Hi all, I'm looking to upgrade my stereo listening pleasure and was very interested in a headphone amp (to use alongside some Grado's probably) but I'm confused about their connection. I read somewhere that the headphone amp is connected to a tape loop. If this is so do you not hear a combined effect from the main amp and that of the headphone amp in terms of gain, sound degradation etc? Should the HP amp be used stand alone as any other "normal" amp, with the source and output connected directly? If the latter is true, how do you get on with connections say from a CD player? Y splitter into amp and HP amp? Yours, confused of Suffolk!