I use the Corda Soul primarily as a preamplifier in a stereo speaker setup with Purifi-based class D power amplifier with XLR analog inputs and Swedish Marten speakers. The sound quality of Corda Soul in preamplifier use was a big surprise to me, as my previous preamplifier was not bad at all, and with Corda Soul I felt like entering an entirely new level or class in terms of sound quality. That big difference alone would have covered the big price of the unit, and then you have all those DSP controls - and a top class headphone amplifier! Yes, it is...