Golden Age Project Pre-573 MKIII - 1 CHANNEL MIC / LINE / INSTRUMENT PREAMPLIFIER

(This text is machine translated) The Pre-573 MKIII is a module for the api 500 format that has the sound and features that made the PRE-73 so successful. The circuit still uses the preamp and output section of the classic 1073 module, adapted to work in the api rack format. It has a total gain range of -10 to + 80dB. The 20-70dB range is handled by a knob and there is a separate toggle switch to select an additional 5 or 10dB gain. The input can be configured to accept line signals from another switch, the gain is then lowered by approximately 30dB and the input impedance increased to approximately 10 kOhm. The input impedance of the microphone input mode can be switched between 1200 and 300 Ohms. Phantom power and phase inversion are also selectable from the front panel switches. An additional feature, which uses the same circuitry as the PRE-73 DLX, is the active DI input with a high input impedance of approximately 1.5 MOhm. The output signal from the active DI circuit passes through the input transfor...