preamplificatore stereo pre box rs digitalThe new PRE BOX RS DIGITAL preamplifier converter combines all the features of the D A converter, DAC BOX RS, with a new class A solid state preamplifier section, switchable at the listener's pleasure on an integrated tube preamplifier section in the same chassis. It is also equipped with a dedicated headphone output with selectable output impedance to better adapt to different headphone models. The double DAC 24bit 192KHz used is the most expensive