How Do I Adjust A Subwoofer For Best Sound?

Adding speakers does a similar thing, generally you only do that with subs multiple fronts add phasing issues. Basically getting 10 db louder can also be done by 10 times the speakers and every 3 db by doubling the speakers adding a port also gives 3 db. So going from one seal sub to 4 subs in a ported box almost doubles the loudness by gaining 9 dbs.


Then you start adding in the effect of distance, Double the distance cuts volume by 6 db cut distance in half gain 6 db, you see why concerts have insane systems.
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