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The broader used-market median is US$115, with the lower quartile at US$63 and upper quartile at US$228. At US$90, this sits below the median but not below the 25th percentile, making it a fair-to-good buy rather than an outright bargain—assuming it is genuinely working and cosmetically sound.
The TA-N721 is a substantial early-1990s power amplifier, offering a useful 135 watts per channel into 8 ohms and plenty of headroom for conventional speakers. Its straightforward power-amp design and 9.5 kg chassis give it more serious appeal than a basic budget component. Confirm that both channels play cleanly, the protection circuit does not trip, and the speaker terminals and inputs are sound; at this price, a tested example is worthwhile, while an untested one deserves negotiation.
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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