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For Sale: Optonica / Sharp SM-1616 Vintage Integrated AmplifierA beautiful and powerful Optonica SM-1616 integrated amplifier from the golden age of hi-fi.- Classic late 1970s Japanese build quality- Warm, detailed and dynamic sound- Phono input for turntablesA rare opportunity to own a sought-after vintage amplifier from Optonica, Sharp's high-end audio division. Perfect for vinyl enthusiasts and collectors looking for authentic vintage sound.For more information, visit my website:VintAudio.comSpecifications:Power output: 40 watts per channel into 8Ω (stereo)Frequency response: 15Hz to 60kHzTotal harmonic distortion: 0.2%Damping factor: 40Input sensitivity: 2.5mV (MM), 150mV (line)Output: 150mV (line), 30mV (DIN)Dimensions: 442 x 144 x 253mmWeight: 7.8kg
The SM-1616 has a solid vintage following: compact, well-built, and known for a warm, musical presentation with a capable phono stage. At US$296, this is a touch above the recent median of US$263 and just over the 75th percentile of US$280, so it reads as slightly ambitious rather than a standout bargain.
That doesn’t make it a bad buy if it’s clean and fully sorted. For this model, the real appeal is the lively, easygoing sound and the tidy power level that suits efficient speakers or a second system well. At this price, I’d want reassurance on function, quiet controls, and evidence of recent servicing; if it’s original, unmolested, and ready to play, it’s still a reasonable enthusiast piece.
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.
See all Optonica listings on RADAR.
