Tannoy Lancaster Rectangular 15 (1958–1967)
At 29.5 kg, each cabinet carries the weight of a generation’s obsession with British hi-fi.
Overview
The Tannoy Lancaster Rectangular 15 is a cabinet built when form followed function and enclosures were meant to last decades. It stands 85cm tall and is clad in lumber core plywood. It was designed to fit into a living room while giving you the full-range punch of Tannoy's dual concentric drivers. Owners report the size sat right at the edge of acceptable furniture dimensions for 1960s homes, yet was still big enough to command attention. The cabinet was engineered as a universal platform, compatible with both 12" and 15" Tannoy drivers, though it was most commonly paired with the larger unit, especially the Monitor Red, Gold, and Silver variants. Collectors note a trade-off. With the more dynamic 15" drivers, particularly the "hard edged" models, the enclosure reportedly restricted low-end dynamics because of a compressed air cushion behind the driver. The design moved from an early vented port configuration to a true reflex alignment based on Thiele & Small principles, which meant a more scientifically tuned bass response. Electrically, it is a 2-way, single-driver system. The dual concentric unit handles both high and low frequencies.
Specifications
| Manufacturer | Tannoy |
| Product type | Loudspeaker enclosure/cabinet |
| Production years | 1958–1967 |
| Dimensions | 85cm height x 52cm width x 28cm depth |
| Driver compatibility | Designed for use with 12" and 15" Tannoy dual concentric units |
| Cabinet type | Design evolved from a vented port to a true reflex (Thiele & Small) alignment |
| Construction material | Lumber core plywood |
| Type | 2 way, single driver loudspeaker system |
| Weight | 29.5 kg (65lb) each |
Historical Context
Tannoy launched the Lancaster line in the late 1950s as part of a push to standardize cabinet designs across driver sizes. One enclosure could take both 12" and 15" dual concentric units. That flexibility made it one of the company's best-selling cabinet designs, and it stayed in production for nearly a decade. By the mid-1970s the Lancaster had evolved into the structurally reinforced Berkeley, which has the same dimensions, and that ended the original production run. The Lancaster sat between hand-built British craftsmanship and the emerging era of scientific speaker design. Its shift to Thiele & Small-aligned reflex tuning followed a broader industry move toward measurable performance.
Collectibility & Value
The Tannoy Lancaster Rectangular 15 has a cult following, though verified market data is sparse. A pair listed as "Tannoy GRF Rectangular Monitor Red 15" surfaced for C $31,000.98 in pre-owned condition, which suggests high-end demand when original drivers and cabinets are preserved. An earlier listing from 2017 asked a much more modest $3000 (negotiable), so valuations swing widely with condition and provenance. Collectors often discuss cabinet restoration and upgrades in enthusiast forums, and active communities monitor used listings on platforms like Hifi Shark.
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