I got it Wednesday Compared to the previous PB10, it's definitely quicker, which confirms my first thought that the PB10 is somewhat flabby. The initial SPL measurements surprised me. The PB10 showed a massive peak in the 50ish region, but the Ultra doesn't. Likewise at about 30ish. The Ultra's decidedly flat, in comparison. Actually, truth be told, the Ultra sounded decidedly uninspiring I guess I must have done a half reasonable job with the PB10 A couple of total(ish) guesses with the BFD and it's immediately much better. I haven't had any time to do any proper tweaking yet, but have no doubt it will be the mutt's nuts when it's sorted. It's definitely more refined All of this is just in my room obviously.