+1 to the list of folks experiencing a very sub optimal audio experience on the VivePro. Very tinny and no bass. Playing some titles were painful with extreme high pitch sound effects.
In terms of the physical design of the headphones and their mounting arms, they do not sit snug with my ears, which also effects the bass reproduction. The Pro Audio Strap on the 1st Gen had curved headphone mounts that seemed to give better headphone placement and pressure on one's ears. The VivePro's headphone mounts are straight arms which, at least for me, are much less effective at placing the headphones in the proper position with correct tension against my ears.