Thanks for your input J_garcia. If it were blown, it would most likely still be producing some sort of sound then, correct? And moving forward, is it possible to fix an individual component on the plate amp? Or is ordering a new plate amp the way to go?
No it would not. Generally a blown amp is dead silent.
The only thing serviceable is the connection to the sub.
Remove the driver an make sure one of the two leads has not come off. If the driver is connected to the plate amp this unit is not serviceable and needs to go to the recycling center.
I doubt the plate amp for that sub is available. I have had a look at the unit. The plate amp does have some specialized inbuilt functions such as Eq and also limiters to prevent driver damage. So you can not use a generic amp.
I would comment that this unit would not now qualify as a sub if it ever did, as the 3 db point is 55 Hz. A lot of bookshelf speakers can easily make that, although they would not have the power handling or the sensitivity.
The problem is that the unit is dated and not worth money and resources. You will be better off putting funds to a newer updated unit.