Sound Pure's Take
The IGS Audio 573EQ is an inductor-based 3-band equalizer that packs the legendary British console tone of the Neve 1073 EQ section into a single-slot 500 Series module. Handcrafted by IGS Audio, it captures the musicality, transformer weight, and distinct harmonic character of vintage console equalization while delivering the high-grade components and precision matching required for modern production environments.
Built around custom Carnhill transformers and discrete inductor networks, the 573EQ shines at injecting non-linear analog vibe and broad, musical shaping into tracks. Its high-frequency band delivers an exceptionally sweet, open "air" boost that lifts dull sources without introducing harshness. Paired with a punchy low-end shelf, a versatile mid-range bell section, and a switchable high-pass filter, the 573EQ acts as a broad-brush sculpting tool during tracking or a harmonic "glue" processor when run in stereo across a mix bus.
The IGS Audio 573EQ is a top-tier choice for engineers seeking authentic 1073-style EQ character in a compact, modular format. Whether used to add silky top-end sheen to a lead vocal, authoritative low-end weight to a bass track, or broad analog mojo across a stereo bus, the 573EQ delivers classic British console authority with impressive precision.
From IGS Audio
500 Series in its full glory!
The low end is fat, smooth, fast, and combined with the highpass filter which makes it incredibly tight and clear. Our new device is described by 7 controls whilst the other classical devices have only 6 on the front panel. The mids are utterly precise and are great for both, corrective purposes and musical choices: fix problem resonance, declutter the mid-range, or simply open it up, it always sounds smooth and controlled. The High band is what you dream about when you think of sweet, airy HF EQ. It is switchable across a very well-considered range of frequencies and can really open up your audio, making it feel high-definition and extremely clear.
A pair of these sittings on a mix buss with no EQ adjustments add a great analog mojo to your mix!
Sound Pure Studios · Durham, NC
Come hear it in our control rooms.
Sound Pure is a working studio in Durham, NC — a 1,000 sq ft live room and two pro control rooms. Book a session to audition gear in a world-class acoustic space before you buy.