Equipment photographs · 1
1 / 1 · Altec Voice of the Theatre line-up, led by the double-15-inch A-4 (FOH Fig. 11)
Altec Voice of the Theatre line-up, led by the double-15-inch A-4 (FOH Fig. 11)·FOH magazine; photographer not credited·Rights retained by the rights holder; reproduced for historical commentaryWhy it mattered
- 01
It corrected the mid-bass dip and cabinet resonance of the Shearer Horn and became the most widely used Voice of the Theatre model.
- 02
Before purpose-built touring boxes existed, A4-type cabinets were a reference for early large-venue live sound.
- 03
Kennedy's FOH survey calls the 1945 A-4 the first offering in the Voice of the Theatre line and the dominant post-war cinema and early arena system, using large front-loaded 210 bass horns with sectoral HF flares.
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
Many remained in cinema use decades after introduction[2]
Manuals & original documents
No authoritative manual or original document has been located for this profile.
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