A1-X (1004) (Rev. 2)
| Brand | Altec |
| Manufacturer | Altec Lansing Corporation |
| Series | Voice of the Theatre |
| Function | Speaker |
| Produced | 1949 |
| Country | United States |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Treble | 2x5 Multicellular Horn (Altec 1004, Altec 288B (x4)) |
| Midrange/Bass | 15" Paper Cone (x6) (Altec 515) |
| Impedance (Nominal) | 12Ω |
| Crossover Frequency | 500Hz (Altec N-500-C) |
| Dispersion (Horizontal) | 110° |
| Dispersion (Vertical) | 40° |
| Power Handling | 200W |
| Enclosure Type | Front-Loaded Horn, Bass Reflex |
| Notes | Redesigned cabinet. Compression driver updated. |