I know the wood is Italian poplar so that might explain that bit..
I have a UL310 (1) and it's been my main cab for about three years.. So i know it very,very well and I have always been blown away by its practicality and awesome sound. I have just bought a used, but mint, UL410 S2 and I think there is a difference in sound. I know the S1 310 and 410 had a difference about them in terms of head room and low end but this S2 410 is not on the same level IMO. It is a slightly older one with the small holes in the grill exactly like my S1 310 so the weight is very good. The drivers look different (I gather the old ones are B+C - I don't know what that stands for), and I don't think they compare. I don't know if my cab shares the same drivers as the latest S2 series but they don't seem to have the same detail and presence as the S1 speakers in my 310 IMO. The low end is massive but it seems so scooped in the mids that even achieving that scooped Epi tone is hard and you end up with a very wide sounding rumble, lacking the definition I have come to expect. Maybe I need to tweak my amp, but on first impressions after only one gig, I think they are lacking the sound they have built their reputation on. I will stick with it, it is very loud and light, but I have come to expect more from these cabs. IME, IMO. Not bad, just not mind blowing like my 310 S1..
It says Brooklyn on the back, the only difference is it says 'Series 2' on the front and the drivers appear deeper and don't seem to have as much movement in use.
It seems shady how hard it is to find out where they are made. As such a good brand, I think they have a standard to sustain and am a bit worried my new purchase isn't all I have come to expect. I shall keep tweaking and let you know.