-Laid-back sound signature with medium speed (while using the included foam tips)
-Treble is matched with the upper-mids, slight boost to lower-mids
-Mid-bass matched to lower-mids, slight sub-bass boost. Nice grunt without too much bass bloom.
-Articulation is surprisingly good when you take into account the steel construction and impressive collection of accessories.
I'd like to get out some impressions with some included silicone tips, but I can't seem to get a good fit.
It's a pretty impressive package overall, and it feels like a breath of fresh air. At the moment, I feel like I could use these as daily IEMs. Playing indie rock such as the Arctic Monkeys and the Black Keys through them sounds particularly good, as the A15's sound signature complements the genre well.
Full disclosure though, this is certainly no giant-killer. It just has a great value-factor. I'll be putting out a full-review soon.
Sneak peak: