Those TRS Balanced outs are not connected to the headphone amplifier circuitry (i.e. pure line-outs); you are dreaming if you think you are getting the benefit of a balanced head-amp, even if just by a fraction.
In addition, directly connecting your SE-ended phone to one of those terminals will only give you mono sound. Mono sound, I repeat. One side will also be driven out of phase and won't sound right. Edit: With the possibility of using an adapter to combine the two jacks (dual male TRS to single female TRS), which I believe is what you are originally referring to, you sure will get a stereo signal. But, as has been mentioned by mbd2884, I can only hope no damage has been dealt to your m902 through the bridging of the 'cold' signals.
I strongly suggest you learn more about things like this (if you consider yourself to belong to the first group of people you referenced in your sig) before making something as grossly misinformed as this. Your "advice" has the potential of causing equipment damage to ill-informed people.