I just got the P1s in yesterday as a sidegrade to my daily drivers (RHA T20, Sony XBA-A3), and these in no way are bass-light. Certainly not like what some posters earlier on in this thread have been reporting. If anything the P1s are very slightly V-shaped, and you definitely do notice the bass. Those saying otherwise must have had a bad seal during their testing. Still not basshead IEMs by any measure, of course. These sound just fine plugged into my iPhone 6S at about 3/4 volume.
Very happy with my purchase as the P1s make a very good counterpoint to my other 2 IEMs. Nicely reproduced highs as opposed to the bassier T20s and fantastic vocals. Soundstaging isn't great, though, but I've been spoiled by the A3 (You'd have to spend a pretty penny to beat the A3/Z5's soundstaging). As a nice bonus, the P1s are also much, much, MUCH less fussy for portable use. The T20s are stupidly overengineered and the A3s stick right out of your ear canal, which can look...awkward. The housings pretty much disappear into your ears, wire is nice and pliable and no silly over-ear clips!
