ruwebWer3 days ago000Are these headphones recommended for use with a Sound Blaster X4 without an amplifier? That is why I am asking about the 2.5 mm jacks.Show in original language (German)Luca Frighetto19 hours ago000The 80 Ohm version can be operated without any problems with the Sound Blaster X4 sound card.Show in original language (German)Comment