I have a PSW404 that is 5 years old. The sub stopped working a few weeks ago. I was going to just replace the amp but a new replacement amp is 224.00. When I purchased the amp new it was only 299.00. I have a PSW110 as a stand-in but now the question is what to do with the 404. at 224. for the amp I might as well just buy a second 110 at 249.00. I just hate the idea of taking the 404 to the trash dump !