I am actually finding the basic hifi system quite a lot better than I had expected (I really did not expect much anyway). I ran a few test tones ranging from 5Hz to 80Hz today and was surprised that I could actually feel the system at even 16Hz. At 25Hz the system was quite loud. I did not use any db meter, but just based on casual listening I won't be surprised if the system is doing a 30Hz +/- 3db.
However, I wish it would automatically pump up the bass at lower volumes (something similar to what Audessy Dynamic volume does). The sound overall seemed very bright. I also found it a bit difficult to get the right imaging for the drivers seat given the basic setup, but hey I think I can now live with the system for a few months before I do any upgrades.