I now have two of the (according to others) top tier basshead Balanced Armature-only IEMs in front of me.
The Noble 5 and Westone W50.
I gave my first impressions for the Noble 5 in an earlier post: http://www.head-fi.org/t/761433/the-best-iems-for-bass-are-the-iem-bass-club/795#post_11673582
The W50 are completely different. I was expecting them to be very similar given that they have roughly the same configuration (1 dedicated BA to bass, 2 to mids, 2 to highs) and seem to be fairly direct competitors in the market.
The W50s have great packaging, tons of awesome tips, an excellent box, two cables (one with mic), and are extremely comfortable to wear.
I'm trying to acclimate right now to the dark tonal signature of the W50. I was anticipating a very balanced signature with a slight bass emphasis, but they are quite dark.
Hitting them with EQ in the sub-bass only, these do get fairly deep, but lack impact. Further applying EQ (initially with a graphical EQ instead of parametric just for ease), I end up with something like:
That gives me clarity and bass. The Noble 5 is completely flat at 125+ to achieve nice clarity (I'm effectively just pumping up the sub-bass). I'll tinker with the parametric EQ to get something along those lines later.
The bass potential on the W50 seems to be similar to--but slightly short of--the Noble 5. The default sound signature of the W50 is dark, while the Noble 5 is quite clear initially.
The comfort of the W50 is superior to the Noble 5. It's easier to get a seal for me as well as easier to get a comfortable fit.
I'll have reviews of both in the next couple weeks.