is spl out with a sealed box

[slipknot87420 10+ year member]

ok i have 2 12's each have 2.0 cubic feet i was wondering how much spl u loose with a sealed box and if 2 12's wiht 2.0 cubic compared with a ported box i was thinking maybe around 5 db but i dunno.

Click to read more...

 

[F150Matt 10+ year member]

I dont know about jensens in a sealed box but with my two 12's in a 3ft^3 did 150db's in outlaw SPL competition. I am still working on perfecting my ported box but I'll let u know what the difference is when i try it out at a competition.

 

[slipknot87420 10+ year member]

ok thanks

 

[JTz62 10+ year member]

As a rule of thumb you gain 3 db going from sealed to ported. Which is effectively twice as loud. This is of course how it works out on paper, but you don't always gain that much.