Question regarding UR22 internal "D-Pre" preamps

Hi, I recently purchased a UR22 and ran into some questions which I could not answer. Can anyone here help answer the following?

  1. Do the internal preamps in the UR22 have enough gain to use with ribbon microphones?
  2. Can the internal preamps in the UR22 be bypassed?

Any help would is greatly appreciated. Thank you. - J