Can the KA13 adequately power HD6XX headphones? I recently purchased a pair. I'm currently running it out of a Lenovo Thunderbolt docking station. No idea which DAC its using or power output. It sounds good, but not sure what I'm missing? I've never owned a separate dac/amp before. I'm also an Iphone user. I would mostly be using at my desk with my laptop, but also it would be nice to have some portability and use with my Iphone in bed. Don't need it for outside the house though.
I'm debating between the FiiO KA13, BTR15 and K7BT. Obviously different use cases, but not quite sure what would be best.
-KA13 - seems to have the power, but too good to be true? Would I be sacrificing sound quality?
-BTR15 - BT and battery are nice features for portability, along with the ability to put it in PC mode to bypass the battery, but does it have enough power?
-K7BT - significantly more expensive and less portable, but would it sound significantly better?
Thanks in advance for helping out a noob trying to get better sound out of the music they love without breaking the bank.