Compressor question

Maybe it will be interesting. Frequency response of amplifiers jbl partybox 120
 

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Same observation for me: smile eq taking place relative to level... it really looks like a 'dynamic' eq to me, a very low Q bell attenuation centered around 500hz applied.

Maybe it's not even dynamic as it is relatively easy in digital to make attenuation of eq and loudspeaker level linked.
 
In my crossover circuit, I plan to use this low-frequency amplification circuit (highlighted in green). This is a single-band parametric equalizer with the ability to change the frequency, quality factor, and peak height.
I have an idea to control the height of this peak using an external signal depending on the volume level. Perhaps a photoresistor + LED.
I have absolutely no understanding of circuit design, so I would be grateful for advice in this direction. Perhaps this will be better than implementing a compressor.
image_2025-02-28_08-40-07.png
 

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