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1 / 1 · Western Electric 555-W driver on a 12-A exponential horn (FOH Fig. 6)
Western Electric 555-W driver on a 12-A exponential horn (FOH Fig. 6)·FOH magazine; photographer not credited·Rights retained by the rights holder; reproduced for historical commentaryWhy it mattered
- 01
With the 555-W it made talking pictures intelligible in large theatres.
- 02
It set the template for the large folded theatre horns of the early 1930s, such as the 15-A.
- 03
Kennedy's FOH survey describes the 12-A as an exponentially tapered horn with an 11-foot pathway, shown carrying the 555-W compression driver.
Engineering record
- Dimensions
- 45 × 45-inch mouth, 11-foot folded exponential path[1]
Original pricing
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2026 equivalent
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Use in the field
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Manuals & original documents
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