Sonus faber Gravis III
Sonus faber Gravis III amplified subwoofer, fitted with a 25 cm driver and Class AB amplification, to complement a stereo or home cinema system.
Description
The Gravis III is an amplified subwoofer designed by Sonus faber to complement a stereo or audio/video system. It belongs to the Gravis collection, which brings together the Italian brand's subwoofers alongside the Gravis I and II models.
The unit features a 25 cm long-throw driver, fitted with a honeycomb sandwich cone and a wide forward-facing rubber suspension, paired with a high-linearity Class AB amplification. The rated power of 600 W, with a peak of 900 W, delivers bass with a stated frequency response of 25 Hz to 40 up to 150 Hz. Automatic calibration and continuously adjustable signal phase from 0° to 360° make it easier to integrate the subwoofer into a given listening room. Connectivity includes a mono RCA LFE input shared with an RCA Line input, a stereo RCA Line input, an XLR Line input, as well as a high-level Neutrik 4-pole Speakon input.
This subwoofer is aimed at users wishing to reinforce the bass of a stereo or home cinema system, particularly alongside speakers from the Sonus faber Sonetto collection, with which it was designed to match.
Technical specifications
| Rated power | 600 W |
| Peak power | 900 W |
| Frequency response | 25 Hz to 40 up to 150 Hz |
| Dimensions (H × W × D) | 414 x 400 x 495 mm (including feet) |
| Weight | 26.7 kg |
What to check before buying used
On an amplified subwoofer of this power, it is worth testing the internal electronics, particularly the automatic calibration and phase adjustment, as well as checking for the absence of any noise or distortion at high volume. The 25 cm driver deserves particular attention: its rubber suspension should remain supple and free of cracks or sagging. It is also worth checking the condition of the connectors, in particular the 4-pole Speakon input, as well as the tightness of the feet under the cabinet.
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