First, thanks for info...

I agree that the crossover frequencies are somewhat unimportant, but one can get caught up in comparison specs.

I have to disagree with you on overload protection. I have 2 pairs of speakers from the Allison AL series and the whole lineup featured "Powershield" overload protection. I have in the past tripped the breaker and it worked, lowering the output until I lowered the volume control. You are right, it won't protect against clipping, but this system seems to work for sustained overdriving of the speakers. You can still blow drivers, so it's probably a moot point.

Thanks,
Nick