Model Thirty-Three
| Brand | KLH |
| Manufacturer | KLH Research & Development Corp. |
| Function | Speaker |
| Produced | 1970 |
| Country | United States |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 32.4 × 59.4 × 26.2 cm (W × H × D) |
| Treble | 1.75" Paper Cone |
| Midrange/Bass | 10" Paper Cone |
| Impedance (Nominal) | 8Ω |
| Crossover Frequency | 1.5kHz |
| Enclosure Type | Aperiodic |
| Enclosure Resonance | 54Hz |
| Finish | Walnut |
| MSRP (1972) | $99.95 |