1TrickPony
Headphoneus Supremus
Well, to start with - according to the Audio Check high frequency sweeps [ http://www.audiocheck.net/soundtests_headphones.php ], my hearing only goes out to ~14 - 15-KHz these days, so if the PT15 has peaks above that, I'm probably not going to hear it.
On my PT15, I'm using a donut foam under a full foam (both standard thickness), mainly for fit, but I suppose some of the Treble is being attenuated as well.
I bought the Qian39 & Qian25 to experiment with re-cabling (bought some wire and 2.5mm TRRS plugs, along with the latest group of earbuds).
I've noticed the Zen 2 in VE's AliExpress store - and I'm curious about how it sounds, compared to some of other earbuds in the $100 - $200 range (like the TY Hi-Z 650, Shozy BK / Stardust (2.5TRRS), PureSounds PS100-600, & Seahf 650). If the Zen 2 has the Midrange clarity of the Asura 2.0, and additional Bass impact, it would definitely interest me. The only issue, is that earbuds the size of the Monk Plus & Asura aren't really comfortable and secure on my ears, unless I wear them over-the-ear, with silicone ear hooks on the wire.
the Zen is worth it...provided you have a source with decent ooomph. I specifically love the zen2.0 for its overall balanced and immersive soundstage.
if you liked the Lz-A4, the Zen would be the next best thing (for slightly less). I feel though that the A4 has a sweet spot in the upper mids/lower treble the Zen 2.0 can't touch.