Model One (Utility)
| Brand | KLH |
| Manufacturer | KLH Research & Development Corp. |
| Function | Speaker |
| Produced | 1960 |
| Country | United States |
| Form Factor | Floorstanding |
| Signal Path | Passive Hardware |
| Dimensions | 63.5 × 69.9 × 40.6 cm (W × H × D) |
| Frequency Response | ??Hz-1.5kHz |
| Driver | 12" Paper Cone (x2) (Impedance: 32Ω) |
| Impedance (Nominal) | 16Ω |
| Enclosure Type | Sealed |
| Enclosure Volume | 2.25ft³ (x2) (Total: 5ft³, Internally divided) |
| MSRP (1960) | $336 |
| Notes | Space for JansZen 1-30 tweeter array removed for more compact enclosure. |