Bang & Olufsen Beovox S30 (1978–1981)
The Beovox S30 is a compact two-way bookshelf loudspeaker from Bang & Olufsen's late-1970s lineup, produced from 1978 to 1981. It's a sealed-box (infinite baffle) design with a 5″ cone woofer and a ¾″ dome tweeter, crossing over at 3 kHz. The cabinet is small - 38 × 21 × 20 cm and just 4.2 kg - and came in four finishes: walnut, rosewood, black ash, and white. Connection is a single pair of spring-loaded push terminals.
The two main sources mostly agree on specs. Both give 8-ohm impedance and 88 dB sensitivity. They split on low-end frequency response (62 Hz vs. 65 Hz) and power handling (50 W vs. 40 W). A later S30.2 revision may explain that, since the sources don't always agree on which version they're describing. Dimensions and weight are identical across both S30 and S30.2 records.
What's documented about the S30's real-world life is mostly practical. One forum user mentions running a pair as rear speakers in a living room setup. The known failure points are the woofer surround foam, which rots and needs re-foaming, and the tweeter, which is prone to failure and hard to replace. A used pair in good cosmetic condition recently sold on eBay for £95. The record has no original retail price and no detailed circuit-level information.
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