Audient Black EQ, from Audient

The Black EQ features switched frequency, "Enhanced Slope" HF and LF shelving controls. A switched frequency (1.5kHz/3kHz) Presence/Absence band and a sweep frequency Lo Mid band. The Lo Mid and Presence/Absence bands can be switched between reciprocal and Constant Q modes to allow either wide band equalisation or wide band boost with narrow band cut (notching) characteristics.

The Overtone function adds an LF band specific harmonic colouration to the signal path, adding definition to the low frequencies whilst letting the high-end frequencies pass through uncoloured and pure. The Glo function adds a side chain compression path to the LF band to dynamically "tighten" or "thicken" the bass content. The 3 position Tilt switch provides a subtle change to the tonal balance by gently sloping the overall frequency response. The effect on the tonal balance is to "lighten" or "darken" an otherwise well equalised balance.

Discrete Class A circuitry 4 band EQ
Transformer balanced input
Enhanced Slope HF / LF shelving, Hi Mid
Presence/Absence, sweep Lo Mid
Overtone - LF band specific harmonic enhancement
Glo - LF band specific dynamic equalisation
Tilt - shifts overall tonal balance around 1kHz