Leak Delta 30 (1976)

The Leak Delta 30 is a stereo integrated amplifier produced in 1976, priced at £103 at launch. The name and the power rating line up neatly: it delivers 30W RMS per channel. Beyond that, the documented record is genuinely thin — the primary source that confirms the model name, the Leak Hifi Archive, survives only as a truncated Google cache, leaving the design details of the page inaccessible.

What is confirmed from period directories and specification listings: input sensitivity is 1.5mV for moving-magnet phono and 100mV for high-level sources. Physical dimensions are listed as 18½ x 11 x 3½ inches (47 x 28 x 9 cm), though the original source leaves the units ambiguous in its copy. No weight, frequency response, distortion figures, or circuit topology details have survived in the available record.

The Delta 30 appears to have been part of Leak's Delta range of the mid-1970s — a lineup that, per the company's own exhibition materials, encompassed loudspeakers, receivers, amplifiers, turntables, and tuners, with the range displayed as new at the International Audio Festival and Fair around 1970. The Delta 30 itself, however, dates from later in the decade, and no period review of this specific model has surfaced in the publications searched. Studio Sound (1971, p.59) covered the Delta range's debut at the Festival, but the Delta 30 is not individually described there.

For collectors, the essential facts are these: a 1976 British integrated amplifier from a respected name, 30W per channel, £103 new. The rest — how it sounded, how it was built — remains undocumented in accessible sources. If you own one, the Archive would welcome hearing from you.

Type: Stereo integrated amplifier
Power output: 30W RMS per channel
Input sensitivity: 1.5mV (MM), 100mV (high level)
Dimensions: 18½ x 11 x 3½ in (47 x 28 x 9 cm)
Price: £103 (1976)