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The BRAVIA Theatre Sub 9 is Sony’s serious, premium wireless subwoofer, and at €20 this is an outright bargain. Your 17 comparable listings put the median at €102, with the lower quartile at €51, so this asking price is dramatically below even the bargain end of the market.
Its appeal is substantial: dual opposing 200 mm aluminium drivers, a powerful 600 W amplifier, controlled low bass with reduced cabinet vibration, and straightforward wireless integration with compatible BRAVIA and Sony home-theatre systems. It can also support a second Sub 9 for more even room coverage. At €20, the only sensible qualification is to confirm that it powers up, pairs correctly, and includes whatever connection or setup accessories are needed; if functional, this is an exceptional buy.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Sony emerged from the ruins of post-World War II Japan, founded on May 7, 1946, by Masaru Ibuka and Akio Morita as Tokyo Tsushin Kogyo K.K. in Tokyo's Nihonbashi district. Starting with radio repairs and Japan's first magnetic tape recorder, the duo secured transistor licensing from Bell Labs, pioneering the TR-55 transistor radio in 1955. Renamed Sony Corporation in 1958—from the Latin "sonus" for sound—the brand symbolized Japan's ascent from cheap imitations to innovative leadership, fueled by Ibuka's engineering prowess and Morita's global marketing vision.
Sony's hi-fi legacy spans headphones, amplifiers, speakers, turntables, and DACs, alongside landmark formats like the Compact Disc in 1982 and Blu-ray. Iconic products include the Walkman for portable audio revolution and Trinitron televisions, blending consumer accessibility with cutting-edge tech. Today, offerings like the Signature Series headphones and ES amplifiers target discerning listeners seeking refined soundstaging and dynamic range.
Positioned as a mid-to-high-end powerhouse, Sony commands respect among knowledgeable buyers for blending mass-market reliability with premium performance, outpacing many pure audiophile brands in innovation and value. Far from vintage relic or niche boutique, it dominates with forward-thinking engineering, holding strong market share in headphones and streaming ecosystems.
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