831A Capistrano
| Brand | Altec, Altec Lansing |
| Manufacturer | Altec Lansing Corporation |
| Function | Speaker |
| Produced | 1957 |
| Country | United States |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 119.4 × 76.2 × 59.7 cm (W × H × D) |
| Weight | 120lbs (Shipped) |
| Frequency Response | 35Hz-22kHz |
| Treble | 8.6"x18.4" Sectoral Horn (Altec 802, Altec 811B) |
| Midrange/Bass | 15" Paper Cone (Altec 803A) |
| Impedance (Nominal) | 16Ω |
| Power Handling | 30W |
| Enclosure Type | Bass Reflex |
| Finish | Walnut, Blond, Mahogany |
| MSRP (1957) | $381 |