Are there any plans for a powered and remote controlled preamplifier?


Yes there are. We are currently working on a powered/controlled preamplifier to complement the SA400 power amplifier - see the In development page.

The Passive Preamplifier was produced to represent the absolute lowest distortion and noise that could be obtained. Clearly, if there are no electronics in the unit then there is nothing to distort the signal, no hum loops can be introduced, and noise will be at a minimum provided components have been selected for lowest resistance and highest quality, which of course they have.