MA-BB
| Brand | Matrecs |
| Manufacturer | Matrecs Industries Inc. |
| Series | Black Box |
| Function | Speaker |
| Produced | 1980 |
| Country | United States |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 15.2 × 22.9 × 12.7 cm (W × H × D) |
| Weight | 5.5lbs |
| Frequency Response | 50Hz-22kHz |
| Treble | 2.5" Piezo |
| Midrange/Bass | 4.5" Cone |
| Impedance (Nominal) | 4Ω |
| Crossover Frequency | 2.5kHz |
| Recommended Amplifier Power | 2-50W |
| Power Handling | 50W |
| Enclosure Type | Sealed |
| MSRP (1980) | $125 |