@Chuck Sartor posted:BF-0000021 is 45mm, not 50mm. MTH has been out of those for years, wonder where they found those at. Is that what they are calling it now, BF-0000022? There wasn't a BF-22 before.
I just searched parts and found the 50mm 16 ohm speaker, I believe it used to be the BF-0000033, that's the only 16 ohm 50mm speaker listed on the common parts list from 2016.