JL Audio Amps

[indosia 10+ year member]

Sensitivity is a good way to determine how loud a mid/tweet is. But not a subwoofer. 87 db is pretty high for a 10. Mine are like 85db

 

[audiolife 5,000+ posts]

in a sub there are alot of factors with spl with reguards to subs enclosure, transfer function, power compression, just to name a few