yeah, I think they use malfeituers for the tekno rig sometimes, and those boys are known to run their rig a little too hard.
You just end up with nasty high tension top end that leaves your ears ringing.
That`s bad engineering, and I get riled when I hear a rig being run badly, but that`s due to the fact that I used to run one myself, so I`m probably more of a sound snob than most.