I have read in some text of Tenzin Wangyal Rinpoche that the throat chakra is not situated in the center of the throat but rather lower, in the base of throat, where throat meets the body (don't remember the text but the information I know for sure).
But Tenzin Wangyal Rinpoche is a teacher from Bonpo-tradition. So I am not sure if it is the same also for Buddhist tantra?
(Because some things differ very much - e.g. where Buddhists have OM Ah HUM, Bonpos have A OM HUM; the way Bonpos do 9 purification breathings differs too ...)
I know some traditions hold the throat chakra to be directly at the adam's apple, for instance in Lama Thubten Yeshe's Bliss of Inner Fire
book he explicitly states "The throat chakra is located directly behind the Adam's apple"
. But you should go with whatever your teacher says, if Tenzin Wangyal is your teacher and says the throat chakra is in the base of the throat then that is right, it's more about the connection to the transmission and the lineage than anything.