when hooked to the PC, are you using any equalization on the playback ? Most audio programs have a software equalizer that lets you boost the bass and mid frequencies a bit, since many mp3 digital files are quite flat sounding.
What Yamaha sound system ? The ATH-AD700 headphones are well liked and should not under perform your expectations. I can imagine they might benefit from a headphone amplifier, particularly when attached to the PC (soundcards have very little real output power)
What Yamaha sound system ? The ATH-AD700 headphones are well liked and should not under perform your expectations. I can imagine they might benefit from a headphone amplifier, particularly when attached to the PC (soundcards have very little real output power)