Hello folks, just to make it clear, this is only a preliminary opinion from my PM4's out of the box!
Received them yesterday and as usual the presentation is excellent, my only criticism is that the lid needs a small magnet. After getting them out of the box, "feel a bit heavy and cumbersome" and as usual, fiddly to get the cables attached but this is all a comment not a negative, first opinions! The box is so fully laden with accessories, three cables, lots of ear buds and numerous filters, a very time consuming and enjoyable pastime will be had experimenting. Though they seem heavy and cumbersome, they fit nicely into the ear, you just need to orientate them to be comfortable and get the cable sorted, I tried them just as they came, gunmetal filters and added the foam buds, sound, meh! Ok but not stunning! Bass sounds a bit flabby and there is nothing that makes you think, oh wow! So I left them running for a few hours, came back and changed to the gold undamped filters with a rubber bud, what a difference, on one of the Camel tracks, I have played this so often, I thought I knew it so well, what I thought was a stick hitting the edge of the drum turns out to be someone snapping their fingers... These headphones don't grab you by the ears and shout "LOOK AT ME I MAKE THINGS SOUNDS FABULOUS" they just get on with quietly playing the music with clarity and detail, every instrument and person seems to have their own space and are treated individually, voices seem to have had elocution lesson and seem to pronounce words with clarity and the sound stage isn't particularly tall or deep but it seems to wrap around your head and down the back of your neck! This will be my last listen for a week or two now as my ear wax problem has returned on using these, so it's back to the HF200's for a while until this settles down. A note on the bass, these headphones seem able to go really low, they can tickle the insides of my ears but to me there is a section missing, not sure how or why but the Vyrus seems to be the same to me, maybe I am just used to IEM's that bloat the bass but all-in-all so far I am a very happy bunny! Well done Bob and team, keep it coming pal.
Good grief, what are the PM6's going to sound like, if the PM4's sound this good, I will need new ears!
FYI; Shanling M2 with OPPO HA2 amplifier being used.