The IGS Audio 573EQ is a progression on the famous classic British style inductor EQ, in a compact 500-series format.

The low end is fat, smooth, fast, and combined with the highpass filter which makes it incredibly tight and clear. The 573EQ features 7 controls whilst the other classic 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.