FYIMy beloved Walsh 4s have been in storage for a few years and before bringing them back to replace my "2s" I sent them to Ohm to have them "refurbished. When I spoke to John I mentioned that I would love to do the full upgrade to the 4-3000 but it was not within my budget. He mentioned that there was a "tweeter upgrade" that was just what I was looking for. It is typically offered when the "maintenance" also needs to replace a tweeter. I did not need my tweeters replaced but wanted more brightness that the later 3000 tweeter would offer. In this upgrade you get your surrounds replaced, upgraded tweeters, and modifications to the crossover in the can to accommodate them. You keep your additional controls and the associated crossover in the base. It is "plug and play", sounds terrific, and costs around $1000 (half of the 4-3000 upgrade) You miss out on higher power handling, the lighter weight motor, the deeper bass, and I assume the surrounds are foam? and not rubber (like the 2s?) so they eventually will have to be redone like most speakers.
As you would expect, John, Evan and staff are expert, caring, and know how to listen to speakers (and you). I am thrilled that years ago I found a speaker that to me, sounds right.
BTW, OHM has just announced that prices are going up....now.