An easy way to determine the relative quality of a speaker is the weight of the magnet.......the heavier the speaker, likely the better the quality.
doc
This I did know. What I didn't know was exactly how wimpy the original woofers were until I pulled them from the cabinet. The cabinets were quite heavy, almost too much for me to walk and carry. ALL of the speakers have been replaced now. My system sounds pretty good, all in all. However, I'm not an audiophile and those types would probably disagree with me.
The only problem I have now is that the turntable seems to lack bass. It's there, but pretty lame when compared to CDs or MP3s. My research leads me towards replacing the cartridge, but that's for another time. I have things that I MUST tend to before I spend any more $$ on my entertainment venues.