I'm looking for a good bluetooth receiver for my over-ear headphones (Shure 1540). These are what I found: - FiiO BRT1 (SBC, apt-x) - Creative Sound Blaster E3 (SBC, AAC, apt-x) - Astell&Kern XB10 (SBC, ACC, apt-x, apt-x HD) I use android phone Sony Z5 with Bluetooth 4.1 and apt-X and Sony LDAC wireless High-Res Audio codec. I found it here https://www.gsmarena.com/sony_xperia_z5-review-1293.php I hope it is true. The phone has android 7 and there will not be any upgrade to android 8. Does it mean it will use aptX to play music from spotify? Is it worth to buy one of the receivers or will the SQ be horrible? I compared the wired output directly from Z5 and using Chord Mojo and I didn't any difference. Will this be noticable downgrading of SQ? Which is the most reasonable option? Or any other idea? Something compact. I will attache the receiver to the headphones bridge.