AA-71
| Brand | Heathkit |
| Manufacturer | Heath Company, Daystrom, Incorporated |
| Function | Amplifier, Power (Kit) |
| Produced | 1961 |
| Country | United States |
| Signal Path | Analog Hardware |
| Dimensions | 39.4 × 17.8 × 22.4 cm (W × H × D) |
| Weight | 24lbs (Shipped) |
| Power | 117VAC, 50/60Hz 115W |
| Frequency Response | 30Hz-15kHz ±1dB (20W) |
| Output Power ("Hi-Fi") | 20W |
| IHFM Music Power Output (0.7% THD, 1kHz) | 20W |
| Impedance Load | 4/8/16Ω |
| Input Sensitivity | 2V |
| THD (20W, 30Hz-15kHz) | 2% |
| IMD (20W, 60Hz:6kHz, 4:1) | 2% |
| SNR (20W) | 95.2dB |
| Damping Factor | 28.5 |
| Output Tube | 5881 |
| Tube Complement | 5881 (x2), 6SN7 (x2), 5V4 |
| Finish | Black and Ivory |
| MSRP (1961) | $41.44 |
| Channels | 1 Channel |
| Links | Predecessor: W-4B |
| Notes | Updated W-4B |