The FeQ-50 is a single-channel 4-band parametric EQ with both vacuum tube and solid-state outputs. The FeQ-50 is a 1/2-rack unit with a transformerless signal path. Each of its four bands features six selectable frequencies, with +/- 14dB gain boost/cut. The high and low bands can operate as peaking or shelving filters. A passive 80Hz high-pass filter has a 6dB/octave rolloff. Both XLR-balanced and 1/4″-unbalanced inputs are provided, as are +4 and -10 balanced outputs for both the solid-state and tube signal paths. All outputs are buffered, and can be used simultaneously.