FM-100X
| Brand | Monarch |
| Manufacturer | Monarch Electronics International, Inc. |
| Function | Radio Tuner |
| Produced | 1964 |
| Country | United States |
| Signal Path | Analog Hardware |
| Dimensions | 30.5 × 11.7 × 14.2 cm (W × H × D) |
| Weight | 10lbs (Shipped) |
| Tuning Range | 88MHz-108MHz |
| Intermediate Frequency | 10.7MHz |
| Selectivity | -3dB at 120kHz |
| Sensitivity (IHFM) | 2.4µV |
| THD (500µV, 100% Modulation) | 1% |
| Channel Separation (1kHz) | 30dB |
| Output Voltage (Mono) | 0.8V |
| Output Voltage (Stereo) | 0.3V |
| Tube Complement | 6AQ8 (x2), 6BA6 (x3), 6AN8, 6C4, 6X4 |
| MSRP (1964) | $74.95 (Distributor Price (1964): $45.00) |
| Channels | 2 Channel |