The Luxman LV-105 is a hybrid amplifier and therefore called "brid" by luxman. Because it have audio transistor stages and vacuum-tube stages it have 2 power supplies. It uses vacuum tubes in combination with transistors, FET's and MOSFET's. 1984-1987 price $700 Power 80w/8ohm - 100w/4ohm frequency range 20 to 20.000 Hz Total harmonic distortion 0.3% mmore mc catridge its vacuum tubes follow the field-effect-transistor (FET) low-level stage and drive the power-MOSFET output stages. The 6CG7 twin-triode tubes used in the LV-105 are more linear than conventional transistor driver stages, and they have greater bandwidth and lower phase shift