I'm trying to get new emotions from sound. And now I think what to do: either buy headphones of a new format for myself - in-ear (I always wore full-size ones), or try to improve something with what I have on hand - ifi black label and jvc sz2000. For ifi, I have already bought 3 new operational amplifiers and 8 panasonic os-con capacitors of larger capacity, when I have free time and a new soldering iron arrives, I will try to re-solder (I need to pray so as not to break anything). Now we need to deal with the headphones, which I don't really want to change because of their incredible bass, but I want to improve them in some way. And the only thing that comes to mind is to divide the sound stream into 2 speakers (LF and MF / HF). There is no exact solution, there is still an idea to get the signal from the DAC at the "direct" RCA output, then pass it through an external active crossover and run one of the output channels (most likely MF / HF) through the 3.5 aux black label to the amplifying part. And the second channel through another external amplifier (just one is lying around for almost a year)