The original Stockholm has only 1.1V output voltage which will cause some matching problem if the preamplifier has lesser impedance. The 2nd generation of the Stockholm will have 3.0V output voltage and increased current drive capacity.
Also, by many requests from all over the world, the 2nd generation of the Stockholm will be real no op-amp, and no feedback structure.
Stockholm est. release time: Jan, 2013
Balanced Stockholm est. release time: Mar, 2013
Best Regards.
Jiun
Mhdt Labs