A-255A
| Brand | Altec, Altec Lansing |
| Manufacturer | Altec Lansing Corporation |
| Function | Amplifier, Power |
| Produced | 1946 |
| Country | United States |
| Model ID | A-255-A |
| Form Factor | 19" Rackmount |
| Signal Path | Analog Hardware |
| Dimensions | 48.3 × 35.6 × 0 cm (W × H × D) |
| Weight | 55lbs |
| Power | 105/117/130VAC, 50/60Hz 200W |
| Frequency Response | 20Hz-20kHz ±1dB |
| Power Output | 40W |
| Gain | 65dB |
| THD (40W) | 2% |
| IMD (40W) | 8% |
| Input Impedance | 30/50Ω, 250/300Ω, 500/600Ω |
| Load Impedance | 500Ω, 750Ω, 2kΩ, 3kΩ |
| Output Tube | 807 |
| Tube Complement | 807 (x2), 6SJ7 (x2), 6V6, 5R4GY (x2), 5U4G |
| MSRP (1947) | $354 |
| Channels | 1 Channel |