Musical Fidelity X-Can V8 DAC/USB Quality

Received the Musical Fidelity X-can V8. Used with AKG K702 headphones and A prima Luna P8 tube CDP. I not impressed at all. I am hoping that the HD650 headphones will be better.
Bare in mind this is the first time I have listened to a any semi upper end headphoe equipment and the only reference I have is a 22K 2 channel system to compare it with. Even though from time to time i have came across reviews, etc., that suggest a descent headphone system can rival a more exspensive 2 channel in terms of detail and tonal quality, I just cant see it, and the more I think about it, it just doesnt make sense, when you start comparing power supplies, amps, cables, etc.
I bought the above referenced headphone system based on review only. I am going to make a point of going to some local Audio stores and listening to some headphones/amp prior to making any further headphone purchases. Maybe there are some out there that I would be satisfied with, but this is not it.
Thnx
Brad

Hey BradF

Definitely give the MF X-Can V8 a try with the Sennheiser 650. A couple of headphone guys who were helping me out on another forum told me that the MV X-Can V8 REALLY mates well with the Sennheiser 580, 600 and 650. Also regarding the AKG K702s one owner by me told me they need a very long time for break-in. Over 300 hours. He had a stock pair of the AKG 702 with a Woo headphone amp. Are you AKG K702s new?

Also with a 22K sounding system 2 channel I think you need much more high-end headphone gear to even come close to what you have sound wise in your 2 channel rig. Maybe a headphone amp from Ray Samuels or Rudistor? Min $1000 headphones?

The thing i don't like about it, is the gigantic volume knob. :\ overall, it does have a decent SQ for the price.