Portable budget system. Class D Audio



I am trying to complete a small, portable budget system for my daughter, a traveling nurse.  She currently has:
Elac Uni-fi UB5 speakers.    4 ohm   85db
Schitt Sys  passive pre/volume control
Dragonfly dac
Pangea pc, ic, speaker cables
Mac computer for streaming
I’m about to order a CDA -250C amp from Class D Audio.  I would like to hear from anyone who has experience with this amp.
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Question if she already has Schitt Audio pre why not one of their amp's Vidar probably best suited for her speakers and same price range as the Class D amp. not that there is anything wrong with Class D, though it is probably smaller.  
I have the SDS-470C and it has been great for the past several years. I would not use it with really sensitive speakers though as it is a bit noisy...not an issue with the Elacs.

I would also not use any of the Class D Audio amps with a passive pre since they need gain to come to life due to low sensitivity (2V input) and low input impedence. IMHO, the amp would not be a good match for that system.

Indeed, for a portable system I think going with a pair of active speakers would be a better solution. Especially something with a built-in dac like the KEF LSX or LS50W.
Thanks for the feedback.  Audio Adviser has a sale on Parasound New Classic 2125v2.  One is in shipment now.  I shared your concern about the passive pre/volume control. The Parasound should work well I think.