Hello - does Fryette have additional information on the LXII depth and presence parameters or specifications, such as the frequency impacted at the Q?
As you know they are not EQ control, they vary the negative feedback at low and high frequencies but do have a subtle EQ-like effect. Given that I’m not sure how best to give you the information you want. I’d have to measure it, which I’m happy to do 
but it might not be so easy to treat them like an EQ because they are doing more than that.
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