Hi Frank, looking at your signature you seem very well equipped to drive the TC...
Anyway, I asked the same question to many people some months ago and most told me "yes it can, but it depends on your taste/musical choices". I agree with that. In my case I bought a TC only when I was sure I could add an amp later on if needed (which I did, as I wrote recently in this thread).
Dave alone + TC with stock cable may also be a bit on the bright side for some. Dave + M Scaler + TC + SC cable would certainly offer a more relaxed but still very detailed/transparent listening experience. Crossfeed may also help you to compensate if you like it (I don't).
In short my personal take is: Dave is good for pop, most of rock with bass in evidence. Unless you want super bass you will be fine with those genres. For jazz, small acoustic bands, Dave may be a little thin depending on the recording but still good. For symphonic classical music, Dave is not enough: both volume and physical feeling of the orchestra's sections are lacking.
If you add a very transparent amp you may end up very close to the sound signature of the Dave alone, with a nice reserve of volume.