Heritage Audio HA-73EQX2 | Dual-Channel 1073-Style Mic Preamp and EQ
The HA-73EQX2 integrates the classic 1073-style microphone preamp and three-band EQ into a dual-channel unit, preserving the warm, full-bodied, musical character of British Class A circuitry. From vocals and acoustic guitar to drums and synthesizers, it accurately sculpts tone and depth for recording and playback, making it a reliable centerpiece for professional studios and mobile recording.
Key Product Features
- Dual-channel design: two complete 1073-style preamps and EQs for greater flexibility in recording and playback
- Fully discrete Class A amplification, preserving rich harmonics and dynamic performance
- British sonic character: uses Carnhill input/output transformers
- Up to approximately 80 dB of microphone gain, driving dynamic and ribbon mics with quiet authority
- Classic 3-band 1073 EQ: 12 kHz high shelf, selectable mid-frequency bands, and low shelf
- Four selectable high-pass filters (50 / 80 / 160 / 300 Hz) to quickly clean up low-end muddiness
- Front-panel JFET DI high-impedance input, preserving transients and texture of bass and synths
- Practical controls: +48V phantom, phase reverse, -20 dB PAD, Hi/Lo impedance switch, EQ bypass
- Stepped knobs and detented switches for easy recall and high left/right channel consistency
- 19-inch 2U rack design with built-in universal power supply, suitable for touring and fixed installations
Specifications
| Type | Dual-channel microphone preamp / three-band equalizer |
| Circuit topology | Fully discrete Class A, Carnhill input/output transformers |
| Channels | 2 |
| Microphone gain range | Up to approximately 80 dB, stepped gain selection |
| Input impedance (Mic) | Hi 1200 Ω / Lo 300 Ω (switchable) |
| DI input impedance | ≥ 1 MΩ, JFET high-impedance front end |
| Equalizer | 3-band: high shelving, mid peak, low shelving; stepped controls |
| High frequency | 12 kHz shelf, ±16 dB |
| Mid frequency | 360 Hz / 700 Hz / 1.6 kHz / 3.2 kHz, ±16 dB |
| Low frequency | 35 / 60 / 110 / 220 Hz shelf, ±16 dB |
| High-pass filter | 50 / 80 / 160 / 300 Hz (switchable) |
| Main controls | +48V phantom, phase reverse, -20 dB PAD, impedance switch, EQ In/Out |
| Connections | XLR microphone inputs x2, XLR balanced main outputs x2, TRS line inputs x2, front-panel 1/4" DI x2 |
| Rack size | 19-inch rack, 2U height |
| Power | Built-in universal power supply (100–240 V AC, 50/60 Hz), IEC inlet |
| Package contents | HA-73EQX2 unit, power cable |
