When listening to music (mostly classic rock), I have noticed that the mid to upper bass levels are quite lacking and overall the sound is very thin. Specifically, the bass guitar and kick drum levels are very soft and muddy when compared to the higher frequencies. The output below these frequencies that is coming from the sub sounds fine to me. Turning up the bass knob on the receiver just makes the sound muddier. This is most noticeable in 2-channel mode, but also on DTS CDs and anytime rock/pop/jazz music is played in a movie. It really sounds weak. Is this due to my speaker/receiver combo? I have Paradigm Monitor 7 v.1 mains, cc-370 center, mini-monitor v.2 rears, and a PDR-10 sub. My receiver is a Yamaha RXV-596. This combo doesn't sound very musical to me at all right now. My next upgrade was going to be an SVS, but will upgrading my receiver make a huge difference when it comes to music? Which receiver would make the most impact with the bass, be more musical overall? Thanks!