Golden Age Project PRE-73 MKIV Mic/Line/Instrument Preamplifier

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Description
The Golden Age Project PRE-73 MKIV is a one-channel vintage-style microphone, line, and instrument preamplifier built around a discrete, transformer-balanced path inspired by classic 1073 console modules. Up to 80 dB of mic gain, an output level control, and a -14 dB output pad let you run clean or push the gain stages for color without slamming the next device in the chain.
Tone Shaping and Connectivity
Switchable 1200/300 ohm mic impedance, a two-position high-pass filter, and Air EQ (3 or 6 dB at 30 kHz) shape the top and bottom at the source. A front-panel Hi-Z input covers guitar and bass, an insert jack accepts outboard EQ or compression, and separate XLR and TRS outputs keep routing flexible. No ICs or surface-mount parts sit in the signal path; an external 24V supply keeps the PSU away from the transformers.
Specifications
- Type: Solid-state, discrete Class-A mic/line/instrument preamplifier
- Channels: 1
- Max mic gain: 80 dB (gain switch 20 to 80 dB; Line mode reduces gain by about 30 dB)
- Mic input impedance: 1200 or 300 ohms, switchable (Line mode about 10 kOhm)
- Phantom power: +48 V, switchable
- Polarity: Switchable
- High-pass filter: 6 dB/octave at about 40 Hz (HP1) or 170 Hz (HP2)
- Air EQ: +3 or +6 dB at 30 kHz
- Output pad: -14 dB
- Output termination: Selectable 600 ohm
- Metering: 4-step LED output level meter
- Analog I/O: Combo XLR/TRS mic/line input; 1/4" Hi-Z instrument input; XLR and 1/4" TRS line outputs; 1/4" insert
- Format: 1U half-rack metal chassis
- Power: External 24V AC supply (included)
- Dimensions: 254 x 216 x 41.9 mm (10" x 8.5" x 1.65")
- Weight: 2.1 kg (4.6 lb)
In the Box
- PRE-73 MKIV preamplifier
- External 24V AC power supply














