Tube Box S2 is our very first product to feature afully discreet circuit design without using anyoperational amplifiers (OpAmps). It also is the firstproduct to come with replaceable tubes for tube rolling andsound-shaping. This gives the customer many optionsto pick from and alter the sound signature to his preference.Tube Box S2 will give a full and relaxed laid backsound with lush mids, just like you would expect it from amuch bigger high end tube phono pre-amplifier. It offerssupport for both MM and MC cartridges and comes withmany gain settings to be switched on the front panel. Fivevariable input impedance settings are available to adjustto any MM cartridge, the 47k ohms input impedancesetting is fixed and suited for high output MCcartridges. The aluminium/metal casing is adapted toour DS2 line in looks and protects against vibrations andelectromagnetic interferences for superior sound. A truehigh end solution in a much smaller package! Suitable for MM and MC cartridges Precise RIAA equalisation in two parts, passive/active Fully discreet circuit design without OpAmps 2x ECC83 tubes (replaceable) Front-sided Subsonic filter button Front-sided Gain control Ultra low noise circuitry with FET input stage Dual mono circuitry for optimized channel separation Polystyrene capacitors used where possible Gold-plated RCA in and outputs External power adaptor and multiple internal power supplies Well-filtrated high-voltage anode power supply Sandwich alu/metal casing protects from vibrations and electromagnetic interference