ResonantLive Sound Archive

Equipment file · Three-way full-range loudspeaker

R-4

Clair Brothers · 1990s

Evidence status · documented

Identity and core specifications are documented; some historical fields remain unavailable.

The Clair R4 combines an 18-inch woofer, a 12-inch midrange and a 2-inch compression driver on a rotatable 90°×40° horn. The R4-IV uses Clair's Directional Baffle Midrange, an extension of the midrange cone shape instead of a horn.

Introduced
1990s
Category
Three-way full-range loudspeaker
Intended use
Touring and installed sound
Production
Clair Brothers, several generations (to R4-IV)

Why it mattered

  1. 01

    One of Clair's most widely used full-range boxes, on tour and in theatres and churches.

  2. 02

    Its DBM midrange aimed for intelligibility without horn harshness.

Engineering record

Drivers
18-inch LF, 12-inch mid, 2-inch compression driver on 90°×40° horn[1]
Output
137 dB SPL maximum; Baltic birch with aluminium corners[1]

Original pricing

No reliable period price located

2026 equivalent

Not calculated without a reliable original price.

Public price evidence was not sufficient to publish a defensible original figure.

Use in the field

No named deployment could be tied to this exact item by a checked source yet. Know of one? Suggest it on the contribute page.

Manuals & original documents

Sources

  1. 1R4-IV Full Range LoudspeakerClair Brothers · manual

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