814A Extenda-Voice
| Brand | Altec, Altec Lansing |
| Manufacturer | Altec Corporation |
| Function | Speaker |
| Produced | 1973 |
| Country | United States |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 50.8 × 50.8 × 30.5 cm (W × H × D) |
| Weight | 40lbs |
| Frequency Response | 100Hz-2.5kHz |
| Driver | 15" Paper Cone (Altec 421A) |
| Sensitivity (300Hz-800Hz) | 100dB/W/4' |
| Sensitivity (EIA) | 53dB |
| Impedance (Nominal) | 8Ω |
| Crossover Frequency (Recommended) | 300Hz, 500Hz, 800Hz |
| Crossover Slope (Recommended) | 12dB/Oct (Second Order) |
| Enclosure Type | Aperiodic |
| Finish | Gray |