Well, 2.2 does share similarity in that the tonality is closer to Ref.1 and note weight with a strong resemblance of 1Plus2's overall signature. Areas like the mids are thicker on 2.2, more fleshed out which contributes to a larger perception of detail and resolution. The lean semi thinness 1Plus2 could exhibit at higher volumes has been reduced on 2.2. Bass still akin to the original 1Plus2 as I believe 2.2 is using similar drivers, the low-end does appear a little faster and notes clearly understood from the mid-range compared. Treble is still in 1Plus2 zones just a little smoother and refined, soundstage at similar levels. One of the big areas I mentioned is the flow of the music, I have heard 1Plus2 being labeled as mechanical or robotic in the past. While I can relate to that its always a sound I've enjoyed and what expresses its technical skill.. 2.2 seems to detach itself from that progression in the music and add a little more toe-tapping yet remain as skilled in separation and layering. Its obvious with acoustic tracks or single piano solos where you hear the micro detail of each note passing onto the next rather seamlessly, quite involving and intriguing to feel in the music. If the 2.2 was too much like the original I wouldn't of bothered buying it because what's the point, at first I didn't think Tralucent could create a true upgrade. I was wrong, the two can stand side by side with some advantage to the newer 2.2. Kind of clever how they remain similar yet altered. Plus5 is a very different creature and not something I've heard from Tralucent before, completely detaches itself from the pack and I need more time to deal with it, because its tonality is much warmer around the mids, its note weight very thick, it still manages an immense amount of detail however and remain extremely spacious. Basically, 2.2 and I clicked straight away like all previous earphones Gavin made, Plus5 is completely opposite to my preferences and I'm pondering what to conclude. You're welcome.