Onkyo HS-201 (mid-1960s)

The HS-201 is an early Onkyo bookshelf speaker from the mid-1960s. It was priced at ¥12,000 per unit, a notable sum at a time when floor-standing speakers were still the norm and the bookshelf idea was only starting to catch on in Japan. It's a sealed (airtight) 2-way design with a 25 cm cone woofer and a 12 cm cone tweeter, rated at 8 Ω with a nominal 20W input.

The construction is the interesting part. The enclosure is 7-ply, 12-mm-thick plywood, fully packed with glass wool to suppress internal standing waves. Onkyo claimed the compact dimensions, 296 × 500 × 185 mm and 7.4 kg, came from deliberate development of the box and its damping materials, not from simply shrinking a floor-stander. The woofer uses Onkyo's own non-pre-cone paper with a roll edge formed by special molding. It's paired with a long voice coil meant to avoid distortion at large amplitudes. Frequency response was rated at 45 Hz to 20 kHz, with output sound pressure level of 97 dB/W or more.

Beyond the specifications, the record is thin. No production years, crossover frequency or reception information has surfaced. The HS-201 appears in period Japanese sources as an early example of Onkyo's move toward compact high-fidelity designs, but detailed contemporary reviews remain undocumented.

Type: 2-way, 2-speaker, airtight bookshelf system
Woofer: 25 cm cone / Tweeter: 12 cm cone
Frequency response: 45 Hz – 20 kHz
Output sound pressure: 97 dB/W or more
Impedance: 8 Ω; Nominal input: 20W
Dimensions: 296 × 500 × 185 mm; Weight: 7.4 kg
Original price: ¥12,000 (per unit, mid-1960s)

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Onkyo HS-201 (mid-1960s)

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