The filigree technology of the 077 preamplifier merges with the excellently crafted aluminum housing in the Berlin manufactory. The hand-assembled circuit boards, the powerful X-AMP 2 amplifier stages, the XLR connections and the other selected components are put together with the greatest care. Even the optional modules that are available for individual assembly are carefully handcrafted and are subject to the same strict testing process as the preamplifier itself.process as the Reference Line devices.