Can the Sennheiser HD650 do BIG SCALE classical???

Hello Audiogoners,

I have the Senn HD650 (equinox cable) that I use with various high-end sources (analog and digital) and an MG Head DT amplifier. I love them. They make rock music rock, jazz swing, folk and chamber are wonderful and intimate, they are never bright, and are very comfortable.

However, big scale classical does not work for me. They have for me a bit of the "car stereo" syndrome, where the big scale dynamics blow me out, and just are not fun to listen to. The setup that I have now is not in control of large scale classical, and cannot handle big dynamic swings with confidence.

My question is this: Are these headphones capable of doing big scale classical with all the macro-dynamics well? I don't want to be reaching for the volume knob whenever a forte comes in. It's not that they sound bright or edgy, just not in control of the music. Really the only thing that I can think of optimizing for this setup is the amplifier. Would upgrading to a different amplifier enable these headphones to shine on large scale classical? If so - what amplifiers have you used to successful reproduce very macro-dynamic heavy large scale classical?

Thanks,
Todd