I got the SMSL SAPII Pro HeadAmp by mail and costed me about US$50.  5 days ago. Thanks to Head-Fi  Website for my collections of reviews of a number of China brands Head Amps: FiiO, Topping.. Since I have a 1955+  DAC by SMSL,  I have confident in SAPII (PRO Version). The SMSL are looking as a triple set on my desk ( I also have the SMSL SA-98 Digital Amp.) My setup is :  USB from Foobar2000 media player  in  i-5 Windows 10 Asus Desktop computer to SMSL 1955+ DAC and  RCA to SMSL SAPII Pro. My monitor is AKG K701 - bought just 2 weeks earlier. ...