RFS-1
| Brand | Marjen |
| Manufacturer | Marjen Company, Inc. |
| Function | Speaker |
| Produced | 1977 |
| Country | United States |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 30.5 × 53.3 × 22.9 cm (W × H × D) |
| Weight | 32lbs |
| Frequency Response | 44Hz-20kHz ±3dB |
| Treble | 2" Paper Cone |
| Midrange/Bass | 8" Paper Cone |
| Impedance (Nominal) | 8Ω |
| Crossover Frequency | 2kHz |
| Enclosure Type | Sealed |
| Finish | Pine |
| MSRP (1977) | $99 |