Hmm, the sub box is actually in two parts: the speaker section and then some electrickery (seemed to be the power amp but not the gain / LP adjustment shown on
Alpine - Subwoofer Amplificati - SWE-1200 )
Once the sub is unbolted from the cubby box this reveals another set of screws allowing access to these components (and extra cable).
When I was in there (during an ex-box install) I didn't notice any adjustment dials, but then again I wasn't looking for them specifically as I adjust gain from the (stock) head unit.
Not sure if that is what you are after, but hope this helps...
Bookmarks