Profile: Profusion plc is an electronics distributor for audio semiconductors and components. We provide transistors, rectifiers and analogue, digital & mixed signal ICs. Our transistors remain indispensable for applications requiring maximum power handling, device matching, or unique performance characteristics. Our analogue volume control uses a highly linear resistor chain design to deliver extremely low THD, accepts input signals up to +/-18V, changes gain only on zero-crossings and allows for hardware & software muting.