Thanks for the clarification. Did they by any chance improve the mic? As on the original W3 i have its pretty bad. Catches the slightest strokes/touches on the body of the receiver, people cant hear me well even if i bring it close to the mouth. Did test it on a pc in a quiet room and sometimes it can sound good, but most of the time it doesnt. Noise cancellation seems too sensitive and probably activates due to just touching the receiver.Basically i gave up on it, and most of the time im using the phone earpiece.The original W3 and the new W3s both has their gain setting controlled by the app. On the original W3, the volume range on low gain is too wide and the steps too few, so it often becomes an issue that at one volume the headphone sounds too soft, but on the next level it becomes too loud. To mediate the issue, I'll have to lower / cap the max volume via app and thus making each steps smaller. On the W3s however, I didn't face any volume adjustment issue as the gain and volume step are much better spaced-out.
Since you have experience with the whole bunch of these devices, compared to W3 how would you rate the mics from Shanling UP2 and BTR3K? Are they any good, just useable or a disaster as on the W3?