QUOTE(JC_jun @ Mar 21 2017, 12:29 PM)
hi, i am new to this, need advice.
i saw on amazon the dt 990 (32ohm model) is much cheaper than the 250ohm model, is it low impedance also meaning sacrificing sound quality?
Not really, it really depends on your usage, in overall term
32ohm - suitable for casual use, phone, laptop, pc without needed of amplification, however if you wish to increase the sound quality in future via DAC/Amplifier, the improvement might not be huge
250ohm - a must for Amplifier/ Good music player, it is design for you to go with decent amplification to get full sounding, if full amped, the 250ohm will sound better.
It is really depend on how u want to use normally.