Getting good sound quality below 200Hz

Pedroeb forgive my ignorance, but what am I looking at in that graph. I don't use the region 200Hz + where it is pretty ragged and have accepted that below 100 Hz its output is poor, exacerbated by the OB. But this is true of most 15" drivers in OB.

Ivan_nosnibor   "That makes them good for lower powered amps, but high sensitivity woofers IME tend to not exactly plumb the bass depths"

Is there a reason why this may be, and are there any lower sensitivity 15" drivers that I could think about. Power is not an issue as I have a 1000Wpc Ice amp available.

@bumpy48, I'm taking it that your listening experience is related to playing full range music but without the higher frequency drivers connnected. If that is the case, then I'm not sure that the listening experience will be that useful since the majority of bass instruments have harmonics way above the 200hz. That's precisely why there is a disjunction between what you hear when playing the bass drivers alone and then playing full range. You could get a synthesiser and play some sinewaves in the chosen frequency range but that won't be particularly educational either, I think.

Yoyoyaya  Looks like you are right about this, but it was a surprise to me and I needed a reality check.

I tend to agree. It’s as if you’re trying to fix what may not be broken. Without hearing the range of frequencies the instrument produces, it will never sound right. A bassist plucking the lowest note on the instrument cannot be reproduced if frequencies above 200 are excluded.