your vehicle. Its exclusive Slatefiber cone is made from recycled carbon fibres, ensuring precision, responsiveness, and long-term durability.
- Exclusive Slatefiber technology
- 200W RMS power handling for sustained performance at high volume
- Optimised efficiency to reduce amplification requirements
- Solid construction with rigorously selected materials
- Grille included
The second-generation Slatefiber range is designed and engineered by Focal to combine precision, responsiveness, and robustness. The range spans passive kits through to subwoofers, offering consistent sound coherence across models alongside a bold aesthetic.
Powerful Bass
The non-woven recycled carbon fibre Slatefiber cone provides rigidity, speed, and precise damping. The result is dynamic, deep, distortion-free bass — even at high volume or during extended listening sessions.
Robust Design & Exemplary Performance
A ferrite motor guarantees stability at high excursion, while the butyl surround maintains durability and precise control. The aluminium rotor design frame adds structural strength and a bold visual identity.
Easy Installation & Compatibility
A push terminal block and included grille make for quick, reliable installation. Optimised efficiency keeps amplification requirements low, making the SUB 20 SF compatible with a wide range of car audio systems.
Explore the full range in Focal Slatefiber.
Specification
| Nominal power | 200W RMS |
|---|---|
| Maximum power | 400W |
| Sensitivity | 87dB |
| Nom. impedance | 4Ω |
| Cone | Slatefiber |
| Surround | Butyl |
| DC resistance | 2.8Ω |
| VC diameter | 52mm / 2.05" |
| Depth | 90 mm / 3.54 in |
| Cut-Out diameter | 200 mm / 7.87 in |
| Depth behind surface (Mounting depth) | 90 mm / 3.54 in |
| Former | Glass fiber |
| Layers | 4 |
| Wire | Copper |
| Net weight | 3.3kg / 7.28lbs |
What's Included
- Focal Slatefiber SUB 20 SF
- Screws
- Mounting Brackets
- Grille (fitted)
Focal
About the Focal SUB 20 SF
From our tech experts at CEN
The Focal Slatefiber SUB 20 SF is an 8 inch (200 mm) passive subwoofer driver with a recycled carbon fibre Slatefiber cone and a ferrite motor. It handles 200 W RMS and 400 W maximum at 4 ohms, with 87 dB sensitivity and a 52 mm voice coil. A grille is fitted.
Who it suits
Drivers adding compact bass to a Slatefiber system, or anyone who needs an 8 inch sub where space is limited. It needs a 200 mm cut-out and 90 mm of mounting depth. The Slatefiber 165 SF component kit completes the front stage.
Our tech experts advise
This is a driver rather than a finished system, so enclosure volume and tuning decide what you hear. We build enclosures to suit the vehicle at our Beeston workshop. Installation is priced per vehicle, so get in touch.
Explore the full Focal range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Focal
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Focal Car Audio
To combine the pleasure of driving with the love of sound, make sure your car is fitted with quality hi-fi equipment. Focal high-fidelity sound promises sensational musical emotions to enhance every journey.
Speaker Kits
With Focal's dedicated car speakers, take advantage of a wide choice of models to compose your own customized audio system, according to your vehicle and your desires. From the Focal discovery with the Universal range to the Utopia M excellence, listening in the car takes on a whole new dimension
Subwoofer
Choose one of Focal's subwoofers (passive, active, bass-reflex, ultra-flat...) and bring powerful, deep bass. Offering a variety of models in different formats, our range meets every installation need and is the ideal audio complement.
DSP & Amplifiers
To optimize the sound quality of your installation and enhance in-car listening, we offer a range of amplifiers and DSPs to match your loudspeakers. These Focal electronics let you experience the sensations of precise, controlled and stable sound.
Accessories & Cables
Discover Focal's range of amplifiers and cables for a complete solution. As a complement to your installation, amplifiers let you experience the sensations of precise, controlled sound, and cables answer questions linked to amplification and connections between components.
Focal Car Audio
Deliver exceptional sound clarity and precision for your vehicle
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Frequently Asked Questions
Q: Can CEN fit these speakers for me?
A: Yes. CEN offers professional installation from our Nottingham premises. Contact us to book an installation slot or ask for a fitting quote.
Q: Do I need an amplifier for the SUB 20 SF?
A: Yes. The SUB 20 SF is a passive subwoofer, so it needs an external amplifier matched to its 200W RMS, 4 ohm rating.
Q: How deep is the SUB 20 SF?
A: The SUB 20 SF has a mounting depth of 90mm (3.54 inches) and needs a 200mm cut-out.
Q: Is a grille included with the SUB 20 SF?
A: Yes. A grille is included with the subwoofer.
Q: What does RMS power mean?
A: RMS is the continuous power a subwoofer can handle, and it is the number that matters when matching an amplifier. Peak or max figures describe short bursts only.
