Heritage Audio HA-73X2 | Dual-Channel Classic 1073-Style Microphone Preamp
The HA-73X2 is Heritage Audio’s dual-channel Class A microphone preamp built on the classic British 1073 architecture, featuring Carnhill transformers, a front-panel high-impedance DI, an 80 Hz high-pass filter, and a -20 dB PAD. Its thick, warm sound and stable power design deliver detailed, characterful performance for recording, vocals, instruments, and playback processing.
Key Product Features
- Dual-channel 1073-style Class A preamp, meeting microphone, line, and instrument direct-input needs
- British Carnhill input/output transformers, providing classic British warmth and rich midrange
- Up to approximately 80 dB of microphone gain, easily driving dynamic and ribbon microphones
- Front-panel high-impedance DI input, preserving the transients and detail of electric bass and synthesizers
- 80 Hz high-pass filter, -20 dB PAD, polarity reverse, and +48V phantom power — all included
- 1200 Ω / 300 Ω microphone impedance switching for flexible matching to different recording situations
- Output trim control, useful for drive saturation and downstream level management
- Low-noise, wide-dynamic-range circuit design for cleaner recordings and quieter backgrounds
- Rugged metal chassis with 19-inch 2U rack size for easy professional rack integration
- Suitable for vocals, acoustic/electric guitar, bass, drum overheads, keyboards, and external processing
Specifications
| Type | Dual-channel microphone / Line / DI preamp |
| Circuit architecture | Fully discrete Class A, transformer-coupled input/output (Carnhill) |
| Number of channels | 2 |
| Microphone gain | Up to approximately 80 dB (stepped settings) |
| Line handling | Rear-panel balanced line input, usable for external signal driving and tone shaping |
| DI input | Front-panel 1/4" high-impedance DI, approximately 2 MΩ |
| Microphone impedance | 1200 Ω / 300 Ω switchable |
| Filtering and controls | 80 Hz high-pass filter, -20 dB PAD, phase inversion, +48 V phantom power, output trim |
| Connectors | Rear-panel XLR mic/line inputs and balanced XLR outputs; front-panel 1/4" DI |
| Frequency response | 20 Hz–20 kHz (depending on settings and load) |
| Rack size | 19-inch 2U |
| Power | Built-in universal power supply (100–240 V AC, 50/60 Hz) |
| Applications | Vocals, acoustic/electric guitar, bass, drums, keyboards, external signal boosting and reprocessing |
