The Loop phono pre-amplifier is based around pair of NOS ECF80 tubes, employed in the RIAA equalization and MM gain stage, utilizing unique passive RIAA curve equalization, thus providing very neutral sound along with the natural tonal colors of the voices and instruments. The Loop is essentially hand made product, utilizing only components which are carefully selected and matched. MC step up gain section is done with J-fets in SMD technology, providing a high MC gain suitable for wide range of MC cartridges, along with MC input impedance (MC load) set-up feature for three most common loads, 50ohm, 100ohm and 200ohm, select-able by micro-switches at the back panel of the unit. NOS ECF80 tubes and all the parts and elements are rigorously hand selected and matched, after extensive measuring and listening tests, in order to provide a great performance. ECF80 tube sets should last for more than 5000 hours, and matched pairs of NOS ECF80 tube sets are available as spare parts.