Heritage Audio HA-73

Heritage Audio HA-73 | Single-channel Class A microphone preamp with classic 1073 tone

The HA-73 follows the classic 1073 architecture, featuring a fully discrete Class A design and transformer-balanced I/O that delivers a warm, mid-rich British sonic character. It provides up to approximately 80 dB of microphone gain and includes switchable 48V phantom power, a -20 dB pad, phase reverse, LoZ switching, and a front-panel high-impedance DI — offering musical coloration and push from vocals to guitar and percussion.

Key Features

• Fully discrete Class A circuitry that faithfully reproduces the 1073-style thick mids and smooth highs
• Transformer-balanced inputs/outputs, delivering classic iron saturation and wide dynamics
• Stepped microphone gain control (up to approx. 80 dB) for precise matching to a variety of microphones
• Switchable LoZ (low impedance) mode to shape pickup character and optimize impedance matching
• Front-panel high-impedance DI input for electric guitar, bass, and synthesizers
• -20 dB pad, phase reverse, and 48V phantom power — instant control at the press of a button
• Output trim for drive and tonal control, easy to pair with recording interfaces
• High headroom, low noise, and wide frequency response suitable for a variety of recording scenarios
• Robust chassis and reliable components for stable long-term operation and touring

Specifications