Black Box Mark III
| Brand | Frazier |
| Manufacturer | International Electronics Corporation |
| Designer | J.A. Frazier |
| Function | Speaker |
| Produced | 1960 |
| Country | United States |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 57.2 × 66 × 40.6 cm (W × H × D) |
| Weight | 59lbs (Shipped) |
| Frequency Response | 30Hz-17kHz |
| Treble | Horn |
| Midrange/Bass | 12" Paper Cone |
| Enclosure Type | Bass Reflex |
| Finish | Black |
| MSRP (1960) | $135 |