With its interactive menu, the PX1 preamplifier offers several types of uses. The first is the "Class A" mode, this mode relies on a circuit based on bipolar transistors only, in "double cascade" type mounting, offering a performance in terms of distortion gradient close to a very homogeneous tube mounting and polarized in "Class A". The second mode is the more discrete "discrete mode", the "discrete" output is a stage based on a more conventional typology based on a differential input stage JFET and bipolar current mirror with a polarized output in class AB, more prone to a distortion in odd harmonics sometimes less appreciated "by the ear", but sometimes also felt as more defined.

The outputs have not been set aside since the PX1 has a balanced XLR output, an unbalanced Cinch, a recording, a high-pass output and two outputs for sub-bass.