So, I put together an Aikido Noval HPA. Very pleased with the overall result so far.    At the moment i'm tuning the ouput caps. My HD700 (150 ohms) needs a lot of capacitance for a low cutoff. It should really be at least 60uF.    The Daytons (30uF) provided with the kit don't sound too...

I was just browsing the site of Metum Acoustics and saw something which might be worth mentioning here.    They have their first headphone amp coming out in december. There aren´t any specs available yet just that ist´s class A and shares the form factor with the Octave MkII DAC.  ...