A4/1505B (1982)
| 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 | 639lbs |
| Frequency Response | 40Hz-15kHz |
| Treble | 3x5 Multicellular Horn (Altec 1505B, Altec 30166, Altec 288-16K) |
| Midrange/Bass | 15" Paper Cone (x2) (Altec 515E) |
| Sensitivity | 109dB/W/m |
| Impedance (Nominal) | 16Ω |
| Crossover Frequency | 500Hz (Altec N500FA) |
| Dispersion (Horizontal) | 105° |
| Dispersion (Vertical) | 60° |
| Power Handling | 60W |
| Enclosure Type | Front-Loaded Horn, Bass Reflex (Altec 210) |
| Notes | A4A/1505B with crossover update |