H.J. Leak & Co. · Leak loudspeakers

Leak Sandwich

The Sandwiched-diaphragm loudspeaker of 1961 - Leak's most ambitious speaker project and the reason the name still appears on modern "Sandwich" models.

Catalogue code: Sandwich
Years: 1961
Type: loudspeaker
Valves & speakers: Loudspeaker with a polystyrene-cored aluminium sandwich diaphragm (Dr Don Barlow design)
Lifecycle: retired
Confidence: Medium

Specifications

Technology: moving coil
Channels: 1

Safety

Drive units are unobtainable: value rests on complete, original cabinets.

01 / Witnesses

What applies here

Marks that can be entered for this maker: Model / catalogue number, Model / catalogue number, British capacitor code (Hunts, Mullard), Japanese capacitor code (Nichicon, Chemi-Con, ELNA), EIA component code, Chassis / platter stamp.

02 / Bounds

The model year is a floor

Nothing predates 1961; components only push the date later.

03 / Value

What moves the price

Sold-price aggregates are not collected yet, so the archive gives no figure — condition, originality of the transformers and a documented recap move this model more than any list price.