I have a bass cabinet I have very little money into and was thinking about upgrading the speaker. What kind of specs do I need to look into to make sure it's a proper replacement/upgrade? Specific Details: Cab-Acoustic B115 Dimensions-24"x25"x16" Sealed w/ horn 8 ohms Speaker considering using: Celestion BN15-400S 8 ohm The only thing I know is Avatar has a cab like this but it has a little more volume than mine and has an open slot front port too and no horn. How do I know it would be ok? Specs page for it: speaker-http://celestion.com/product/34/bn15400s/ Has anybody else used this speaker in a similarly sized sealed cab? Thanks for any input.