Almost done headphone setup

[Irrelevant]

Hello everyone,

 

First off - so glad this forum exists. I've been reading for days and there is some truly great info around here.

 

I'm building a setup to listen my turntable with headphones that I also want to be usable for digital files from my laptop. I currently have Senn HD800s and the Senn HDVD800 DAC+amp.

 

Question #1 (the dumb one):

If I get a USB cord to connect my laptop to the amp, and buy a balanced after-market headphone cable such as this,is that all I need to get high quality "balanced" sound?

 

Question #2:

This one is on getting balanced audio from the turntable. If I get the cable mentioned above, I understand I'll have a balanced connection from amp to headphones. I also understand that the sound created from the turntable is "balanced". Therefore the only thing in the middle is the pre-amp. I currently only own the basic Pro-ject pre-amp, which only has RCA inputs.

 

My questions therefore are these:

Is it even possible to get "balanced" sound from the turntable through pre-amp through amp through headphones?

If so, does this mean I need to get a "balanced" pre-amp and any recommendations?

I have the Pro-ject Debut Carbon - does anyone know if this thing can output "balanced" audio?

 

Thank you!