Avalon DI-preamplifiers have been in use around the world since 1985. They have found their way into the world's leading musicians rigs and recording sessions and have been featured on thousands of the best selling (and sounding) albums, downloads and live performances. The V55 includes the best of the Avalon U5 DI functions with two studio quality preamplifiers and "a new sonic addition". Two alternate solid-state topologies are cascaded to provide a rich, low midrange harmonic content not offered in other Avalon preamplifiers. This feature empowers the V55 with a new scale of sonic character.