S-33H
| Brand | Heathkit |
| Manufacturer | Daystrom Ltd. |
| Function | Amplifier, Integrated (Kit) |
| Produced | 1963 |
| Country | United Kingdom |
| Signal Path | Analog Hardware |
| Dimensions | 29.8 × 13.3 × 25.4 cm (W × H × D) |
| Power | 100-125/200-210/220-230/240-250VAC, 50/60Hz 50W |
| Output Power | 3.5W |
| THD (3W, 1kHz) | 0.6% |
| Input Sensitivity (Phono) | 50mV |
| Input Sensitivity (Tuner) | 100mV |
| Input Sensitivity (Aux) | 150mV |
| SNR (Phono) | 55dB |
| SNR (Tuner) | 66dB |
| Output Impedance | 3/15Ω |
| MSRP (1966) | £15 17s 6d |
| Channels | 2 Channel |
| Notes | Based on S-33 with additional stage to increase phono sensitivity. |