AD-9501
| Brand | Heathkit |
| Manufacturer | Heath Company, Schlumberger Limited |
| Function | Effect (SQ Quad Decoder, Kit) |
| Produced | 1974 |
| Country | United States |
| Signal Path | Analog Hardware |
| Dimensions | 25 × 6 × 15.2 cm (W × H × D) |
| Power | 120/240VAC, 50/60Hz 5W |
| Frequency Response | 50Hz-15kHz |
| Input Sensitivity | 2mV |
| Input Impedance | 49kΩ |
| SNR | 60dB |
| THD | 0.15% |
| Channels | 4 Channel |
| Links | Successor: AR-1500A |