I have a iPad bit loss going into nuforce dac from here I have a schiit lyr headphone amp, I have many headphones,but would like others opinions on using the lyr here as preamp as it says it can be done in its manual,and will this or how will this if at all affect the sound signature of my hi end zen integrated amp? Will it be noticeably louder since there are two volumn controls between the dac and schiit lyr also the third volumn control on the se341. I need a little   Outside technical help here on this don't want to be pushing this new amp incorrectly.