How Do I Adjust A Subwoofer For Best Sound?

The speakers sensitivity is important spec especially for fronts that generally can't handle crazy power which is a problem since loudness (db) and an amps wattaged ain't linear.

Loudness is rated in db, 3 db is considered a barely noticeable change in volume 6 db is a very noticeable change and 10 db is double the loudness. It takes 10 times the wattage to double the loudness (10 db)
and it takes doubling the wattage to move up 3 db and 4 times to move up 6 db.

So it's a lot easier to gain loudness through speaker sensitivity a 95 db speaker gonna be twice aa loud as an 85 db with any given wattage.

One good thing about they way wattage works say you got a 50 to an 150 watt amp on the front to double the loudness you would need 500-1500 watts for most people be insanely over kill.