The upgrade puts the old OHMs in the modern big leagues sound wise, so if that appeals to you, it is worth it. You can do it yourself but it is not necessarily trivial. You have to take the old OHM driver off, pry off the old crossover/terminal board in the bottom, replace it using a glue gun, and reassemble with the new driver. Also there are cros supports you have you work through and sometimes these come loose and have to be reattached with the glue gun also.
Upgrade my Ohm Walsh 2
I have a pair of Ohm Walsh 2 in a second system powered by a acoustic research amp that sounds great-was wondering if the upgrade that Ohm offers is worth the investment.