Does any one know what the difference is between the JBL 4311 and the JBL L-100 ? besides the numbers that is. I have empty cabinets for both, and the cabs look identical. They have the mod & ser plate on both. I want to replace the speakers, along with the X-over They have a 12", 5", and the tweet. To replace with OEM is outrageous, and I was thinking about Emminence 1240-SF. I don't want to sink a bunch of $ into them, just want to have them for possible mobil gigs.