Years late on seeing the inquires below :), but I own a pair of Duetta Signature Series IIs (Music Technology in VA restoring and upgrading fully very soon with all Graz latest gen ribbons and wiring/clamp kit) and I’ve only run them with BAT (Balanced Audio Technology) solid state amps mated with their tub preamps. I currently have a VK-600 w/ bat pack and VK-5i preamp. Match made in heaven with these speakers and an MHDT Orchid tube DAC. The Symo speaker cables are also a must (developed to Jason Blume’s specs). I’ve posted it all here in virtual systems (“Matt Parker’s System”). Sounds absolutely incredible!
