Ok, thanks Syntax. Why is that?
The Preamplifier is THE neuralgic section in the electric circuit. It receives the Signals from different sources, amplifies them to an output signal, builds an audio signal (RIAA) and amplifies it with factor 600-2000 (Phono). It is a complex unit, based on solder points, contact transfers, layout in general, brain, quality of parts...nowhere in the whole process is the possibility to loose details so huge. A power amp for example simply amplifies a given signal. The Preamp is the Achilles Heel, you buy brain (there are differences of course) and with your choice you will manifest the direction/quality of your System.