Prelude 3.1-LE is a tube based fully balanced headphone amplifier and pre-amp. Designed with Supermalloy Transformer so that it realized wide frequency characteristics and also play the transparent sound by class -A triode operation in non-feedback design.In particular, the dual mono function of the power supply and balance amplifier function provides transparent sound.

Svetlana 2-SE is a Hi-End tube headphone amplifier. SE version features the 6AS7G output tube is adopted to further enhance the output to drive not only conventional headphones but also planar magnetic headphones. High efficiency output transformers have been selected to provide optimised wide band frequency characteristics. It is designed to play pure original sound with class-A triode with non feedback .

Svetlana 3-SE is a Hi-End tube headphone amplifier. Svetlana 3-SE is a well-designed pure tube amplifier complete with tube and transformer coupled. High efficiency output transformers have been selected to provide optimised wide band frequency characteristics. It is designed to play pure original sound with class-A triode with non feedback .