Opamp Opa 275 G And Jrc45600

HI CAN ANY ONE HELP MY FREIND GEORGE
he has a arcam alpha six cd player, he has heard the mods i have done to the out put stage of my arcam dac, and my freinds meridain dac using better opamps. these are the two chips , is the op275-G a single or dual opamp?and the other chip is JRC 45600D can any one tell me if this is single or dual, thank you for your time, to look at this thread john.