Imperial III
| Brand | Marantz |
| Manufacturer | Marantz, Co., Inc., Superscope, Inc., Mitsubishi Electric Corporation |
| Function | Speaker |
| Produced | 1970 |
| Country | United States |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 34.3 × 58.4 × 30.5 cm (W × H × D) |
| Weight | 40lbs |
| Frequency Response | 30Hz-20kHz |
| Supertweeter | 1" Dome |
| Treble | 2" Dome |
| Midrange/Bass | 12" Paper Cone |
| Imperial (Nominal) | 8Ω |
| Crossover Frequencies | 1.5kHz, 6kHz |
| Power Handling | 100W |
| Enclosure Type | Sealed |
| Finish | Walnut |
| MSRP (1970) | $199 |
| Notes | Built under contract for Marantz by Mitsubishi. Based on the Diatone DS-301. |