Model Four
| Brand | KLH |
| Manufacturer | KLH Research & Development Corp. |
| Function | Speaker |
| Produced | 1957 |
| Country | United States |
| Form Factor | Bookshelf / Stand Mounted |
| Signal Path | Passive Hardware |
| Dimensions | 63.5 × 34.3 × 30.5 cm (W × H × D) |
| Treble | Paper Cone |
| Midrange/Bass | 12" Paper Cone |
| Impedance (Nominal) | 16Ω |
| Enclosure Type | Sealed |
| MSRP (1957) | $231 |
| Controls |
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