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The Golden Age Project PRE-73 MKIII is a one-channel vintage-style microphone, line, and instrument preamplifier. The signal path uses only discrete components such as resistors, capacitors, and transistors. The input and output stages of the pre are transformer balanced with each transformer optimized for its purpose.
The circuit in the unit is similar to the classic 1073 module with a corresponding sound character that is warm, punch, sweet, and musical. These characteristics have been heard on countless recordings through the years and are appropriate for a wide variety of sound sources and music genres.
Vintage Style electronics. No integrated circuits in the signal path
Maximum gain in MIC mode is 80 dB, enough to handle passive ribbon mics with quiet sound sources
GAIN switch range 20 to 80 dB. GAIN/LINE mode switch, gain is reduced by 30 dB in LINE mode
Selectable two-position high-frequency AIR boost EQ, 3 or 6 dB at 30 kHz
Selectable 6 dB/octave two-frequency high-pass filter at around 40 (HP1) and 170 Hz (HP2)
Tantalum capacitors in the signal path
Switchable impedance in MIC mode, 1200 or 300 ohms, will change the tone of most mics. The input impedance in LINE mode is 10 kOhms
Switchable phantom power and absolute phase
A high-impedance instrument input for any sound module, electric guitar or bass
A simple but effective 4-step LED output level meter
The output level control makes it possible to make fine gain adjustments and also to overload the main gain stage(s) for more character and then lower the signal to a suitable level before the output stage
Combo XLR/TRS input jack and separate output XLR and TRS jacks for flexible connections
Insert jack for inserting EQs and other units
Selectable 600 ohm output termination
External power supply to avoid interaction with the audio circuits and transformers