Actually, if your current speakers aren't actually damaged,
allow me to elaborate. Add the amp, find an SC-901 and drop
in a sub. The SC-816 is not really a unit that I'd consider a
decent HU and the 901 has an EQ you can tweak to suit.
Just Sayin'.
Read this?
http://jimrothe.com/volvo/volvo-dynaudio.html
If you really want an improvement using OEM drivers...






