Quote Originally Posted by Coen
>snip< So what should I think of this? Any quick tips to get a better measurement or does this indicate something? >snip<

If what you just posted can be believed / then yeh / that's going to be pretty unlistenable ( IME ) .

The problem I have now, before I can comment on the 2 response curves that you've shown, I need to be convinced that the data you just got is worthwhile .
I ( we ) don't want to be chasing phantoms ( that are actually caused by some fault in the setup process / such as, inline EQ in the test chain ) .

How about measuring something else & then posting those results ( like some 2-way HiFi speaker that you figure is smooth & is enjoyable to listen to ) .

How are you driving signal into these devices ? ( it should be with a simple basic amp, plus a 40 to 50uF in line cap just before the driver offering DC protection ) .