SVS PB2000 amp die

Hey

I have a subwoofer from Svs, model pb2000, unfortunately the subwoofer's internal amplifier burned out.
I couldn't find a diagram online to figure out how to fix it.
While browsing the web, I saw that there is another company that uses the same amplifier.
Does anyone know which company?
Does anyone happen to have the diagram? Or what is the best way to amplify the subwoofer so that it works properly? Even with another external amplifier. Thanks.