Nope, was talking about wireless headphones (full sized) I had almost all of them (QC35/ NC700/ XM3/4-for brief period, PXC550 I,II, B&O H9, DALI IO6), not including the PX (which was bought and returned the same day due to fitting issues), Momentum 2 wireless ( absolutely hate the sound signature, this line is a shame to Sennheiser) and Beats Solo something ( never bought those, somebody left a pair at our guest room)
Other than PXC 550 II, each and everyone disappointed me.
Had high hopes for the IO6, but they were too thin. H9 was typical B&O, beautiful to look at, absolutely garbage sound. However XM3/XM4 beats them all by distorting everything, even sweeping frequency sound waves!! Never seen a pair of headphones with this slow and sloppy bass response. Sony`s DSP correction starts with a 8:1 compression on everything!! And people seem to love this squished output...no wonder most mainstream album coming out these days have practically no dynamics.
Don`t trust me? Fine, download iZotope Rx, apply a 8:1 compression to the output and listen it through a proper Sony headphone (v6/7506) it will sound exactly like XM3/XM4. I have done it with reference grade mastering albums of Steely Dan/Genesis/ even Michael Jackson`s records with same result every ****ing time.
I have wasted thousands on BTNC cans and except for PXC 550 II, everything sucked, everything....other than casual listening in an airplane, all of them are useless for any audio related work. However the QC35 was not too bad, but NC700 is terrible.
I am really surprised that you are liking Momentum TWS over PXC550, the former (even their over ear wired version) does not even pick up anything around 15-17k in most recordings!!
Honestly I do not know. Buy a wired IEM.