Actually, the older Sparks have just a midbass and tweeter loaded up high in the cabinet, very similar to the Virgo II's minus the side firing woofers. What you see down low is a large port, which adds a little bass. If you are in a small room, I think the bass will really suprise you. My room is about 13X25 in a basement, and I had a hard time loading the room correctly, so I picked up an ACI Force subwoofer, and this is a phenominal sound for the investment. Your listening habits will tell you if you have enough bass, if you don't listen to rap or techno, these should do the trick. High level transparency, period.
-Fish
-Fish