It looks to me as if the Threshold was built to meet the balanced line standard, which is low impedance. The input impedance is set low to reduce ringing in line matching transformers that drive the input.
There are not that many preamps that can drive that load, but they *are* out there. To my knowledge there are only 2 tube preamps made that are equal to the task without loosing low frequency response. There should be a fair number of SS units that can drive that though.
There are not that many preamps that can drive that load, but they *are* out there. To my knowledge there are only 2 tube preamps made that are equal to the task without loosing low frequency response. There should be a fair number of SS units that can drive that though.