My short opinion about Gustard A20h. I have it for about 6 months and it beated my previous fav desktop set : ifi iCan Pro + SMSL SU-9 which I have had for some years. Mainly I listening A20h alone with all headphones but sometimes I do a split with HiFiMAN EF6 and sound gets even more fuller and with more body. Amir's measurements and opinions you can put in fairy tales IMHO. In previous year I had SMSL SP200 and Monoprice THX 887 and they are near Gustard as much Tangzu Waner is near Thieaudio Monarch MKII :)