REL No. 31 Subwoofer

The REL No. 31 is a highly refined, compact reference‑class subwoofer engineered to offer world‑class low‑frequency extension, control and musicality in systems where space or room size limits the practicality of larger subwoofers. Its 12‑inch carbon‑fibre long‑throw driver — driven by a robust 900 W RMS NextGen 7 Class D amplifier — delivers powerful, clean bass that reaches down to 17 Hz (–6 dB) in‑room, ensuring both deep impact and natural, accurate reproduction of low frequencies.

Housed in a meticulously crafted sealed cabinet with curved walls and a premium piano‑black lacquer finish, the No. 31 combines acoustic engineering with high‑end aesthetics. The design includes a high‑level Neutrik Speakon input, multiple low‑level (RCA / XLR / LFE) inputs, and outputs for flexible integration — whether you’re using high‑end stereo speakers or a full AV setup. For fine‑tuning, a dual parametric EQ (accessible via supplied remote) lets you tailor crossover and gain to your room and speakers, delivering tight, controlled bass without boom or distortion.

Thanks to its sealed enclosure, advanced amplifier limiting (LimitLess™), and carefully engineered driver, the No. 31 offers both the dynamic impact required for home cinema and the subtle control and musicality prized by hi‑fi enthusiasts. It’s an excellent choice if you want reference‑grade bass in a room‑friendly footprint without compromising on performance or refinement.

• 12″ (300 mm) long‑throw carbon‑fibre driver for deep, high‑excursion bass
• 900 W RMS NextGen 7 Class‑D amplifier — powerful, dynamic and efficient
• Sealed enclosure with low‑frequency extension down to 17 Hz (–6 dB) — deep, tight bass response
• Multiple input options: High‑level Speakon, low‑level RCA, XLR, LFE — flexible system integration
• Dual parametric EQ with remote control — precise tuning for room and speaker matching
• High‑level Speakon output and balanced XLR output — compatibility with complex audio systems and line‑array expansion
• Premium piano‑black lacquer finish and compact footprint (~638 × 435 × 720 mm) — premium looks and manageable size
• LimitLess™ high‑current limiting for maximum output without audible compression — controlled, powerful bass even at high volumes