Logged 30+ hours of burn-in now, and that low end is really blossoming. Needed some time to get my ears accustomed to the low end quantity (once again, FS Atrios user so very used to gigantic bass). Its really not as forward as the Atrios' low end, but its definitely there. As some folks have mentioned, it appears when called upon and makes it presence felt, but doesn't intrude. As an atrios user, this needs some getting used to. But I am happy to say that at this point I'd definitely not have any reservations using these onstage as a primary or backup IEM.
Shoutiness has diminished to just being strident. Ears get accustomed to it after a while, though I'm quite sure I'll still get a bit of a system shock when I use these at a 0700h soundcheck. Atrios have a bit more reserved sweetness to the mids and highs, which leads to less fatigue but I'm not sure if that's totally helpful in a stage monitoring situation. I was actually able to notice a mistake in Led Zep's "Good Times Bad Times" - Jimmy Page fumbles a guitar part in the left channel from 0:46 to 0:50. I must have heard this song countless times across different media (LP, cassette, CD, mp3) and different earphones, and I've never heard that mistake before. And I wasn't even paying attention. Remarkable. Now I cannot un-hear that mistake. d'oh!
Have been listening to a wide variety of music - alternative rock (Powderfinger, the Posies - yeah i'm going through the "P" bands in my iPod), folk (Nicholas Chim - local folkie and former bandmate, excellent stuff: http://nicholaschim.bandcamp.com), fusion jazz (Mike Stern, Alain Caron), hip hop (A Tribe Called Quest), some of my old live and demo recordings, and classic rock (Led Zep). Have yet to try out my classical tunes with these. So far, these IEMs manage all these genres with aplomb. These IEMs do acoustic guitars very well, a lot of presence and weight to notes. Bassy music (Alain Caron, Tribe Called Quest) is excellent. Not as much wallop as the Atrios, but the low end is definitely there, and I'm hearing extremely low end freqs that I don't remember hearing even with the Atrios. There is a lot of deliberate restraint in the low end, in that I'm hearing these fellas going really deep but not producing that deep low end in quantity unless called to do so. Plus, these IEMs play very well with EQ-ing - almost tempted to leave my EQ settings on permanently! Definitely going to crank the bass onstage via the Aviom system - but even with the Atrios I crank the bass onstage. Yes, I'm that much of a basshead. But I say this knowing that when I crank the bass, I'm going to get the kind of bass I enjoy and need for good feel and monitoring.
Looking forward to hitting the stage with these... though that's not going to happen for a few more months. :/
Quick update: just put the Tron soundtrack on - the Daft Punk one. I think that album pretty much demonstrates the deep and subtle low end that the ASG-1s are capable of. reinforces instrumentation and provides near-cinematic rumble when called upon. very nice.
Edited by kangcore - 3/14/12 at 9:08pm