Received the Concerto 4's Friday evening and have only had time for a few hours of listening but I will give my initial impressions.
The speakers are very well balanced, the sound is very detailed and smooth, with very tight bass and a mid-range which is just fantastic. They have a huge sweet spot, I can move all around in my listening position and I don't hear much change.
So far I am "very pleased" and I will update after a week or so but I would definitely recommend these. They sound excellent with my TORII JR and ZP3, ZROCK set-up.
If anyone has an interest there is a used pair on CL.
https://phoenix.craigslist.org/wvl/ele/6038273446.htmlI spoke to this Gentleman and I was going to buy these but I managed to get a new pair for a great price with a little scratch, which is not even visible unless you know it is there and look very hard for it, even then it is nothing.
More to follow...