Beta II
| Brand | STR |
| Manufacturer | Sound Technology Research |
| Function | Speaker |
| Produced | 1976 |
| Country | United States |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 25.4 × 40.6 × 24.8 cm (W × H × D) |
| Frequency Response | 55Hz-24kHz ±5dB |
| Treble | 3" Paper Cone (Phenolic Ring, CTS) |
| Midrange/Bass | 8" Paper Cone |
| Impedance (Nominal) | 8Ω |
| Recommended Amplifier Power | 3-65W |
| Power Handling | 65W |
| Enclosure Type | Bass Reflex |
| Finish | Walnut-grained Vinyl |
| MSRP (1976) | $74.50 |