I agree with several of the post regarding changing drivers and tweeters. That is usually a bad idea if you do not know what you are doing.
However, a great upgrade is to re-wire the internal wiring with the same or better quality wire you are using as speaker wire. While doing this you can also remove any brass or metal hardware used to connect the standard wire and make nice solder connections with Silver Solder (WBT or AQ Brand) This simple mod can take you to the next step in sound without spending much money at all. For example, I re-wired my Sonus Fabers with XLO Reference Type 5 as that is what I use for my speaker wire.
KiD
Chris
However, a great upgrade is to re-wire the internal wiring with the same or better quality wire you are using as speaker wire. While doing this you can also remove any brass or metal hardware used to connect the standard wire and make nice solder connections with Silver Solder (WBT or AQ Brand) This simple mod can take you to the next step in sound without spending much money at all. For example, I re-wired my Sonus Fabers with XLO Reference Type 5 as that is what I use for my speaker wire.
KiD
Chris