Inductor type for baffle step

I have a question on the type of inductor to use (gauge and core type) in my application:

1-1.2mH inductor and 5-10ohm resistor are flattening out the response nicely.

This is the project and the baffle step is for the SB Acoustics FR drivers.
omni BT speaker design -

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Inductor:
1. small as possible to not degrade sound quality
2. baffle step in a FR driver. sealed box.

Resistor:
1. wattage?

thanks!