hi..i had 2sound cards one of them is m-audio 192 and the other is emu1212m . m-audio has njm4556 and can drive headphones i am agree with andrew..but emu has njm2068 and can not drive low empedance headphones..i decide to replace njm4556 but this opamp is old and is not quality enough for me..do you prefer a modern and high current opamp for emu1212m output..thanks