AYA Tokyo Japan/R-comp is noted for its fat and warm sound, low noise, compact size, and true-bypass. A carbon composition resistor is used to make a high quality sound. High-quality parts are used (Vishay, Mallory, ERO). It uses the same kind of Harris parts used by Ross, DynaComp (Harris Linear/Intersil's CA3080E). Two or more kinds of transistors are used. Everything is carefully measured and selected. Internal wiring uses BELDEN cables, with points by General Electric. Four kinds of solder by KESTER to control tone quality(e.g., vintage Kester, special-order Kester, Kester R44).