The GoudieFX Compressor is faithful recreation of the popular Ross compressor, all components used are low noise/audio quality to ensure the best possible sound from the compressor. There are improvements to original design, mostly around the power supply filtering for increased AC ripple rejection and improved biasing. Q3/Q4 transistors are matched to 1% or better to ensure a symmetrical/balanced guitar signal from the output stage in the compressor and eliminate unwanted distortion.