Morrison speaker question

Does anyone know why this speaker had 5 plugs rather than 2 or 4?

drrsutliff Details Discussions Posts This discussion Message User 897 posts 08-24-2025 at 08:44pm Copy Comment URL Report Comment Edit Delete The fifth is most likely a ground option similar to what Tannoy does on their wiring options.
roxy54 Details Discussions Posts This discussion Message User 8,224 posts 08-25-2025 at 02:42am Copy Comment URL Report Comment Edit Delete Those are amazing speakers at a great price! I'd be tempted if I hadn't just bought speakers..
curiousjim Details Discussions Posts This discussion Message User 5,428 posts 08-25-2025 at 01:39pm Copy Comment URL Report Comment Edit Delete I’m pretty sure the fifth plug is for a ground. While it’s not common, there are several other speakers that have one.