I am thinking of picking up the AKG K701 'phones. What is the advantage of using a headphone amp vs. the headphone jack on my Yamaha amp? Would I realize an improvement in sound considering a headphone amp budget of $300-$400? I'm not at all knowledgable about headphone amps so I appreciate any guidance on this.
BTW, if it matters, 90% of my listening is classical music.
Thanks for sharing your experience.