Reply To: Relive Hakhel!

Always,

Geirim seems to be referring to Geir tzedek.
The chiddush of geirim is that even though they may not understand the words of the Torah, they still come, since it’s not just about understanding, but the general feeling of awe with all of Klal Yisroel standing together.

??? ???”? ????? ????? ??? ? ?”?:
????? ????? ?????? ????? ????? ??? ??????? ???? ???? ????? ????? ????? ????? ???? ????? ?? ?????.

RE loudspeakers:

Since the idea is not just to understand, rather the general feeling – there is no need for everyone to be able to hear. The main mitzva is just to be there, and have the right kavana.

As the Rambam makes it clear at the end of the aforementioned halacha:
??? ????? ???? ????? ???? ??? ?????? ??, ??? ???? ????? ??? ???? ?? ????. ????? ???? ???? ??? ????? ?? ???? ?????? ?????, ????? ???? ??? ?????? ???? ??-?.
(This is not referring to someone who is deaf, since they are potur from Hakhel altogether (see Rambam ?? ?”?) – rather to those who are too distant from the king’s bima)