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REL Acoustics 212 SX Subwoofer (Active / Powered) I purchased this amazing Rel 212sx in October 2021. It was going to be my forever sub but due to changes to my system I'm regrettably letting it go. I have the packaging and would be able to drop it off at pack and send. At 70kg it probably won't be financially viable to ship. RELs deeper understanding of quality underpins everything we do. So, whilst 212/SX thunders and shakes foundations, it also resolves detail and restores midrange warmth to its correct balance. At 1,000 watts with (4) 12” (350mm) drivers, 212/SX drives rooms hard and in
New, a REL Acoustics 212 SX sat in true high-end territory, and at A$5,500 this used example lands a touch below the A$5,629 25th percentile and under the A$5,769 median of recent comparable AUD listings. That makes it a solid buy rather than a stretch, especially for a flagship sub that’s still asking serious money when new and tends to be held onto by owners who know what it can do.
What makes it worthwhile is the scale and control: the 212 SX is known for deep, effortless low end, excellent speed for music, and the kind of authority that can lift both two-channel and home theatre systems without sounding bloated. If it’s genuinely clean, with no driver damage, amp issues, or missing grille/feet, the price looks very sensible. It’s the sort of piece that can be a keeper if you need reference-grade bass rather than just more bass.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
REL Acoustics traces its origins to the inventive mind of Richard Edmund Lord, the man behind the brand's acronym, who founded the company in the United Kingdom around 1990 out of frustration with the subpar subwoofers available at the time. Dissatisfied with conventional low-frequency solutions, Lord crafted his own mammoth custom design, integrated into a bay window, which quickly earned acclaim from audiophiles as the finest they had encountered. This grassroots beginning in a tiny workshop marked the start of REL's relentless pursuit of audio perfection, evolving through innovations like the revolutionary High-Level Input that connects directly to a main amplifier's speaker outputs for seamless integration.
The brand specializes exclusively in powered subwoofers, eschewing amplifiers, speakers, turntables, DACs, headphones, or cables to focus intently on sub-bass systems. Early models like the Strata 2, Stadium, and Britannia range established REL's signature forward-firing designs and simplified crossovers, while later series such as T/x and the reimagined Serie S—launched in 2025 with models like the 212 Black Label and S/850—refine musicality, style, and power. Acquired in 2005 by John Hunter and Donald Brody, REL modernized its aesthetics and engineering without diluting its core philosophy.
REL commands a prestigious niche in the high-end hi-fi market as the preeminent authority on subwoofers, revered by discerning audiophiles for transforming even elite $15,000-to-$20,000 speaker systems into reference-caliber performers. Its boutique status stems from unwavering innovation and musical fidelity, positioning it as an essential upgrade for serious setups rather than a mass-market or mid-tier option.
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