If you use only amp, you do not bypass on board soundcard.
To get the most benefit, it is better to use dac/amp and bypass the on board soundcard.
use a good soundcard.
first of all, thanks for all the help, you are awsome!
second, i just now did i research about getting the Beyerdynamic all the way to israel, and i realized
that it's impossible under the price of 300$...
so for now my only choice is the sudio technica, plus a soundcard or dac\amp combo.
sorry for all the trouble, but are there any more choices of headphones to me?
I own K240 MK II, it is not suitable for a basshead.
from the list, I would pick M50 for a basshead.
But I do not have any idea about ad500x, k171 and k271 mkii (k270 has less bass than k240)
can you get k550, it is a closed phone. But it has enough bass.