A4A-X/1505B
| Brand | Altec Lansing, Altec |
| Series | Voice of the Theatre |
| Function | Speaker |
| Produced | 1980 |
| Country | United States |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 208.3 × 275.6 × 100.3 cm (W × H × D) |
| Weight | 646lbs |
| Frequency Response | 40Hz-15kHz |
| Treble | 3x5 Multicellular Horn (Altec 1505B, Altec 30172, Altec 288-16K (x2)) |
| Midrange/Bass | 15" Paper Cone (x2) (Altec 515E) |
| Impedance (Nominal) | 16Ω |
| Crossover Frequency | 500Hz (Altec N500F) |
| Dispersion (Horizontal) | 105° |
| Dispersion (Vertical) | 60° |
| Enclosure Type | Front-Loaded Horn, Bass Reflex (Altec 210) |