Experience refined, powerful bass in a compact form with the Sonus Faber Gravis I Compact Subwoofer in Walnut Wood finish (model SBWU52RFI). This active subwoofer combines Italian craftsmanship and high‑performance audio engineering, making it an ideal match for stereo or home‑theatre setups that demand both elegant aesthetics and deep, musical low‑end.
Featuring an 8‑inch (210 mm) ultra‑long‑throw driver in a down‑firing sealed enclosure, the Gravis I houses a Class AB amplifier rated at 150 W RMS (250 W peak), delivering clean and controlled bass down to approximately 30 Hz. :contentReference[oaicite:0]{index=0}
With dedicated volume controls for both “Master” and “LFE” levels, a continuously adjustable crossover (30‑120 Hz, 24 dB/octave slope), and a phase switch (0°/180°), the subwoofer offers flexible calibration for music or home‑theatre use. :contentReference[oaicite:1]{index=1}
The Walnut wood veneer finish allows the Gravis I to blend beautifully into refined audio spaces while delivering impactful low‑frequency performance. Compact and stylish, it’s perfectly suited for music‑first listening rooms or high‑end home theatres.
Features
- Compact sealed active subwoofer with down‑firing 8‑inch driver
- 150 W RMS / 250 W peak Class AB amplification :contentReference[oaicite:2]{index=2}
- Frequency response from approximately 30 Hz (@‑6 dB) upward to the user‑set crossover :contentReference[oaicite:3]{index=3}
- Independent Master & LFE volume controls, 30‑120 Hz adjustable crossover, 0°/180° phase switch :contentReference[oaicite:4]{index=4}
- High‑quality Italian craftsmanship with premium Walnut wood veneer finish
- Designed to pair seamlessly with Sonus Faber Sonetto and Lumina speaker series
Specifications
| Brand | Sonus Faber |
| Model | Gravis I – Walnut |
| Type | Active sealed subwoofer |
| Driver | 1 × 210 mm (8″) ultra‑long‑throw woofer :contentReference[oaicite:5]{index=5} |
| Amplifier Power | 150 W RMS / 250 W peak :contentReference[oaicite:6]{index=6} |
| Frequency Response | From ~30 Hz (‑6 dB) upward to user‑adjustable cutoff :contentReference[oaicite:7]{index=7} |
| Crossover Range | 30–120 Hz continuously adjustable (24 dB/octave) :contentReference[oaicite:8]{index=8} |
| Phase Control | 0° / 180° switch :contentReference[oaicite:9]{index=9} |
| Inputs | Line (mono RCA) + LFE (mono RCA) + High‑Level (Neutrik 4‑pole Speakon®) :contentReference[oaicite:10]{index=10} |
| Dimensions (H × W × D) | 334 × 286 × 316 mm (13.1 × 11.2 × 12.4 in) :contentReference[oaicite:11]{index=11} |
| Weight | 14 kg (30.9 lb) :contentReference[oaicite:12]{index=12} |
| Finish | Walnut Wood Veneer |
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