Miller & Kreisel V-125 powered subwoofer
Not really working properly, but I strongly suspect someone with the skills, tools, and time could repair it to fully functioning.
You can see in the photo that it is missing the RCA input jack for the right input. I only used the mono/LFE input, which at one point was broken so I repurposed the right input jack.
M&K V-125 subwoofer, repair (Phinney Ridge)
This offer has been gifted to someone and is no longer available.