MM-400
| Brand | Monarch |
| Manufacturer | Monarch Electronics International, Inc. |
| Function | Amplifier, Microphone |
| Produced | 1964 |
| Country | United States |
| Signal Path | Analog Hardware |
| Weight | 4lbs (Shipped) |
| Frequency Response | 50Hz-2kHz, 50Hz-15kHz -5dB |
| Gain | 6dB |
| Maximum Input Voltage | 1.5V |
| Output Voltage (Minimum Distortion) | 2V |
| Maximum Output Voltage | 2.5V |
| Impedance | 50kΩ |
| Finish | Black and Brushed Gold |
| Channels | 4 Channel |