Yes, both the transmitter and the receiver need to support aptX Low Latency to take full advantage. Different brands claim different latencies.. but aptX-LL  should be < 40ms by specification.   Here are some examples:     By the way.. those Miccus SR-71 look exactly like the Minelabs and so do the FeinTech AKH 4-00... Pretty sure, those are rebranded generic headphones.. As for the chipset - afaik the CSR8675 also supports aptX-LL, maybe some