I already have the Sennheiser adapter for iPhone and the music system. Already I have been thrilled. Compared to the normal Bluetooth you can tell the difference total. Since I was at the Mac too cumbersome with the battery-powered Bluetooth adapter, I have brought this USB adapter for my iMac. My result: Unpack, plug and reposition only the output device, ready! The result is a sound experience 1a with remote control on the headset itself.
So I can only recommend !! ADP-X in conjunction with the headphones PXC 360 = very good combination