does not matter if you use analogue or digital front end. You need a preamp with enough current output to handle the dynamic swings. But don't listen to me or anyone else. Try it yourself, go without a preamp and run DAC directly into power amp (assuming you can control output level at some pt).
you will find dynamics are compressed, bass is not as good, and sound stage suffers.
you will find dynamics are compressed, bass is not as good, and sound stage suffers.