Ha-Info U2 plus is constructed extremely great and expert quality. Street Address amp design at its many basic level (the schematic of the TPA6120) must not optimum DC for high impedance headsets (must just write specs as its best support to 250Ohm). However Ha-Info U2 plus sound is defined by four AD, natural sound quality light, extremely mild, smoothness and well balanced. Bass compact is not unfathomable, extremely broad soundstage, feeling extremely relaxed and listening comfort. We checked this symphony with great coffee, an excellent handle on the fast pace music, the sound does not stick but extremely in-depth.
Using Hi-fi Prodigy do for JA22es transport and Dac-end, compared to em it's way out SPDIF. As the JA22ES solely with DC, but regardless of the DAC audio quality from U2 is clean and rather more thorny. Bass is rather strong, not soft like the Prodigy. Maybe it is a combo quality DAC within reach of money. Basshead If not, this is a very rewarding alternative.