Denon S-270MKII (c. 1976)

The Denon S-270MKII is a bookshelf-type, bass-reflex 3-way speaker system from the mid-1970s. The record on this model is thin. Nearly everything known traces back to a single spec database entry, with the price noted as around 1976. It weighs 21 kg and stands 647 mm tall, which is fairly substantial for its class.

The driver lineup is a 25 cm cone woofer for the lows, a 10 cm cone "squaker" for the midrange, and a 5 cm cone tweeter for the highs. Crossovers sit at 500 Hz and 1.7 kHz. The midrange and high frequencies each get their own continuously variable level control, so the listener can tailor the balance. The enclosure is described as having a symmetrical design. Rated impedance is 8 Ω, with a maximum allowable input of 80W (program source) and an average output sound pressure level of 90 dB/W/m. Frequency response is specified at 50 Hz to 20 kHz ± 4 dB.

Known specs, as documented:

- **Type:** 3-way, 3-speaker, bass reflex, bookshelf

- **Drivers:** 25 cm cone woofer, 10 cm cone midrange, 5 cm cone tweeter

- **Frequency response:** 50 Hz - 20 kHz ± 4 dB

- **Crossover frequencies:** 500 Hz, 1.7 kHz

- **Impedance:** 8 Ω

- **Max input:** 80W (program source)

- **Sensitivity:** 90 dB/W/m

- **Dimensions:** 360 × 647 × 298 mm (W×H×D)

- **Weight:** 21 kg

- **Original price:** ¥54,500 (one unit)

Beyond the database entry, almost nothing survives in the way of period reviews or owner commentary. Used listings in Japan have sold for between ¥1,000 and ¥6,435 in recent years. Some were described as junk, others as confirmed with a simple sound-out. These units still turn up on the secondary market but draw little collector attention. No production years beyond the circa-1976 price notation have been confirmed. Nothing has surfaced on the model's place in Denon's lineup, common failures, or maintenance.

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