Switchable Fender TMB to James equalisation for bass amp

Hi everyone,

this thread:
Dumble tone stack explained (in 60 seconds) - The Amp Garage

made me clearer what is the function of the rock/jazz switch on Dumble amps:

DumbleRock.jpg


DumbleJazz.jpg


It switches from a Fender classical TMB eq to a James like eq.
I would like to have something similar to have an Aguilar db750 to 751 switchable kind of equalisation on one single preamp.

I would like to know how values can be chosen.

Aguilar DB750 schematic is already on this forum here:
https://www.diyaudio.com/forums/att...-aguilar-amps-aguilar-db750-schemos080409-pdf

While Aguilar db751 says:
EQ Section: passive tone stack with active midrange element
Bass: +12 / -12 @ 40Hz
Midrange: +12 / -12 @ 750Hz
Treble: +12 / -7 @ 4kHz

Thanks in advance
 
Thanks Printer2,

yours answer was expected, and I admit I forgot to write that I already have that software and I sketched some values, but I would like to know something more related to those specific amps and the possibility to switch from one version to the other with good results for bass too.

EG
the 40 Hz and 4 kHz are defined by -3dB points of the High and Low controls when fully engaged/cut?

Thanks again.