A1-X (1504) (Rev. 2)
| Brand | Altec |
| Manufacturer | Altec Lansing Corporation |
| Series | Voice of the Theatre |
| Function | Speaker |
| Produced | 1949 |
| Country | United States |
| Model ID | A-1-X |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 386.1 × 287 × 100.3 cm (W × H × D) |
| Weight | 2200lbs (Shipped) |
| Treble | 3x5 Multicellular Horn (Altec 1504, Altec 288B (x4)) |
| Midrange/Bass | 15" Paper Cone (x6) (Altec 515) |
| Crossover Frequency | 500Hz (Altec N-500-C) |
| Dispersion (Horizontal) | 105° |
| Dispersion (Vertical) | 60° |
| Power Handling | 200W |
| Enclosure Type | Front-Loaded Horn, Bass Reflex |
| Notes | Driver updates and redesigned cabinet. |