X-Rack Mic Amp Module The Solid State Logic Mic Amp module for the X-Rack is designed to handle the varied input needs of the project studio. Made using the same SuperAnalogue circuitry as the XL 9000 K console, the X-Rack Mic Amp module sports a killer Mic Pre with 75db of gain, variable impedance control, phantom power and phase reverse, line input with level control, front panel instrument input and High and Low pass filters – all in one tiny box.