it would be interesting to see if there is any EQ already applied in the speakers amplifier. fortunately there is a nice Output begging for the analyzer
I own r1600 tiii by the way, bought it like 4 years ago for around $120, my by ear impressions are basically: great sounding at price range and speaker size, but wish it was bit more linear, especially in the low end. I apply -2db bass on the controls and use foam pads to make it a bit more bearable. That said, they make for great multimedia speakers, and somewhat acceptable music speakers. And as opposed to lsr305, don't hiss like crazy.