AC-11B
| Brand | Heathkit |
| Manufacturer | Heath Company, Daystrom, Incorporated |
| Function | Radio Tuner (Multiplex Converter, Kit) |
| Produced | 1962 |
| Country | United States |
| Model ID | Multiplex Converter |
| Signal Path | Analog Hardware |
| Dimensions | 8.9 × 8.6 × 26.9 cm (W × H × D) |
| Weight | 4lbs (Shipped) |
| Power | 117VAC, 50/60Hz 12W |
| Frequency Response | 50Hz-15kHz ±2dB |
| Subcarrier Bandpass | 23kHz-53kHz ±4dB |
| Input Sensitivity | 0.4V |
| Input Impedance | 47kΩ |
| Output Impedance | 3kΩ |
| Channel Separation | 30dB |
| SNR | 55dB |
| Tube Complement | 12AU7 (x3) |
| Finish | Luggage Tan Vinyl |
| MSRP (1962) | $49.95 |
| Channels | 2 Channel |
| Links | Predecessor: AC-11 |