@georgehifi The La Voce does not have a volume control. I'm running it through a Simaudio 600i.
@kren0006 I can't say with certainty how the La Voce compares to the NT-505 as I have not had them in the same system. I have the NT-505 in my main and bedroom systems, using their streamers. The La Voce is in my computer system, streaming from my PC via USB. Different connections, different amps, preamps, speakers...
Having said that, The NT-505 is still in my main system and I'm still very happy with it. I'd say they are more alike than different, with the NT-505 being just a tiny bit more on the "warm" side, and the La Voce having a little more detail and more "natural" sounding. I think it handles the high frequencies just a little better than the NT-505 and is also a little more "dynamic". Again, take all that with a grain of salt as I haven't compared them directly using all the same gear.