Bolder Boulder – The 2018 phono preamplifier [$52'000] "features several substantial advancements in technology and performance over the previous generation 2000-level phono preamplifier through the use of better ground paths and planes, revised circuit topology and lowering of the static noise floor. Increased use of surface-mount PCB technology, manufactured on Boulder’s own SMD machines and ovens, has also yielded improvements in noise radiation, propagation delay, parasitic capacitance and the elimination of lead inductance in selected circuits. It also offers improvements in unit-to-unit quality and consistency with the added benefit of improved long-term reliability." For an itemized list of features, visit their website.