In spite of ringing Phillips and being assured these are circumaural they are not. They push on the pinna and become uncomfortable after several tens of minutes.
Music sounds fine. Bit lacking in base. In spite of being specified to >20kHz they sub sampled at about 7.6kHz when used with a pure tone over Bluetooth from my MacBook. I have not been able to track down the cause but the Bluetooth link is supposed to be up to about 24kHz. I repeated the tests with an old wired headset that worked fine up to my hearing limit of about 13kHz.