Leak Sandwich 150 (2024–)
The Leak Sandwich 150 carries a name with real history. The original Leak Sandwich, launched in 1961, was a landmark in cone design. The name came from its midwoofer construction, which sandwiched expanded polystyrene foam between two aluminum sheets. That gave a light, rigid, low-distortion diaphragm. The modern Sandwich 150 is a reissue built on the same technology, but it keeps only the principle, not the original parts. As one reviewer put it, "here only the technology remains."
The current model pairs a 6.5-inch (170mm) woofer with a sandwich-construction cone. The cone has two aluminum skins bonded to a PMI (polymethacrylimide) foam core, a material more commonly found in aviation. A 30mm coated textile dome tweeter takes over from 2.4kHz. The enclosure gets the same treatment. The walls are sandwich construction: a real walnut veneer outer layer, MDF, and a proprietary composite layer with glue filling the gaps to damp resonances. Knocking on the cabinet reportedly feels like knocking on stone. The front baffle is slightly recessed with aluminum trim, and the grilles attach magnetically. The rear panel carries a pair of bass reflex ports and a large aluminum plate with the terminals.
The 150 is the smaller sibling in a two-model lineup that includes the three-way Sandwich 250. It was available from mid-February 2024 at an RRP of £999 per pair. The design is deliberately retro-modern - "vintage style and modern technology" - and the review title from stereo.ru called it "balance without expiration date." That review also noted the speakers work fine on standard bookshelf stands, and that the 19.6-litre cabinet delivers bass down to 44Hz in-room.
Known specifications remain partial — frequency response is rated at 44Hz–26kHz ±3dB, sensitivity at 86.5dB, nominal impedance 6 ohms (4 ohm minimum, 8-ohm compatible), with a 25–150 watt power range. The cabinet is finished in walnut veneer. No production years beyond the 2024 launch, no weight or full dimensions, and no long-term reliability data are documented in the archive record.
- Type: 2-way bass reflex bookshelf/standmount loudspeaker
- Woofer: 6.5" (170mm) aluminum-foamcore sandwich cone
- Tweeter: 1.2" (30mm) coated textile dome
- Crossover: 2.4kHz
- Frequency response: 44Hz–26kHz (±3dB)
- Sensitivity: 86.5 dB
- Impedance: 6Ω nominal (4Ω minimum)
- Power handling: 25–150W
- Cabinet: 19.6-litre, sandwich-wall construction, walnut veneer
- Launch price: £999 per pair (2024)
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