Question about Sennheiser Pxc 550

Addendum: I have Hi-Res Music on the player, and tracks encoded with 24bit / 96kHz are transferred to the Sennheiser PXC 550. Tracks with 24bit and 192kHz are no longer transferred. However, I cannot say whether the player uses any downsampling during Bluetooth transmission. However, the quality is beyond reproach. I've never had wireless headphones that sounded as good as the PXC 550 ... I can imagine that for bumbum freaks with impaired hearing, the maximum volume might not be sufficient.

Unfortunately, I can't help you because I don't understand the question at all. Please call Sennheiser directly