One would be limited to a 3-way design at the very least given this thing's bandwidth of 6kHz - 40kHz. Power handling isn't looking too good either. If they're available for a lot cheaper than advertised, then these might be suitable for a line array project (which is probably how the original [organ] supplier built products based on these things).
I hope JE would stop kidding around with cheap stuff and start selling good drivers -- this has been the common sentiment among local enthusiasts. They don't have any good tweeters at the moment to start with.