I try to peek in to this thread and I haven't seen this mentioned. If I've missed it, please excuse me. Could I use Helix for the preamp, to a DT head for the tube power amp flavor, out to a load, then line out to a powercab for the speaker simulation? Am I wrong to think that the benefits of the DT power section would be negated by having to go line in to the powercab? Are the DT amps and powercabs two streams that shouldn't cross?