A4 (1005)
| Brand | Altec |
| Manufacturer | Altec Lansing Corporation |
| Series | Voice of the Theatre |
| Function | Speaker |
| Produced | 1945 |
| Country | United States |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 204.5 × 260.4 × 100.3 cm (W × H × D) |
| Weight | 800lbs (Shipped) |
| Treble | 2x5 Multicellular Horn (Altec 1005, Altec 288) |
| Midrange/Bass | 15" Paper Cone (x2) (Altec 515) |
| Impedance (Nominal) | 12Ω |
| Crossover Frequency | 500Hz (Altec N-500-C) |
| Dispersion (Horizontal) | 100° |
| Dispersion (Vertical) | 40° |
| Power Handling | 40W |
| Enclosure Type | Front-Loaded Horn, Bass Reflex |
| MSRP (1947) | $700 (Installation Supervision: $70) |