Probably some shitty, Chinese capacitors in the sub amp.

Too bad you're in Loveland. I coudl throw it on te bench here in Parker and take a look at it. Probably cheap parts cost to just shotgun some parts. Hell, if the caps are small enough and not odd values, I got tons here in stock.

Thing is, I just went looking to see what they were and I'm seeing them for like $22 online. Something different? https://www.google.com/shopping/prod...ed=0CDgQxBUwAA