Simulating a Speaker Cab in SPICE as a set of filters

[Vivek]

Found a great wav file and it worked fantastically!
The biggest challenge is adding a great cab sim.

I am trying to build a Speaker Cab sim in LTSPICE using a set of filters, one after the other.

Has anyone already measured the F,Q,G of the various filters that together begin to approximate a speaker cab ?

So far, I found this data :

A 2nd order high pass filter (2 poles around 130Hz, 2 zeros at the origin)
Two arbitrary peaking/shelving filters (2 poles and 2 zeros in the 500-2000Hz range)
A 2nd order low pass filter (2 poles around 5000Hz).



https://z2dsp.com/2017/09/01/speaker-cabinet-modelling/

and this:

Bridged-T notch filter. Produces the 400Hz notch found in the P10R response. Please note that the extra resistor in parallel with the capacitor to ground is not only for biasing the op-amp, but it also produces a high-pass shelving effect. High frequencies are then 6dB above low frequencies, as shown in the speaker response curve. To reduce the notch depth, you can replace the 1n and 15n caps with 1n5 and 10n, or even 2n2 and 6n8, respectively.

High-pass filter. This is the network between the first two op-amp stages. It simulates the low frequency rolloff of the speaker cabinet, plus the 90Hz peak. For deeper bass, you can replace the two 47nF caps with 56nF or 68nF. For less bass, use 39nF or 33nF.

Low-pass filter. These are the two identical networks between second and fourth op-amp stages. They simulate the steep high frequency rolloff of a guitar speaker, in addition to the peak near 3kHz. For more high frequency content, you can reduce the four 22k resistors to 18k or less. To cut more highs, increase them to 27k or more.


http://www.runoffgroove.com/condor-bulldog.png


http://www.runoffgroove.com/condor.html

[Vivek]

First Attempt, with data very roughly taken from https://z2dsp.com/2017/09/01/speaker-cabinet-modelling/