AD-1304
| Brand | Heathkit |
| Manufacturer | Heath Company, Schlumberger Limited |
| Function | EQ (Noise Reduction, Kit) |
| Produced | 1978 |
| Country | United States |
| Model ID | Active Audio Processor |
| Form Factor | Standard Width |
| Signal Path | Analog Hardware |
| Dimensions | 44.5 × 11.4 × 20.6 cm (W × H × D) |
| Weight | 10lbs (Net), 12lbs (Shipped) |
| Power | 120/240VAC, 50/60Hz 15W |
| Frequency Response | 20Hz-20kHz +0/-0.2dB |
| Input Sensitivity | 200mV |
| Input Overload | 5V |
| Input Impedance | 100kΩ |
| Noise Reduction (4kHz-15kHz) | 10dB |
| THD | 0.1% |
| SNR | 70dB |
| Channel Separation (1kHz) | 50dB |
| Output Impedance | 500Ω |
| MSRP (1978) | $199.95 |
| Channels | 2 Channel |