Heritage Audio / i73 PRO ONE

＜＜Jul 2025 New Product！＞＞ The i73 PRO ONE is a USB-C audio interface with a built-in 73-style Class A preamp. With 2 inputs and 4 outputs, it delivers a full analog experience to anyone, anywhere.

■USB Audio Interface
■32-bit / 192 kHz
■2-in/4-out
■Mini-DIN IN/OUT MIDI
■ADAT IN/OUT

The i73 PRO One is an audio interface that allows musicians, producers, and audio engineers to easily experience the warm, musical analog sound that has been inspiring music production since the early 1970s. Featuring Heritage Audio's legendary '73-style preamps (Class A transformer-balanced), it allows direct recording to your computer without compromising their iconic sound character and musical texture.
Like other Heritage Audio '73-style preamps, the i73 PRO One features three inputs. This allows you to route any signal to your DAW with uncompromising studio quality, optimally tailored to your source—whether it's a vocal input to a microphone preamp with up to 70dB of gain, an electric guitar/bass to a responsive JFET DI, or a clean line input.

■Features
- 2 inputs/4 outputs
- One Class A 73-style preamp with up to 70dB gain (supports mic/line/Hi-Z JFET DI inputs)
- One additional line input
- Direct monitoring: Real-time latency processing
- One analog stereo monitor output (2 channels) with TRS connection: Individual mixes can be assigned via the software mixer
- One independent stereo headphone output: Dedicated cue mix can be set
- Supports recording, mixing, and playback at up to 32-bit/192kHz
- Preamp equipped with +48V phantom power, PAD, and phase reverse switches
- Monitor control section with MONO, MUTE, and DIM functions
- Mini-DIN MIDI IN/OUT terminals
- USB-C cable included
- AD/DA converter
Note: A MIDI breakout cable is not included with this product. Compatible with the YAMAHA ZP893500 (sold separately).

■System Requirements
・MacOS: Catalina 10.15.7 or later
*We do not support use in a Windows environment.

■Specifications
- Microphone Input Dynamic Range: 116dB (A-weighted)
- Microphone Preamp Gain: Maximum 70dB
- Microphone Input EIN (Equivalent Input Noise): -125dBu (Typical)
- Line/Instrument Input Dynamic Range: 116dB (A-weighted)
- Headphone Output Dynamic Range: Over 123dB (A-weighted)
- Maximum Output Level (Line/Monitor): +24dBu (Adjustable up to +12dBu with attenuation)
- Monitor Output Dynamic Range: 125dB (A-weighted)
- Built-in DSP: Delivers analog operation feel and near-zero latency real-time tracking processing
- Includes effect plug-ins modeled after Heritage Audio's own outboard gear and classic equipment from private collections (more to be added in the future)
- Simultaneous recording of processed wet and unprocessed dry signals to a DAW via the software mixer