Model One (Rev. 2)
| Brand | KLH |
| Manufacturer | KLH Research & Development Corp. |
| Function | Speaker |
| Produced | 1957 |
| Country | United States |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Frequency Response | ??Hz-1.5kHz |
| Driver | 12" Paper Cone (x2) (Impedance: 32Ω) |
| Impedance (Nominal) | 16Ω |
| Enclosure Type | Sealed |
| MSRP (1957) | $378 |
| Notes | Intended for use with 16Ω Janszen 1-30 electrostatic tweeter array. Cabinet size reduced. Limited production, pre-serial numbers. |