Mark IV-D
| Brand | Frazier |
| Manufacturer | Frazier Incorporated |
| Function | Speaker |
| Produced | 1981 |
| Country | United States |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 35.6 × 61 × 30.5 cm (W × H × D) |
| Weight | 44lbs (Shipped) |
| Frequency Response | 40Hz-22kHz |
| Treble | 1" Dome |
| Midrange/Bass | 10" Paper Cone |
| Sensitivity | 96dB/W/m (In Room) |
| Impedance (Nominal) | 8Ω |
| Crossover Frequency | 3kHz |
| Crossover Slope | 12dB/Oct (Second Order) |
| Power Handling | 75W |
| Enclosure Type | Bass Reflex |
| Finish | Walnut |
| MSRP (1981) | $254.50 |