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The Warm Audio WA73-EQ is a single-channel, Class-A microphone preamplifier with an integrated 3-band equalizer, designed as a homage to the classic British “73-style” lineage (à la Neve 1073). It offers up to 80 dB of gain, transformer-balanced signal paths, and careful component choices to evoke that warm, musical analog coloration while adding flexibility via its onboard EQ section.
Warm Audio positions it as a “modern, more affordable but sonically serious” take on the legendary British consoles — giving engineers and studios a tool that blends character and utility.
Here are the standout features and technical specs:
| Feature | Details |
|---|---|
| Gain / Topology | Up to 80 dB of gain (stepped resistor gain knob) |
| Circuit Style | Discrete Class-A design, fully discrete signal path, transformer-balanced |
| Transformers | Custom-made Carnhill transformers (UK) for input and output |
| EQ Section | 3-band inductor-based equalizer (low, mid, high) |
| LF (Low Frequency) | Boost/cut at selectable points: 35, 60, 110, 220 Hz |
| Mid Frequency | Boost/cut at: 360, 700, 1.6k, 3.2k, 4.8k, 7.2k Hz |
| HF (High Frequency) | Shelving options at 10, 12, 16 kHz |
| High-Pass Filter | 4-position HPF: Off, 50, 80, 160, or 300 Hz |
| Additional Controls | • Tone switch: changes input transformer impedance (e.g. to add “air” or match different mic types) • Polarity (phase) invert switch • Phantom power (48V) • Ground lift • Insert send/return (TS jacks) for external processing |
| Inputs / Outputs | • Mic input (XLR) • Line input (TRS) • Instrument (front TS) • Insert send/return (TS) • Line outputs (XLR, TRS) |
| Metering / Output Control | Output level knob; 5-segment LED meter for level monitoring |
| Rack / Form Factor | 1U, 19" rack-mountable unit |
| Power / Build | IEC input, switchable 115/230V, rugged steel chassis, hand-wired and hand-assembled |
| Frequency Response / Noise | ~20 Hz to 20 kHz with tight tolerances; very low noise floor (specs in manual) |
