I think I just did something stupid. My Jurassic Park came with a subwoofer. It really makes the T-Rex roar. It is hooked up with alligator clips going from the speaker on the bottom to sub and has been operating for 3 months with no issue. I recently read how to hook up my hobbit to the same sub. I played a game and it rocked. I went over to the Jurrassic park afterwards and the sound was anemic and coming in and out of from loud to soft like certain speakers were only working intermediately. I didn't hear the woofer and looked at how it was plugged up. To my horror, I had switched the RCA jacks to the Output instead of the input on the woofer for my Jurassic Park. I had assumed (incorrectly) they were all inputs. When I was playing my Hobbit, the sound was going out to the sub and being powered from the sub to the speakers in the Jurassic Park. I have not troubleshot too much yet, but I am assuming I messed up the bottom speaker in my Jurassic Park. What do you guys think would be the most likely solution?

If it is the speaker, what is the best way to replace something like that?

Great news! After "unplugging and plugging back in" everything hooked up to the sound card it seems to be working just fine. The lesson learned here is 1 pinball machine per subwoofer.

Thanks for the help!