857 A/S
| Brand | Altec |
| Function | Speaker |
| Produced | 1970 |
| Country | United States |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 51 × 78 × 40 cm (W × H × D) |
| Frequency Response | 35Hz-22kHz |
| Driver | 15" Coaxially Horn/Paper Cone (Altec 604E) |
| Sensitivity | 101dB/W/4' |
| Impedance (Nominal) | 8Ω or 16Ω (User Selectable) |
| Crossover Frequency | 1.5kHz |
| Dispersion (Horizontal) | 90° |
| Dispersion (Vertical) | 40° |
| Power Handling (RMS) | 35W |
| Power Handling (Peak) | 50W |
| Enclosure Type | Bass Reflex |
| Notes | European model with Altec Duplex driver preinstalled in 857A cabinet. |