How do you think about parallel connection of op-amps

In this configuration absolute useless in my opinion

Thanks for commjng. Do you mean no different from using only one op-amp? If it does, I have to search another powerful op-amp that is able to supply to both L and R channels, or have to concern to assist by transistors.... Because the source GND comes from dividing single power supply using resistors. It is so fragile.

Your dividing with zero. Everything has resistance.

Thank you, all commented and advised me. I think about this headphone amplifire over again. Basically I'm planning to build a power amplifire to drive speakers. And if I add a headphone amplifire to it, basically I want to use balanced lines. Unbalanced 3 pole plug is for my little convenient I wondered. Now I concern I had better to place only balanced outputs on this amplifire set, and build an interface circuit for 3 pole plug as other set, if I need it. Balanced processing and unbalanced processing require each different power supply, I think.... This is my first plan ( http://everycircuit.com/circuit/6443888190947328 ). I'll update it soon.

the two opamps are shorted. if the first output goes high and the second goes low, it's dead short; both amps will pop. try it on a real stereo; wire the outputs together and turn up the volume and it will bang.

unbalanced is perfectly fine for that distance for audio. start thinking about balanced connections when you have to move signals in the MHz range over a metre or so of cable.

Thank you, faceblast. As you say, I've known it become troubles to use op-amps parallelly. So, I'll try full balanced processing to except some distortion or noise from amps including, not only cables, e.g. thermal distortion. Of course, it is to use low voltage powe supply. I think it may not be big different to use balanced or unbalanced for the cables of headphone. Then I'd wondered to convert it.