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This is the second Sony TA-313 amplifier I restored. The first one is in daily use in my system, it has a fantastic clear, warm and powerful sound. The original SI-1125HD module was replaced with two LM3886TF ICs ensuring a stabile, clear, very rich and powerful sound and boost the performance to 2 x 50 watts.A carefully designed and engineered member of the Sony ‘TA’ series with a characteristic pair of analog VU meters on the front. The amplifier has a clear, powerful sound, specially it’s bass is spectacular. This is a completely cleaned and restored item in excellent condition.Specifications:Manufacturer: Sony Corporation, TokyoModel: TA-313Serial No: 521944Type: Integrated Stereo AmplifierYears of manufacture: 1977 - 1979Made in: JapanColor: SilverDimensions (WHD): 410 x 145 x 280 mmNet weight: 6.5 KgTechnical data:Alternating Current supply (AC): 120 / 220 / 240 VoltMain principle: Audio-AmplificationOriginal power output: 25 watts per channel into 8Ω (stereo) / This model is upgraded to 2 x 50 wattsFrequency response: 10Hz to 50kHzTotal harmonic distortion: 0.5%Damping factor: 30Input sensitivity: 2mV (mic), 2.5mV (MM), 100mV (line)Signal to noise ratio: 76dB (MM), 95dB (line)Output: 150mV (line)Speaker load impedance: 4 - 16 ΩShape: Book-shelf unitMaterial: Metal caseInputs- Tuner- Tape- AUX- Phono- Microphone
Compared with the usual used integrateds around US$242 median and US$329 at the 75th percentile, US$581 is ambitious and clearly above normal market territory for this model. It would need unusually strong provenance, a recent service, or a bundle of worthwhile extras to make the premium feel justified.
That said, the TA-313 is the kind of vintage Sony integrated that can reward a careful buyer: solid build, straightforward ergonomics, and a smooth, listenable presentation that suits a modest analog or digital setup. If the cosmetics are clean and it’s been tested properly, the appeal is real, but at this price I’d want confirmation of fully working controls, quiet operation, and evidence it hasn’t been sitting unrestored for decades.
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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