‘SoundEngine’ meanwhile is a form of local error cancelling in place of global feedback, which in sound quality terms makes an amplifier with Class AB efficiency and something close to Class A performance. It’s worth looking at Hegel’s own documentation to get more loquacious descriptions than we can muster here, but in essence, ‘DualAmp’ technology separates the voltage and current gain stages into two distinct amplifier modules, while ‘DualPower’ relates to provision of discreet power supply feeds to the input/voltage gain stage of the preamplifier section, and the current output stage of the power amplifier stage, with separate taps from the transformer feeding independent power supply sections. Hegel is big on nomenclature, and the H90 bristles with several of the company’s key technologies, encapsulated in pithy names like ‘DualAmp’ and ‘DualPower’, alongside the aforementioned ‘SoundEngine’. The H80 was one of the first of the company’s ‘refreshed’ line, featuring improved versions of the company’s long-standing ‘SoundEngine’ circuit design, but subsequent developments have radically improved the performance of Hegel’s amplifiers still further. Hegel has changed a lot in the intervening years between the H80 and H90. And, although they ostensibly look the same, share a similar chassis, and occupy the same space in the catalogue, they couldn’t be more different. The H90 replaces the H80, and improves on its predecessor in almost every way, but without incurring a price penalty. The starter amp from the Norwegian electronics expert has fought above its weight category for the last four years, often being the cheapest link in an otherwise very expensive chain. I’ve made no secret of the enjoyment I’ve extracted from the Hegel H80 integrated amplifier.
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