NAT Audio introduced Signature Phono Vacuum RIAA- FULL BATTERY SUPPLY (that include tubes filament supply as well) - very last edition of previous model of phono stage with famous Russian military grade nuvistor tubes . Add to it an entirely new concept in RIAA inverse network-released by VACUUM field.
NAT Audio will take a part at High End show which will be held from 14.-17. May 2015 in Munich.
See about this at http://www.highendsociety.de/index.php/brands_2015.html