All OP amps seem to have at least some sort of "audio" character of their own, allthough measurements don't seem to show this, but at least they give a hint. My personal OP amp preference for the Fosi V3 are Ti OPA1656 but others have di...
This is a review, listening test and detailed measurements of the Fosi Audio SK-01 Headphone amp and preamplifier. It is was sent to me by the company and costs US $80. You can quickly see what distinguishes the SK-01 from myriad of other headphone amps: inclusion of tone control...