I have received my BTR3K from AliExpress and my very first impression is relly good. I did connect my Senn HD650 and it sounded nice! I mean, compared with my Ztella, this Fiio sounds more bold, warm with no hiss in the area of high frequencies and also with good volume!. I believe it is a really good option to listen to music (LDAC or APTX HD) or TV through bluetooth a really good price.