Thanks. I guess what I'm not clear is: if D1 is the pre-amp, then it was feed into the integrated amp, which has its own pre-amp stage. So there are two pre-amp in the chain ? On the other hand, if I push the direct button, the volume control is by-passed which means that the signal no-longer goes through the pre-amp stage of D1 ? But doe that mean I can't really take advantage of tube output if I do that ?