| Model ID | A-287-W |
| Form Factor | 19" Rackmount |
| Signal Path | Analog Hardware |
| Dimensions | 48.3 × 48.9 × 31.8 cm (W × H × D) |
| Weight | 141lbs |
| Power | 105/117/130VAC, 50/60Hz 700W |
| Frequency Response | 100Hz-10kHz ±1dB |
| Power Output | 250W (Requires 15W input from Altec A-127 series amplifier. May be paralleled with a second unit for 500W.) |
| Gain | 12dB |
| Topology | Class B |
| THD (250W) | 5% |
| SNR | 68dB |
| Noise Level (0.001W) | -20dB |
| Input Impedance | 3kΩ (Optional: 10Ω or 20Ω) |
| Load Impedance | 2.25Ω to 20Ω (Multiple Taps) |
| Output Tube | 805 |
| Tube Complement | 805 (x2), 866A (x2) |
| Finish | Blue Gray |
| MSRP (1947) | $822 (MSRP (1950): $913.33) |
| Channels | 1 Channel |
| Notes | High power (Class B) version of A-287F. |
