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Rel Tzero MKiii subwoofer - lovely unit. I have been using these with Harbeth P3 speakers very happily but have, this year, moved to a full room setup with floorstanding speakers. Excellent condition aside from some superficial scratches visible in certain light (see pictures). All cables include...
A$550 is a fair-to-good asking price for a T/Zero MkIII in very good condition; it sits a bit under the current new-price level of about A$599 and well below the old A$849 local RRP, so it’s not cheap, but it is reasonable for a clean used unit.
What makes it worth a look is REL’s strengths: a compact sealed-box design, 100-watt Class D amp, and a fast, pitch-clean bass character that suits small rooms and small speakers better than a big, boomy sub. If it’s tidy, fully working, and includes the original accessories—especially the high-level cable and pack-in bits—it’s a sensible buy for adding subtle, musical bass without taking much floor space.
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.
See all REL Acoustics listings on RADAR.
