I own the DX80 as well and using the headphone out as a line out results in a huge loss of detail for me. You're not sending the right input voltage to your amp this way as far as I know, someone please correct me. It works, but it doesn't sound right to me. I would suggest buying a Schiit Bifrost Multibit or maybe a Modi Multibit and using the coax output on the DX80. This gives the best results by far as you're able to use the DX80 as a transport and it beats the pants off of using a computer through USB in my opinion. Bass and midrange is much tighter and clear and the background is completely black and silent. No matter what kind of things I try with USB, I can always hear some noise in the background if I turn the volume up on the amp.
Also keep in mind that you might be expecting a lot more bass than the LCD-2 actually puts out. It's not a bass head headphone. It has extremely articulate and slammy bass all the way down to 5 Hz, but it doesn't throw it in your face. You may want to take a while to just listen and see what kinds of new details you can hear in the bass line.
I think that upgrading to the Noir was worth it for me. It's a gorgeous cable and it's totally indestructible, whereas the stock cable had knicks in it after a year of use for me. The Noir tightens up the bass ever so slightly to my ears, FWIW.
I did not think of that not really familiar with DACs basically never used one in a set up I was more of a portable guy myself but since I started driving and lazy to walk anywhere
I am now diving deeper and deeper into the home audio set up , I have always been into headphones and have purchased many pairs .
But as you may know I'm addicted to getting to best sound I can get well as far as my budget would stretch anyway
Anyway ' think your way would be my next option as far as a DAC via coax makes sense to use the dx80 as a transport hopefully the low end will be more apparent
I was saying there was no base via the line out and I know what the LCDs are capable of , the base via the line out was in the league of the hd600 that's why I preferred to
Use the headphone out so I can adjust the eq.
But your right I did loose some micro detail in the music which is a no no for sure , I will invest my money into a new DAC the bifrost multibit or something else maybe .
Never liked the thought of using a Mac or PC as a transport I'm more of a go to bed and listen in the quiet and darkness were I can enjoy my music to the full
Just think using a portable player in my set up is an easier solution , many people use macbook pro which I thought would give you the best results but I don't think that's true
Correct me if I am wrong .
You mentioned or recommended a cable for the lcd2 do you really think it's worth upgrading from stock cable .
Cheers .