Amp-in-the-room IRs

[antcarrier]

As I said if it's a behaviour of the speaker cone itself there's no reason to remove it IMHO (if our purpose is to capture the freq response faithfully)

This is what I initially thought too, but after using/capturing far field IRs for a long time I found that capturing this behaviour is undesirable. As faithful as it may be (to a guitar cab in an anechoic environment), it really does need to be minimised if you want your IR to sound best (ie, not phasey) in typical playing conditions such as through a FRFR rig or studio monitors.

I think you will find that if you tone match your FRFR to a far field IR, if this notch filter is present in the IR, then tone matching would still try to mimic the IR's (notched) behaviour unless you used a lot of smoothing in the tone match block.