The P30 is the best preamplifier ever developed by Hegel. With its patented technology and hand-matched components, the P30 is a confident contender in the race towards being the best pre amplifier in the world. Regardless of price. Despite what many hi-fi enthusiasts believe, pre amplifiers are actually one of the most difficult audio components to develop. At the same time, it is one of the most important components in a well sounding system.