Exposure 25 (1983–1986)
The Exposure 25 came out in 1983 at around £300. John Farlowe designed it as the successor to the Exposure IV - it started life as a revision of the IV before becoming its own model. It later gave way to the 25 II. Audio (December 1985, p.126) listed the Exposure 25 among available audio components in a classified advertisement.
The design is minimalist. The signal path is short, there is no unnecessary circuitry, and the amp is meant to sound good with a wide range of speakers. It's a transistor design with a toroidal transformer, tone defeat circuitry, two microphone inputs, and preamp outputs. The fact sheet gives two different power figures: one entry says 65W per channel, another says 22Wpc into 8 ohms / 40Wpc into 4 ohms. Both come from the same source, so which one is correct is unsettled. Input impedance is 47kΩ, and THD is rated at 0.1% at 30W.
The 25 arrived while British brands like Naim, Linn, and Exposure were pushing back against Japanese dominance of the market. It was praised for its clarity, musicality, and reliability. Reviewers describe the sound as detailed and dynamic, with a warm, natural character, and it pairs well with vintage speakers like the KEF 104aB and Spendor BC1. Hi-Fi Review noted it remains popular on the used market, with prices rising in recent years. The one commonly mentioned maintenance issue is that the potentiometer may need cleaning after all these decades.
Beyond that, the record is thin — no dimensions, weight, frequency response, or S/N figures are documented. But as a sought-after piece of British amplifier history, the 25 doesn't really need a spec sheet to carry its reputation.
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