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1 / 1 · Clair Brothers S4 — a later version of the 1974 design (FOH Fig. 4)
Clair Brothers S4 — a later version of the 1974 design (FOH Fig. 4)·FOH magazine; photographer not credited·Rights retained by the rights holder; reproduced for historical commentaryWhy it mattered
- 01
Put bass, midrange, high-frequency, and super-high-frequency sections into one repeatable road enclosure.
- 02
Its truck-conscious dimensions, rigging evolution, and modular deployment helped standardize large touring inventories.
- 03
Kennedy's FOH survey describes the 1974 S4 as a 405-pound four-way box with two 18-inch woofers, four 10-inch mids, two 2-inch-throat HF drivers and two ring-radiator UHF drivers on a 45-inch square baffle, its cone drivers aligned to couple with adjacent cabinets.
Original pricing
No reliable original price located
2026 equivalent
Not calculated without a reliable original price.
The S-4 was sold into professional touring inventories; no defensible launch list price was found.
Use in the field
The S-4 debuted in Asia with the Moody Blues, Elton John, and Rod Stewart and the Faces; a hanging version followed for the Rolling Stones' 1975 Tour of the Americas.[1]
Manuals & original documents
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