Initial quick ab Px7 s2e vs pi8, vs m4
Not a fair comparison but it’s how I use TLDR: I prefer pi8, then px7s2e, then m4 in terms of sound quality. (All on stock eq)
Pi8 straight to px7s2e: immediately bombarded with more bass around the ears. Maybe 15% more. But separation is clean and great. Bass strong but Does not muddy up other frequencies as much. Now With in ears pi8 I can hear more airy sound due to my weird right ear(Sounds stage and positions is balanced left and right ) but with any over ear headphones, I hear more sound coming from the left. Therefore it’s noticeably panning left but it doesn’t bother me. And I know this doesn’t do its justice. Plenty of highs, vocal is close. Overall Sound signature is about same as pi8.
Px7 s2e to M4. M4 has noticeably (slight) more lower rumble, however it’s a little boomy which overshadows mids and high a little in comparison. Vocal is more distant. Highs is about same (remember it is a quick ab). Distinctively different sound signature.
Result: I’ll be trying to burn it in for 20hrs and see what changes. But I’m leaning towards px7 s2e + pi8 setup.
Edit: all using Bluetooth aac. Tried usb c mode it’s just miles better than aac. Tried aptx adaptive, heaps better too. Now just need to upgrade my iPhone to 17 this year to use the aptx adaptive dongle on the move.