Who are some of elite sub woofers?


Looking to replace Klipsch 12d

So many choices.
Ag insider logo xs@2xawooof
for music I like JL audio and Rel. Both would be a huge step up in quality. What is your budget and it is for just music or home theater too?

something with an active crossover is always nice. 


Jl fathom  amps seem to have a lot of issues, lots of people report them dying quickly.
Vandersteen 3 with 11 bands of EQ to address room issues below 120 hz singles start at $3k

or the very elite sub 9 in a carbon fiber wrapped low resonance enclosure, also w 11 band EQ, they come in pairs...for about $12k


Thank you all for insight.
Budge I'm guessing $1500 but thought about only one?Millercarbon suggested 3-4? That would change budget considerably.