Equilizer for bass schematic?

Hello,
always struggling to get this deep bass feeling (<40Hz) from my 8" audio nirvana drivers, I was thinking if something can be done to improve their response.

Playing music using VLC player on PC and using it's graphic equilizer, I could boost the bass region below 40Hz and reduce the overal volume, so that a very contained and deep bass could be heard even from these small drivers.
I have successfully tested this on smaller drivers, even 6".

I wonder if a hardware graphic equilizer can be made for the bass region, prefferably analogue, that can precisely control the bass response <40Hz.
All the schematics I have seen on the net control just 50 and 63Hz only
 
So an eight inch speaker is small ?

How confusing....and what about its excursion ? If it's in the <5mm range any over-powering in the bass region would produce distortion .

To handle power in the bass region you need 1) excursion which implies 2) a soft suspension, rubber or foam.

Nevertheless, a fullrange is optimized to work well in the passband region of 100-10000 Hz ( let the whizzer cone produce adequate sound in the treble region )
 
So an eight inch speaker is small ?

How confusing....and what about its excursion ? If it's in the <5mm range any over-powering in the bass region would produce distortion .

To handle power in the bass region you need 1) excursion which implies 2) a soft suspension, rubber or foam.

Nevertheless, a fullrange is optimized to work well in the passband region of 100-10000 Hz ( let the whizzer cone produce adequate sound in the treble region )

I am not expert, but by lowering down the volume and increasing in software the desired bass region, a very warm desired to my taste bass is achieved even in my Realistic Minimus 7 tiny speakers