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Here's a polished English translation suitable for a sales listing:Vintage Optonica Hi-Fi Set for SaleA beautiful vintage Hi-Fi combination consisting of:✅ Optonica SM-4646 Integrated Amplifier✅ Optonica ST-1616 FM/AM TunerThese components were manufactured by Optonica, the renowned high-quality audio brand owned by Sharp, highly regarded by enthusiasts of vintage Japanese audio equipment for its excellent build quality and reliability.The SM-4646 amplifier delivers a warm, dynamic, and detailed sound, making it ideal for both vintage and modern loudspeakers. It has been fully cleaned, inspected, and calibrated. Defective components have been replaced, and the unit is now in near-perfect condition, ready to provide many more years of listening enjoyment.The ST-1616 tuner perfectly complements the system, offering stable radio reception and matching aesthetics.Main FeaturesClassic 1970s-1980s design with elegant brushed aluminum front panelSolid, high-quality constructionInputs for turntable, tuner, AUX, and tape recorderBass, treble, and balance controlsEasy-to-use analog tunerPerfect for vintage Hi-Fi systems or collectorsConditionExcellent cosmetic condition considering its age. The only noticeable flaw is a scratch on the tuner's band selector switch, visible in the photos attached to this listing.Normal signs of use consistent with vintage equipmentSold as shown in the photographsPlease examine the pictures carefully to assess the cosmetic conditionWhy Buy It?A rare and attractive Optonica combination representing some of the finest Japanese Hi-Fi engineering of its era. Ideal for collectors, audiophiles, and anyone looking for a vintage system with exceptional sonic performance and timeless visual appeal.The sale of both units together is preferred.PricesComplete set (Amplifier + Tuner): €800.00Individual prices:Amplifier: € 700.00Tuner: € 175.00ShippingCarefully packed and fully protected to ensure maximum safety during transport.This rare Optonica system is an excellent opportunity to own a piece of classic Japanese Hi-Fi history.
This is an ambitious ask, not a bargain: US$1,027 is well above the six-listing median of US$763 and exceeds the 75th percentile of US$878. That puts it outside the normal asking range unless this particular example has unusually strong provenance, recent professional servicing, or exceptional cosmetic condition.
The SM-4646 is a substantial vintage integrated amplifier with a lively, detailed presentation, useful phono facilities, and genuine drive from its dual-mono-style power arrangement. Its roughly 70-watt-per-channel rating into 8 ohms and heavy 16 kg chassis make it a capable partner for many traditional speakers. At this price, insist on a thorough demonstration: channel balance, controls, protection behavior, and operation under load matter because replacement output devices can be difficult to source.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
# Optonica
Optonica was a high-end audio subdivision of Sharp Corporation, the Japanese electronics manufacturer. Launched in 1975 (with some sources citing 1976), the brand was created to compete directly with established premium audio makers including Pioneer, Yamaha, Sansui, Nakamichi, and Marantz during the golden age of hi-fi. Sharp designed, built, and marketed Optonica products entirely in Japan, positioning the line as a serious contender in the luxury stereo market.
The brand's product portfolio centered on integrated amplifiers, receivers, and complete stereo systems aimed at discerning audiophiles. Optonica equipment was engineered to deliver high-fidelity sound reproduction across the mid-to-high power range, with models typically rated between 40 and 60 watts per channel. The brand maintained a focused approach, concentrating on core audio components rather than diversifying across numerous product categories.
Optonica's tenure in the high-end audio market proved relatively brief, effectively ending by 1982 as a serious competitor. The brand was revived in 1988 as a consumer electronics line encompassing stereo television receivers, VCRs, portable cassette players, and surround-sound receivers, but this iteration lacked the prestige of the original audio division. Production ceased entirely by 1991. Today, Optonica equipment from the late 1970s and early 1980s holds appeal among vintage audio collectors and enthusiasts seeking well-engineered Japanese hi-fi from that era.
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