| Model ID | A-287-W |
| Signal Path | Analog Hardware |
| Dimensions | 51.1 × 60.7 × 33 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 | -27.8dB |
| Input Impedance | 3kΩ |
| Load Impedance | 2.25Ω to 20Ω (Multiple Taps) |
| Output Tube | 805 |
| Tube Complement | 805 (x2), 866A (x2) |
| Finish | Gray |
| MSRP (1951) | $715 |
| Channels | 1 Channel |
| Notes | A-287W in wall-mountable cabinet. |
