Model Twenty-Seven
| Brand | KLH |
| Manufacturer | KLH Research & Development Corp. |
| Function | Receiver |
| Produced | 1968 |
| Country | United States |
| Form Factor | Standard Width |
| Signal Path | Analog Hardware |
| Dimensions | 34 × 11.4 × 37.5 cm (W × H × D) |
| Weight | 20.5lbs |
| Frequency Response | 6Hz-25kHz |
| Output Power (8Ω) | 25W |
| Output Power (IHF, 8/4Ω) | 37/50W |
| Power Bandwidth | 17Hz-20kHz |
| THD | 0.5% |
| IMD | 0.5% |
| IMD (1W) | 0.25% |
| SNR | 70dB |
| Sensitivity (Phono) | 1.3mV |
| Overload (Phono) | 105mV |
| Sensitivity (FM, IHF) | 2.5µV |
| Sensitivity (FM, 40dB Quieting) | 4µV |
| Sensitivity (FM, Full Quieting) | 10µV |
| Stereo Separation | 35dB |
| MSRP (1968) | $299.95 |
| Channels | 2 Channel |