Set them to large for now so that we can see if we can get the drivers moving.

Also check polarity to make sure + is + and - is -. If polarity is wrong, bass will definitely be impacted.

If the yammy has a 4 or 6 ohm setting, set to 6 ohm.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated