ST 404
| Brand | Pilot |
| Manufacturer | Pilot HiFi Acoustics GmbH |
| Designer | Bernd H. Rateitschak |
| Function | Speaker |
| Produced | 1989 |
| Country | Germany |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 28 × 95 × 25 cm (W × H × D) |
| Frequency Response | 22Hz-30kHz |
| Treble | Dome |
| Midrange | Dome |
| Midbass | Cone |
| Bass | Cone |
| Impedance (Nominal) | 8Ω |
| Crossover Frequencies | ??Hz, 650Hz, 3.5kHz |
| Recommended Amplifier Power (RMS) | 30-150W |
| Power Handling | 120W |
| Power Handling (Peak) | 400W |
| Enclosure Type | Bass Reflex |
| Finish | Mahogany, Walnut, Pine, Black, White |
| MSRP (1989) | DM 1000 |