Yosemite Preamplifier

Our first tube preamplifier build began as many ampsandsound products do, inspired by icons. In this case, legendary line-phono units like the C22 and Marantz Model 7 guided the basic approach to the circuit. Many of these units provide controls largely abandoned by the modern audiophile - tone controls for example. These add not only additional parts, but require additional feedback to compensate for their effects, a design compromise that runs counter to our ethos.  In the style of rebuilds of tape heads as linestages, we removed these tone controls and separate out the power supplies for phono and line - there are completely separate power transformers and supplies for these two stages, something almost never seen in a unit of this type. Next we applied our attention to detail in build quality, a 200% overspecified toroidal transformer, premium 33-step attenuator volume control, high quality coupling caps, custom nickel-core step up transformers for the moving-coil input, a new cust