description Leak Sandwich Overview
The Leak Sandwich is a portable loudspeaker originally produced by Edmund Tomlinson’s Leak Stereo Laboratory in the late 1960s, notable for its distinctive sandwich-like construction and use of a unique, high-quality ribbon tweeter driver.
help Leak Sandwich FAQ
Was the original Leak Sandwich a portable speaker?
No. The original Leak Sandwich was a large home hi-fi loudspeaker introduced in 1961, with a walnut cabinet and a roughly 60-liter enclosure. A listing that calls it portable is likely confusing it with another Leak model or using the word loosely. [Contemporary review](https://www.worldradiohistory.com/Archive-All-Audio/Archive-High-Fidelity/60s/High-Fidelity-1962-Dec.pdf)
Why was the Leak Sandwich called Sandwich?
The main diaphragm used a lightweight foam core held between thin aluminum skins. That layered construction made the cone stiff and light, helping reduce unwanted flexing and resonance. [LEAK history](https://leak-hifi.co.uk/pages/our-story)
Did the original Leak Sandwich use a ribbon tweeter?
The original 1961 specification describes a two-way system with a 13-inch woofer and a 3.5-inch tweeter, not a ribbon tweeter. If a listing claims a ribbon driver, check the exact model number because later Leak variants used different driver arrangements. [Contemporary review](https://www.worldradiohistory.com/Archive-All-Audio/Archive-High-Fidelity/60s/High-Fidelity-1962-Dec.pdf)
What amplifier does a vintage Leak Sandwich need?
The original system was specified at a nominal 15 ohms, so the amplifier should be comfortable driving an unusual high-impedance vintage load. Leak amplifiers from the same era are a natural historical pairing, but the condition of the crossover, wiring, and drivers matters more than the brand name alone.
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