Sonus Faber Gravis III Subwoofer
- Free Mainland UK Shipping on orders over £100
- Official Hi-Fi Retailer since 1973
- Usually in stock and dispatched in 1-5 working days
We offer free delivery on all orders over £100 to mainland UK. Orders under £100 are subject to a £6.50 shipping charge.
Delivery is available across mainland UK. If you are located outside mainland UK and would like a shipping quote, please get in touch before placing your order.
We aim to dispatch in-stock items as soon as possible provided that we physically have the stock - but please note that sometimes we have to order from our supplier for certain products, in which case delivery should take place within 1-5 working days of the order being placed.
Tracking details or estimated delivery timescales will be provided once your order has been processed. If there are any delays due to stock availability, we will contact you as soon as possible with the option to wait or receive a full refund.
Please note that certain products may be subject to specific distance selling or delivery regulations. If you are unsure about a product or its delivery terms, we recommend contacting us before purchase.
You can cancel your order within 14 days of receiving your goods, in line with UK distance selling regulations. Once you’ve notified us, you have a further 14 days to return the item. Please contact us by email, phone or in writing before sending anything back.
Items must be returned in original condition and packaging, including all accessories, manuals and any promotional items. The cost of return is your responsibility and we strongly recommend insuring the goods, as refunds cannot be issued for damaged or incomplete returns. If items show excessive handling, are missing components, or cannot be resold as new, a reasonable deduction may be made.
Please note that used headphones (for hygiene reasons) and custom or special-order items cannot be returned. If you need assistance arranging a return, we’re always happy to help.
Product Summary
The Sonus faber Gravis III is an active subwoofer designed to add greater depth, power and realism to both music and home cinema systems. Sitting above the Gravis II, it offers a more powerful sealed-box design while retaining the elegant materials and refined visual style associated with Sonus faber.
Its 250 mm long throw sandwich honeycomb cone driver is powered by a high-performance Class AB amplifier rated at 600 W RMS, with peak output up to 900 W. This combination allows the Gravis III to deliver bass that feels substantial and controlled, giving music more scale and film soundtracks greater impact without losing composure.
The sealed cabinet design helps the subwoofer respond quickly and cleanly, making it especially well suited to hi-fi systems where bass quality matters as much as bass quantity. Adjustable crossover, phase and EQ controls allow the Gravis III to be tuned carefully to suit different speakers, rooms and listening preferences.
With its artisan-crafted wood or lacquer finish and black leather detailing, the Gravis III is built to complement premium Sonus faber loudspeakers, particularly the Olympica Nova collection, while also integrating beautifully into a wide range of high-end stereo and AV systems.
Key Benefits
- Adds deeper, more authoritative bass to music, films and television while maintaining control and refinement
- Sealed-box cabinet helps deliver fast, accurate bass that integrates well with quality stereo speakers
- 250 mm long throw sandwich honeycomb driver provides impressive low-frequency extension and impact
- 600 W RMS Class AB amplification gives the subwoofer confident power for demanding listening sessions
- Adjustable crossover and phase controls make it easier to blend the subwoofer smoothly with your main speakers
- Built-in EQ options help tailor bass performance to different rooms and system setups
- Elegant Sonus faber styling makes it suitable for premium living rooms and dedicated listening spaces
- Designed to complement Sonus faber loudspeakers, especially the Olympica Nova collection
- Available in Walnut Wood with Black Leather, Wenge Wood with Black Leather and Piano Black Lacquer with Black Leather
- 2 years standard manufacturer's warranty, extendable to 3 years on subwoofer electronic boards and drivers when registered with Sonus faber within 30 days of purchase
Technical Specifications
Subwoofer Type
- Type: Active subwoofer
- System: Sealed box loading, single driver active subwoofer
- Driver: 250 mm long throw sandwich honeycomb cone LF unit with wide rubber surround
- Decoupling System: Rubber pad
Performance
- Frequency Response: 25 Hz – 150 Hz
- Amplifier Type: High-performance Class AB
- Amplifier Power: 600 W RMS, 900 W peak
- Crossover Frequency: Continuously adjustable from 40 Hz to 150 Hz
- Crossover Slope: 24 dB / octave
- Phase Control: Continuously adjustable from 0° to 180°
- EQ Features: Three EQ presets with six fully parametric EQ filters
Connections & Controls
- Inputs: LFE mono RCA, Line mono RCA and High Level Neutrik 4-pole Speakon
- Controls: LFE and Line input gain control, crossover frequency, phase control and EQ selection
- App Control: Compatible with the Sonus faber Gravis app via Bluetooth Low Energy
- Mains Input Voltage: Factory selected, 120 V AC 60 Hz or 230 V AC 50 Hz
- Power Consumption: 0.5 W standby, 600 W rated power
Physical
- Dimensions (H × W × D): 415 × 400 × 495 mm
- Weight: 26.7 kg per unit
- Cabinet: Squared shape with wood or lacquer finish and black leather detailing
- Available Colours: Walnut Wood with Black Leather, Wenge Wood with Black Leather and Piano Black Lacquer with Black Leather
What’s in the Box
- Sonus faber Gravis III active subwoofer
- Power cable
- High Level Neutrik Speakon cable
- Product documentation
