SSL X Logic Alpha Channel, Professional Ultra Cleaner Mono Mic Preamp, With line input, Hi Z input and integrated AD converter, Instrument input, Variable harmonic drive circuit has different distortion characters, High-pass filter with adjustable 40 Hz, 80 Hz or 120 Hz cutoff frequency, Automatic sample rate detection, 3-Band SSL parametric EQ with adjustable Q-factor and dual LF curves, Intelligent audio limiting to increase the headroom and avoid digital clipping, Design: 19"" / 1U