TurinUsing software EQ can cause phase issues when listening to music.
That being said this is a good deal for a decent pair of headphones.
I've heard this around before, but I never understood why a digital EQ would cause phase issues, assuming that the issue here is not the delay of output, but rather the variance of phase with frequency - affecting the frequency response of an equalizer. Analogue eq can cause some "phase issues" due to the rc relationship of the filters, but this is insignificant with good design. DSP-based filters should have even less of these issues so long as the sampling frequency is high enough.