A6A/MRII564A
| Brand | Altec Lansing, Altec |
| Manufacturer | Altec Corporation |
| Series | Voice of the Theatre |
| Function | Speaker |
| Produced | 1983 |
| Country | United States |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 76.2 × 124.5 × 48.3 cm (W × H × D) |
| Weight | 152lbs |
| Frequency Response | 40Hz-15kHz |
| Treble | 12.2"x12.9" Constant Directivity Horn (Altec Lansing MR II 564A, Altec Lansing 288-8K) |
| Midrange/Bass | 16" Paper Cone (x2) (Altec Lansing 3156) |
| Impedance (Nominal) | 8Ω |
| Crossover Frequency | 500Hz, 800Hz (Recommended: 500Hz, Altec Lansing N8500-8A) |
| Dispersion (Horizontal) | 60° |
| Dispersion (Vertical) | 40° |
| Enclosure Type | Bass Reflex (Altec Lansing 8256X) |
| Finish | Gray |