I’m trying to drive a Donner B1 with my PO-33, but I gather the voltage is not enough. Could I use a headphone amp? I need to boost it from 1V to >=2.5V for the B1. I gather that Volcas need something similar for this setup…

Just want some feedback before I go buy one. I looked at special purpose devices but they are sold out or hard to find. LMKWYT!