Model Three
| Brand | KLH |
| Manufacturer | KLH Research & Development Corp. |
| Function | Speaker |
| Produced | 1957 |
| Country | United States |
| Model ID | 3 |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 63.5 × 34.3 × 30.5 cm (W × H × D) |
| Weight | 42lbs (Shipped) |
| Frequency Response | ??Hz-1.5kHz |
| Driver | 12" Paper Cone |
| Impedance (Nominal) | 16Ω |
| Enclosure Type | Sealed |
| Enclosure Volume | 1.5ft³ |
| Finish | Mahogany, Birch, Walnut |
| MSRP (1960) | $174 (Walnut: $181) |
| Notes | Model Two with space for JansZen 1-30 electrostatic tweeter array removed. |