exactly, we agree. and there's nothing "neutral" about playing an instrument - for instance, I used to have three basses, one tuned and strung for classical music and folk, one tuned and strung for jazz (softer strings, longer decay, softer attack, less need for the higher register than in other genres, etc), and the electric one which sounds like neither. I still have two cellos in the house, because they sound differently. - of course, if you're listening to an organ (or synthesizer, or drums, or movie sound tracks) then maybe the UE reference monitor is not your best choice - I might reach for the 11pro on some tunes, or for beyers on some, or just go for a speaker rig, ideally... but before we give people who haven't heard a UERM for themselves the idea that it's bass-shy, let's beware: I maintain that on too many recordings there is too much equalization going on already (and in some entire genres, for instance I love reggae but pu-leeze - that's not bass, that's oomph shaking the house, and nobody is going to expect "accuracy" or "neutrality" or "faithful rendering" of timbre or attack and decay).
Nice set of instruments you have there! And yea, I wouldn't categorize the UERM as bass lite or weak with acoustic music. In my previous post I didn't explain correctly what I meant by "movement of the driver(s)." I meant attack and decay. The UERM is very good at this, but until you hear something more capable (at least to my ears), it exposes the weakness. However, this is just me going off to the extreme as I more than likely wouldn't notice it unless I was A/Bing with the other custom IEMs. I can grab a $500 custom IEM and think "wow, this sounds amazing" or think "wow, this really isn't very good" all depending on what, if anything I listened to just before.
And electronic music can have some great texture and detail in the music including the bass. Sure, it isn't a natural instrument, but it is present none-the-less. The JH16 for example will accentuate those details due to the attack/decay, which aren't quite as natural with say a lower tone on a Piano. For me, with electronic music it is more about hearing the details and understanding the sound, which takes shape better with better resolution and driver capability. And today's pop music is the house shaking undefined stuff, but mostly undefined because of the poor mastering IMO. The bottom line is the UERM is an exceptional custom IEM, but it isn't going to please all the people for all the genres.