Bose Sytem and external output? Does that work?

Hello.
I have a Bose system in my V8 which works (next week).
I want the bass. But low bass area highlights something.
So for me, the question arises: Where can I go with the power amplifier to get the signal?
The Bose radio only releases a small impulse - right? Is the standard commercial power stage likely to work?

So that I can be understood correctly. I just want to attach a subwoofer to it. Otherwise, the Bose system remains as it is now. The additional power amplifier is to operate only the subowoofer, that's all...
My power amplifier (Rodek Monoblock) also has hi-input inputs. So I don't necessarily need chinch connections on the radio (which are also not available)

thanks for the answers