AA-20
| Brand | Heathkit |
| Manufacturer | Heath Company, Daystrom, Incorporated |
| Function | Amplifier, Pre (Kit) |
| Produced | 1960 |
| Country | United States |
| Signal Path | Analog Hardware |
| Dimensions | 33.3 × 9.7 × 16.3 cm (W × H × D) |
| Weight | 7lbs (Shipped) |
| Power | 117VAC, 50/60Hz 17.5W |
| Frequency Response | 20Hz-20kHz ±1dB |
| Input Sensitivity (Mag Phono) | 4mV |
| Input Sensitivity (Crystal Phono) | 0.15V |
| Input Sensitivity (Aux) | 0.2V |
| Output Voltage | 2.5V |
| THD (Mag Phono) | 0.2% |
| THD (Aux) | 0.15% |
| IMD (2.5V) | 0.05% |
| SNR (Mag Phono) | 50dB |
| SNR (Aux) | 65dB |
| Channel Separation | 45dB |
| Tube Complement | 12AX7 (x5) |
| Finish | Black and Gold |
| MSRP (1960) | $34.95 |
| Channels | 2 Channel |
| Links | Successor: AA-141 |