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Verkaufe meine infinity kappa 8.1 Boxen in guten zustand. Funktioniert einwandfrei. Ohne abdekung.
Timing matters here: this is an older Infinity Kappa design, so the real question is whether you want a classic high-end passive sub now rather than chasing a newer, easier-to-service alternative. At €450, it sits below the €562 median for your recent comps and well above the €310 25th percentile, so this reads as fair to slightly favorable, not a bargain-bin steal.
What makes it worthwhile is the Kappa line’s reputation for deep, capable bass and strong build quality; these are the kind of subs people buy when they want authority rather than compact convenience. If the driver, amp, and foam/suspension are healthy and the seller can demonstrate clean operation, this is a sensible buy at the money. I’d just want to verify age-related wear and any service history, since condition matters more than the asking price on an older sub like this.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Infinity emerged in 1968 from a Woodland Hills, California garage, founded by Arnie Nudell, John Ulrick, and Cary Christie. Driven by Nudell's passion for classical music and innovative engineering, the trio launched with the groundbreaking Servo-Statik speaker system, featuring electrostatic panels paired with a servo-controlled woofer derived from defense technology. This American brand quickly gained traction through pioneering materials like neodymium magnets, mylar diaphragms, and polypropylene cones, establishing a legacy of pushing audio boundaries before acquisitions by Electro Audio Dynamics in 1974 and Harman International in 1983.
The company has long focused on loudspeakers as its hallmark, from early electrostatic hybrids and the iconic Reference and Kappa series to later EMIT and EMIM drivers in the 1970s. While primarily a speaker specialist, Infinity has ventured into home and mobile audio, including amplifiers and systems under Harman ownership, now part of Samsung since 2017. Turntables, DACs, headphones, and cables remain outside its core expertise.
Positioned as a mid-tier powerhouse with high-end aspirations, Infinity commands respect among knowledgeable buyers for its vintage collector appeal and enduring innovations. Once a darling of audiophiles for transparency and dynamics, it now blends accessible performance with Harman reliability, appealing to those seeking proven heritage without boutique exclusivity.
See all Infinity listings on RADAR.
