Always 放在耳仔位置. It is very simple - the mic is used to receive the sound that your ears will receive, and then send the signal back to the AV Amp to determine distance, sound level, and EQ adjustment.
Zappiti Pro 4K HDR Media Player
Pioneer UDP-LX500
Pioneer SC-LX901
JVC DLA-N5
JL Audio E110
PS Audio Power Plant P10