Focusrite TwinTrak&nbsp;Pro&nbsp;Dual Mono/Stereo&nbsp;Tracking Solution and True Stereo Compressor Two award-winning Class A discrete transistor-based Focusrite pre-amps TwinTrak Pro pre-amps feature a wire-wound, inductor-induced Air function, and controllable mic input impedance - recreates the open and airy qualities of more expensive transformer-based pre-amps. Dual mono/stereo optical compressor featuring custom fast-acting optos, comprehensive controls and true stereo linking Pro Series' Latency-free monitoring - monitor your source signals within the mix, directly at source 24 bit DAC as standard and Optional ADC Two award-winning Class A discrete transistor-based Focusrite pre-amps TwinTrak Pro pre-amps feature a wire-wound, inductor-induced 'Air' function, and controllable mic input impedance Dual mono/stereo optical compressor featuring custom fast-acting optos, comprehensive controls and true stereo linking Pro Series' Latency-free monitoring - monitor your source signals within the mix, directly at source 24 bit DAC as standard and Optional ADC