x2 I wasn't fond of mine.Of the two, I'd Pick the Q over the SX.
IMO the SX sounds like ***.
reading > jooI like the BL better then the sx in sq and spl. BL doesn't sound bad at all and gets louder then the Q.
//content.invisioncic.com/y282845/emoticons/bsflag.gif.21f42eccd34b7d1eb1608fb1b59b69c3.gifSee My first sub was a comp/spl type speaker and it sounded like poo and did'nt last that long
From a lot of other's testing, the sx didn't come out to be a very loud driver.It really depends what you are looking for. If you care so much about dbs, go with the SX