What are some of the amps that can bring out the best of the Sennheiser 820?

Please recommend a few amps that can drive the sennheiser 820 at their best from experience, thank you.

  1. What is your budget?
  2. What is your source? Along with this, what kind of sound signature do you like?
  3. Any special requirements, like "the amp can't be bigger than A x B x C?"
Go to any audio forum and look up amps that pair well with the HD 800 S; you'll find your answers there once you can answer those above questions.