With the Stern preamp and the Heisenberg mono blocks, Audionet chimes in a new chapter of amplifier building. In more than one respect this trio is blasting conventions; sound quality and price fall definitely within. The attractive – also because it won’t reveal itself at first glance – styling by Hartmut Esslinger and the extent of innovative hightech from Audionet’s R&D department form in this triumvirate a passionate symbiosis which brought me a true joy of heart. The fact that these components bear the names of Noble Prize winners won’t cause any harm, for Otto Stern and Werner Heisenberg would certainly be proud to stand bail as namesakes for the new i-fidelity.net references.   Philip Cornelius