heres a better test if your system is resolving. hans zimmermans why so serious in the dark knight sound track. there is a moment i think in the 2 and a half or 3 and a half minute mark where there is a quiet passage with just very strong 30hz note playing. not only should the 30hz note be very well defined and powerful sounding, but you should also be able to hear a marching drum in the right channel, far back, but distinctly audible. if your system can resolve this, imo, you have a good system.