
So, 8 years ago I got the HPA-01M from Drop, and wasn't impressed.
Enleum just sent me the HPA-23RM for review and this time things are totally different. Even out of the voltage port with the Utopias (2022, that sound comically bloated out of the current port, due to having an uneven impedance), the headphone drive and resolution are excellent.
It has only been a couple of days, so I'll post more later. But I'm impressed enough so far that I'm thinking that it may be better than a C9 (which I don't have any more to test, unfortunately). At $2,999 it should be!
https://enleum.com/hpa-23rm/