Everybody is welcome to their opinion and experience, obviously, but have you considered that the JEL50 and 100 models aren’t the same amp?
When I say the JEL50 is a low end monster, it’s not a comparative statement. This amp has a shit load of low end. Period. Being a bright amp has nothing to do with the amount of lows on tap. Those frequencies can be mutually exclusive on any amp so I guess I’m not really seeing what brightness has to do with low end.
That said, I said the reasons I liked it are mainly because of it being brighter and more raw/less refined than his other amps so I think we agree more than you realize.