Milestone 604
| Brand | Altec Lansing, Altec |
| Function | Speaker |
| Produced | 1996 |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 46.5 × 90.5 × 50.5 cm (W × H × D) |
| Weight | 55kg |
| Frequency Response | 40Hz-20kHz |
| Driver | 15" Coaxial Horn/Paper Cone (Altec 604-8K) |
| Sensitivity | 100dB/W/m |
| Impedance (Nominal) | 8Ω |
| Crossover Frequency | 1.6kHz |
| Power Handling | 75W |
| Enclosure Type | Bass Reflex |
| MSRP (1996) | ¥560,000 |