I really like the sound too. and it cheap for the sound changeDon’t bother finding the 1.72REL firmware. It has more problems. Just get the su-2 if you need a USB bridge. Some guy at ASR has already measured it, it’s better than the u16. There is no need to do a listening test between the two in my case, because the u16 is simply not usable.
Driver and firmware is a nightmare