The Nady GEQ 131 is a single-channel 31-band, 1/3-octave equalizer in a single rack space. It features constant Q-circuitry with a 5% center frequency accuracy, switchable low-cut filter with LED, selectable 6dB or 12dB range with LED, active balanced and unbalanced input/output connectors (XLR, 1/4" TRS, and RCA), variable level control, passive bypass switch, signal, overload threshold LEDs, and a ground lift switch.

31-1?3 octave bands with 1?3 ISO spacing from 20Hz to 20kHz

Active balanced (XLR and 1?4") and unbalanced RCA inputs/outputs

Variable input level control

Low-cut filter at 20Hz

Variable low-cut, low-pass filters

Balanced XLR and ¼? TRS input/output connectors

Constant-Q bandwidth from each filter with 3% center frequency accuracy

Low-cut filter at 40Hz, 12dB/octave switchable, with status LED

Parallel filter design for minimal phase distortion

Ultra low-noise circuitry