LOTS of good information above. Read it, try the ideas and draw your own conclusions.
My experience with subs has been good. Depending on your speakers, a sub can add a more solid foundation for the rest of the music. Can't build a great house on sand!
I currently have Merlin TSMs and a REL Strata III which are all sealed cabinets. Pairing sealed subs and speakers is easier because of the sharp roll off sealed cabinets present. If I could find a well preserved version of that same sub I'll buy it.
My experience with subs has been good. Depending on your speakers, a sub can add a more solid foundation for the rest of the music. Can't build a great house on sand!
I currently have Merlin TSMs and a REL Strata III which are all sealed cabinets. Pairing sealed subs and speakers is easier because of the sharp roll off sealed cabinets present. If I could find a well preserved version of that same sub I'll buy it.