I would only repair if it has sentimental value. Modern subwoofers are hard to sell and get repaired. Older ones are heavier and will be more difficult. You might find a vintage shop that would take it for parts or might have an interest in refurbing. That would be your best bet
Worth repairing a Velodyne ULD-12 from the 90's?
My father had an older Velodyne ULD-12 from the 90's that I inherited when he passed. It is not working. I have no need for it but I'm wondering if it's worth repairing. Do they have any market value these days? Or should I just toss it?