A nice sealed Sub, for essentially $90. ah, yes it is worth renovating.

I've had MX-100 & 200, they are usually characterized as nice "musical " subs.
whatever that means. They don't always play really low or really loud down low ie., <25Hz.
But for most applications they are well regarded. the push pull dual driver design was & is
well regarded. I copied that design with a Pair of Adire Tempests drivers to good effect.