Thank you for the feedback. I actually own an o2 combo and have been using it with the HD800 a little and its not so to my liking, which is why I wanted to know whether the V200 would be an improvement. For me, the HD800/o2 lacks something - just seems lifeless. However, with the HD650, its a...

Interesting. I have found that the o2 has a hard time driving the HD800 so, in that regard, I think the V200 will be a big upgrade. For easier to drive headphones (e.g., the HD650), I honestly can't say I can really imagine much of an "upgrade" over the o2, as it sounds incredible - a truly...

  Thank you for the thoughts. I was mainly interested in how much of an improvement one gets when going from the o2 (which was designed to essentially remove itself from the system) to something more substantial like the Vio V200. According to NwAvGuy who designed the o2, it should sound very...

Thank you for this - very helpful for me.

And thank you again for your quick replies and also for making such an awesome little package. I love this thing!

  Well, now I feel silly. I thought that the ODAC did not require being plugged in to a power source, when bypassing the O2. However, this is clearly not the case, as plugging in solved the problem and removed all distortion.

Yes, this is what I've done. But that doesn't answer my volume question...?

I'm not sure I understand. The ODAC combo I have does have a dedicated line out. I've connected it by running the USB into the ODAC and the line out into the external amplifier. Based on my read, you're indicating that I am correct to turn the volume down a little on the PC? I was mainly curious...

I have an O2 combo from JDS labs that I quite like. I just decided to try the DAC alone, hooked up to an RSA Raptor tube amp and I was a bit surprised at the levels of distortion I was hearing in the bass. If I turn the volume down on the PC and then compensate by increasing the volume on the...

Yeah. I really wanted it not to be a problem for me. I tried but found that after a while, I was shifting the headphones around to try and make the "hotspot" disappear. In the end, I decided that I shouldn't be trying to convince myself that I liked a pair of headphones that cost 700$...

and, while I'm at it, I'd also be interested to hear any thoughts on the V200 compared to some comparably priced tube amps such as the Woo Audio WA6 SE

I'm curious about people's thoughts on a Violectric hpa v200 versus and o2 for solid state options, paired with the HD800. I'm interested in the v200 based on people's comments about it pairing really well with the HD800, but I am not sure its really worth the cost over an o2?

And seriously, that theater is so sweet ;)

For me, there was no comparison - ODAC+O2 was head and shoulders above the Fiio E10 (I have JDS labs variant and love it). With the build to order options, you can customize it which is nice as well (e.g., 1/4 inch jack).

Just a quick comment - I had EL-8 open for a brief period, but returned them due to dis-comfort. I found that after an hour or so, the pressure on the top of my head was quite uncomfortable. As a long-time Sennheiser user, I've never experienced discomfort with headphones before. Definitely a...

Apparently I need to bump up my number of posts on here... so, where else to post a comment besides your great review?

A bit late to the party, but thank you for a great review.