It is interesting you guys are not hearing these things. A lot must have to do with your crossover settings. In my opinion my 80's are producing most of those frequencies based on my 80hz crossover.

And yes, after smoothing things out with my SMS-1 this "punch" did improve as I've eliminated most of nulls/peaks that were cancelling the frequencies in those ranges.

I think my new 600 amp has the updated firmware with no brickwall in place, but even before I've always heard the stand up bass strings and kick drum.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85