Luxman 20H42 (1962)

The Luxman 20H42 is a bookshelf-type speaker system released in September 1962 at ¥24,000 per unit. It's an early and somewhat unusual Luxman design. It's a three-way, three-driver sealed enclosure with a 20 cm cone woofer and horn-type drivers for both the midrange (SH-35) and the highs (TH-7). The crossover points are 600 Hz and 3.5 kHz, with a 12 dB/octave slope.

Documentation on the 20H42 is thin. No reviews, owner impressions, or production-run details survive in the record. The specification sheet is solid, though. The enclosure is airtight (sealed), with an internal volume of 40 liters. Frequency response is rated at 60 Hz to 17 kHz, maximum allowable input is 15W, and impedance is 16Ω. The cabinet measures 360 mm wide by 660 mm high by 250 mm deep, and weighs 14.3 kg.

Known specs, in short:

• Type: 3-way, 3-speaker, sealed bookshelf
• Woofer: 20 cm cone; Midrange: horn (SH-35); Tweeter: horn (TH-7)
• Frequency response: 60 Hz – 17 kHz
• Max input: 15W; Impedance: 16Ω
• Crossover: 600 Hz, 3.5 kHz, 12 dB/oct.
• Internal volume: 40L
• Dimensions: 360 × 660 × 250 mm (W×H×D); Weight: 14.3 kg

Outside its listing in period equipment directories, almost nothing else is recorded about the 20H42. There is no market data, no list of common issues, and no sign of where it sat in Luxman's early-1960s lineup.

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