Here is a video I made a while ago trying to capture timpani and orchestral scale from my small room and small speakers. I made this right after I started using my Ching Cheng power cords on my amps and replaced the IEC connector on the JPS Labs cable with Hubbell industrial outlets. In room, the sound really improved. The video does not quite capture it, but one does get a hint of the impact from the drums and overall dynamics.
I have also happily discovered that my twenty year old headphone amp, a HeadRoom, can be hooked up to my iMac and used with my Sennheiser HD580 headphones. The combination actually improves the sound of these videos a fair amount, especially in the bass. The amp also allows me to lower the output from the computer and increase the volume from the amp for a cleaner sound.
The video may be restricted in some locations due to copy writed material. Holst Planets, Uranus, Zubin Mehta, Decca: