SPL BiG StudioSPL BiG Studio is a 19 inch rack stereo image enhancement and harmonic enrichment processor with tube circuitry and high voltage analogue design that dramatically expands width, depth and tonal size. Stereo Enhancement Technology SPL BiG [Studio] increases the stereo image in a new analogue domain method that uses a unique difference signal network and specialised summing stage. It processes a dedicated difference signal through an analogue filter set