Hello As a newbie I'd be very grateful for some advice on what I suspect is a very basic question. I have a Marantz CD6003 + PM 6003 amplifier, Monitor BX1 speakers and HD650s. Almost all of my listening is done through the 650s, plugged into the headphone out on the PM6003. (I realise the CD6003 has a headphone amp built in but the remote does not work the volume control on the CD player, only on the amplifier, which is frustrating). Reading these forums, it appears that I might need more power, i.e. a dedicated headphone amp, to get the best out of the 650s. Is that correct? Daft question but what do I connect the headphone amp to - just to the CD player and completely ignore the PM6003? Any advice greatly appreciated.